Microscopical Notes. 39

MICROSCOPICAL NOTES.

By E. G. Grahn, M. D.

List of Microscopical forms of life found in the water in the neighborhood of Brookville and Cedar Grove, Franklin County, Indiana. Cedar Grove is a small town six miles southeast of Brookville. The locations referred to herein as Butler's Run and Pulp Mill are just north of the limits of the Town of Brookville; and Mill Pond is within the southern limit of the same Town. The specimens referred to as taken at Cedar Grove are from Ramsey's Creek near that Town.
The water in which these forms were found was taken during the past winter at the time of a thaw.
I desire to acknowledge the assistance of Prof. D. S. Kellicott and Mr. J. W. Ward, of Buffalo, N. Y., in the identification of many of the species of diatoms. Since these gentlemen did not furnish the names of authorities referred to, I have simply appended their initials to such forms as were identified with their assistance. All doubtful species are designated in the usual way.

DIATOMACEÆ.
Cocconeis pediculus, K. & W. Pulp Mill. Scarce.
Cyclotella menighiniana, Vorce. Pulp Mill. Rather scarce.
Cymatapleura solea, --. Cedar Grove. Very scarce.
Cymbella gastroides, VanHeurck. From all of the localities near Brookville. Quite numerous.
Cymbella helvetica, VanHeurck. From all of the localities near Brookville. Numerous.
Cymbella lanceolata, Ehr. From all of the localities near Brookville. Scarce.
Dimenigramma sp. ?, K. & W. Pulp Mill and Cedar Grove. Scarce.
Epithemia gibba, K. & W. Pulp Mill and Cedar Grove. Numerous.
Epithemia granulata, K. & W. Cedar Grove. Very scarce.
Eunotia parallela, --. Mill Pond, Cedar Grove and Pulp Mill. Uncommon.
Fragillaria ungeriana, Grunow. Pulp Mill. Scarce.
Gomphonema acuminatum, VanHeurck. Pulp Mill and Cedar Grove. Numerous.
Gomphonema acuminatum, VanHeurck. This is a short variety with abrupt bars. Pulp Mill. Rather scarce.
Gomphonema capitatum, K. & W. Cedar Grove. Scarce.

40 Microscopical Notes.

Gomphonema constrictum, Ehr. Pulp Mill and Cedar Grove. Numerous.
Gomphonema curvatum, K. & W. Numerous in all the water examined.
Gomphonema dicotoma, K. & W. Cedar Grove. Numerous.
Gomphonema geminatum, K. & W. Pulp Mill. Very scarce.
Gomphonema sp. ? Pulp Mill.
Gomphonema sp. ? Pulp Mill.
Gomphonema sp. ? Pulp Mill.
Gomphonema sp. ? Pulp Mill and Cedar Grove.
Homeocladia sigmoidea, K. & W. Mill Pond. Very scarce.
Meridion constrictum, --. Numerous in all the water exmined.
Navicula affinis, small form, K. & W. Pulp Mill and Cedar Grove. Numerous.
Navicula affinis, large form, K. & W. Pulp Mill and Cedar Grove. Numerous.
Navicula amphirynchus, K. & W. Cedar Grove. Very scarce.
Navicula angustata, K. & W. Pulp Mill and Cedar Grove. Numerous.
Navicula borealis, Ehr. Pulp Mill and Butler's Run. Scarce.
Navicula cryptocephala, --. A few in all of the water examined.
Navicula dicephala, Vorce. Mill Pond and Pulp Mill. Scarce.
Navicula lanceolata, Pritch. Pulp Mill and Butler's Run. Scarce.
Navicula obtusata, K. & W. Pulp Mill and Cedar Grove. Numerous.
Navicula placentula, --. Pulp Mill. Scarce.
Navicula timodis, --. Pulp Mill and Cedar Grove. Very scarce.
Navicula viridis, K. & W. Cedar Grove. Scarce.
Nitschia amphioxys, --. Long var. Pulp Mill. Scarce.
Nitschia bicephala, --. Mill Pond. Scarce.
Nitschia vivax, K. & W. Mill Pond. Scarce.
Pinnularia (Navicula?) major, K. & W. Cedar Grove. Scarce.
Pleurosigma spencerii, --. Pulp Mill. Very scarce.
Surirella limosa, K. & W. Pulp Mill. Rather scarce.
Surirella linearis, K. & W. Pulp Mill. Scarce.
Surirella minuta, K. & W. Pulp Mill. Very scarce.
Surirella oblonga, K. & W. Pulp Mill. Scarce.
Surirella ovata minor, --. Cedar Grove and Pulp Mill. Scarce.
Synedra arcus, K. & W. Pulp Mill and Cedar Grove. Abundant.
Synedra obtusa, K. & W. Pulp Mill. Rather scarce.
Synedra parallelogram. --. Pulp Mill. Scarce.
Rhabdonema minuta, K. & W. Pulp Mill and Cedar Grove. Scarce.
Tabellaria sp. ?, K. & W. Pulp Mill. Very scarce.
Triblionella gracilis, K. & W. Pulp Mill. Scarce.

DESMIDACEÆ.
Cosmarium costatus, Wolle. Mill Pond. Scarce.
Cosmarium pseudobroomii, Wolle. Mill Pond. Scarce.

Land and Fresh Water Mollusca in Franklin County. 41

RHIZOPODA.

Amoeba villosa, Leidys Rhiz, N. A. Mill Pond. Scarce.
Amoeba radiosa, Leidys Rhiz, N. A. Mill Pond. Scarce.
Difflugia globulosa, Leidys Rhiz, N. A. Mill Pond. Very numerous.
Difflugia pyriformis, Leidys Rhiz, N. A. Mill Pond. Scarce.
Hyalosphenia sp. ?, --. Mill Pond. Scarce.

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