390 
BULLETIN OF THE NATURAL HISTORY SOCIERY. 
Nitschia longissima Rais. 
Nitschia plana W. S. 
Nitschia sigmoidea W. S. 
Nitschia Tryblionella Han. 
Nitschia vermicularis Hantz. 
Raphoneis Boeckii W. Sm. 
Raphoneis amphiceros Kutz. 
Rhabdonema arcuatum. K. 
Rhabdonema minutum Kutz. 
Rhizosolenia setigera Bright. 
Stauroneis phoenicenteron Ehr. 
Stauroneis aspera. 
Surirella crumena. 
Surirella elegans Ehr. 
Surirella Febigerii Lew. 
Surirella gemma Ehr. 
Surirella ovalis Breb. 
Surirella striatula Turp. 
.Synedra capitata (?) 
Synedra acuta. 
Synedra salina W. S. 
Synedra ulna Ehr. 
Synedra ulna var. longissima. 
Tabellaria fenestrata Kutz. 
Diatoms from the Vicinity of Chatham, N. B. 
Chatham is situated upon the south side of Miramichi Bay, 
the most considerable of the indentations which mark the North 
Shore of New Brunswick, receiving at its head the very con- 
siderable volume of fresh water brought down by the Miramichi 
River. It is also, in the vicinity of Chatham, of considerable 
depth and therefore in contrast with the harbor of Bathurst. 
It is for the most part bordered by low bluffs of grey sandstone, 
and the material of the bottom, as elsewhere, is largely made 
up of fine sand derived from the latter, and in these few Diatoms 
are to be found. From the scrapings of wharves and buoys, 
however, a rich harvest may be gathered, embracing the forms 
included in the following lists: — 
1. Diatoms from soundings near wharves, Chatham: 
Actinoptychus undulatus Kutz. 
Amphipleura sigmoidea W. S. 
Amphora affinis Kutz. 
Amphora lanceolata Ehr. 
Amphora obtecta H. L. S. 
Biddulphia aurita Breb. 
Campylodiscus cribrosus W. Sm. 
Coscinodiscus radiatus Ehr. 
Cocconema lanceolatum Ehr. 
Cyclotella striata Thw. 
Colletonema subcoherens Thw. 
Cymbella. 
Dickieia pinnata Ralfs. 
Epithemia turgida Ehr. 
Epithemia Hyndmani. 
Epithemia musculus Kutz. 
Grammatophora marina Kutz. 
Grammatophora serpentina Ehr. 
Hyalodiscus subtilis. 
Homoecladia sigmoidea W. S. 
Homoecladia filiformis W. S. 
Himantidium arcus W. Sm. 
Melosira varians Ag. 
Melosira nummuloides Kutz. 
