BULLETIN OF THE BUREAU OF FISHERIES 
424 
D. Off Gloucester, March 1, 1920 — Continued. 
*Chsetoceras atlanticum. 
*Ch. constrictum. 
*Ch. criophilum. 
Ch. debile. 
Ch. diadema. 
*Ch. didymum. 
*Coscinodiscus concinnus. 
*C. curvulatus. 
*Lauderia glacialis. 
*Nitschia seriata. 
E. Off Gloucester, April 9, 1920, station 20090 : 50 
Diatoms very abundant. 
*Chsetoceras debile dominant. 
*Thalassiosira nordenskioldi dominant. 
*Chsetoceras contortum abundant. 
*Ch. decipiens abundant. 
*Ch. furcellatum abundant. 
*Biddulphia aurita. 
*Cha3toceras atlanticum S. 
*Ch. criophilum. 
*Ch. densum. 
*Ch. diadema. 
*Ch. scolopendra. 
*Ch. willei. 
*Coscinodiscus asteromphalus. 
*Fragilaria cylindrus. 
*Navicula sp. (?) S. 
*Rhizosolenia semispina. 
R. setigera. 
2. — Neighborhood of 
A. March 4 and 5, 1920, stations 20060 and 
20061 combined: 
Diatoms very abundant. 
*Chsetoceras contortum dominant. 
*Ch. diadema dominant. 
*Thallassiosira gravida dominant. 
*Th. nordenskioldi dominant. 
*Biddulphia aurita. 
*Chsetoceras atlanticum. 
*Ch. criophilum. 
*Ch. debile. 
*Ch. decipiens. 
*Ch. didj'mum. 
*Ch. laciniosum. 
*Ch. sociale. 
*Ch. teres. 
*Coscinodiscus asteromphalus. 
30 The list of diatoms for a haul in the inner part of the bay 
*Chaetoceras laciniosum* Ch. sociale, and *Ch. teres, likowise Rhizos 
Coscinodiscus, Fragilaria, and Rhizosolenia styliformis. 
E. Off Gloucester, April 9, 1920 — Continued. 
*R. styliformis. 
*Thalassiosira gravida. 
*Thalassiothrix nitschioides. 
F. August 24, 1922, station 10635: 
Diatoms moderately abundant. 
Skeletonema costatum dominant. 
Rhizosolenia alata. 
(Skeletonema costatum and Rhizo- 
solenia alata together constituted 
nearly 100 per cent of the diatoms.) 
Chtetoceras decipiens S. 
Chaetoceras sp. (?) S. 
G. August 24, 1922, station 10640: 
Diatoms moderately abundant; many 
Ceratium. 
Rhizosolenia alata nearly 100 per cent 
of the diatoms. 
Skeletonema costatum. 
H. October 1, 1915, station 10323 (near Cape 
Cod): 
Diatoms in medium abundance. 
*Skeletonema costatum nearly 100 per 
cent of the diatoms. 
*Chsetoceras decipiens S. 
*Coscinodiscus sp. (?) S. 
*Rhizosolenia shrubsolei S. 
the Isles of Shoals 
A. March 4 and 5, 1920 — Continued. 
*C. concinnus. 
*C. curvulatus. 
*C. excentricus. 
*C. radiatus. 
*C. subtilis. 
*Detonula cystifera. 
*Ditylium brightwellii. 
*Lauderia glacialis. 
*Melosira borreri S. 
*Nitschia seriata. 
*Pleurosigma stuxbergii. 
*Rhizosolenia semispina. 
*R. setigera. 
*Stephanodiscus astrea S. 
*Skeletonema costatum. 
*Thalassiosira baltica. 
*Thalassiothrix nitschioides S. 
n Apr. 6, 1920 (station 20089) is the same except that it includes 
enia setigera and *Thalassiosira subtilis, but lacks Ch.furcellatums . 
