426 
BULLETIN OF THE BUREAU OF FISHERIES 
C. May 13, 1915, station 10277: 53 
Diatoms very abundant. 
Thalassiosira nordenskioldi dominant. 
Thalassiothrix longissima abundant. 
Chsetoceras contortum. 
Ch. debile. 
Ch. decipiens. 
Ch. didymum. 
4. — Neae 
A. March 3, 1920, station 20056: 54 
Diatoms scarce. 
Lauderia glacialis dominant. 
Coscinodiscus sp.? 
Chsetoceras decipiens. 
Ch. didymum. 
Ch. atlanticum. 
E. May 11, 1915, station 10275: 
Diatoms very abundant. 
*Thalassiosira nordenskioldi nearly 100 
per cent of the catch. 
*Biddulphia aurita. 
Chsetoceras debile. 
♦Ch. decipiens. 
*Ch. diadema. 
♦Rhizosolenia setigera. 
*.Thalassiosira gravida. 
(A scattering of each.) 
C. June 11, 1915, station 10285: 
Diatoms abundant. 
*Thalassiosira nordenskioldi dominant. 
*Chsetoceras contortum dominant. 
*Ch. debile dominant. 
Chsetoceras constrictum. 
Ch. decipiens. 
*Ch. furcellatum. 
♦Ch. laciniosum. 
*Ch. scolopendra S. 
♦Ch. teres. 
Ch. sp.?. 
♦Coscinodiscus concinnus. 
Coscinosira polychorda. 
Lauderia glacialis. 
♦Rhizosolenia semispina. 
*R. setigera. 
♦Thalassiosira gravida, 
ss Not examined by Doctor Mann. 
3« Not examined by Doctor Mann. 
55 On Aug. 21, 1912, Asterionellajaponica was nearly 100 per 
C. May 13, 1915 — Continued. 
Ch. laciniosum. 
Coscinosira polychorda. 
Ditylium brightwellii. 
Lauderia glacialis. 
Rhizosolenia semispina. 
R. setigera. 
Thalassiosira gravida. 
Thalassiothrix nitschioides. 
' Desekt Island 
D. July 19, 1915, station 10302: 
Diatoms in medium abundance. 
♦Thalassiosira gravida dominant. 
*Chsetoceras scolopendra abundant. 
*Rhizosolenia setigera abundant. 
♦Chsetoceras contortum. 
Ch. debile. 
*Ch. decipiens. 
♦Coscinodiscus asteromphalus. 
♦Nitschia seriata. 
♦Rhizosolenia alata. 
♦Thalassiosira decipiens. 
♦Thalassiothrix nitschioides. 
E. August 14, 1914, at a locality off the mouth of 
Penobscot Bay, station 10250: 
Diatoms abundant, with many Cera- 
tium. 
♦Chsetoceras criophilum dominant. 
Ch. constrictum dominant. 
♦Ch. decipiens dominant. 
♦Ch. diadema dominant. 
♦Ch. scolopendra dominant. 
♦Chsetoceras debile. 
♦Ch. densum. 
♦Ch. laciniosum. 
♦Ch. peruvianum. 
♦Corethron valdiviae. 
♦Licmophora jurgensii. 
♦Nitschia seriata. 
♦Rhabdonema arcuatum S. 
♦Rhizosolenia setigera. 
♦Skeletonema costatum. 
♦Thalassiosira gravida. 
♦Th. nordenskioldi. 
F. September 15, 1915, station 10317: 65 
Diatoms in medium abundance. 
♦Thalassiosira gravida dominant. 
ent of the very abundant phytoplankton in this region (p. 431). 
