146 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
Cerattuum spp., and a few neritic Diatoms, e.g., 
Guinardia. The species of Chaetoceras were mostly 
unrecognisable, but Diatoms on the whole are scarce. 
| Mainly oceanic in type. | 
(2) W.S.W. of Portpatrick, 6 miles, 106 fm.; August 
Ist, 1909.—Much the same as above; zoo-plankton. 
[Oceanic in type. | 
Il. Rounp ISLAND or ARRAN. 
(1) S. of Holy Island, Arran, 54 fm.; July 3lst, 
1908.—Mostly zoo-plankton. hizosolenia in large 
numbers, also Chaetoceras boreale, C. criophilum, and 
C. decipiens. Ceratium fairly common. Also a few 
neritic forms, e.g., Chaetoceras curvisetum, Guinardia, 
and Lauderia. {Mainly oceanic in type. | 
(2) Off Cock of Arran, 76 fm.; July 27th, 1907.— 
Zoo-plankton in fair quantity, chiefly Calanus and 
Pseudocalanus. Diatoms few; Lhizosolenia semispina, 
Chaetoceras boreale, Coscinodiscus radiatus. [Oceanic 
in type. | 
(3) Off Cock of Arran, 80 fm.; July 30th, 1909.— 
Zoo-plankton in fair quantity. Diatoms numerous, both 
neritic and oceanic. Chaetoceras curvisetum is common, 
so also are CU. boreale and C. decipiens; Rhizosolenia in 
fair numbers. Ceratiwm common. [ ? Oceanic in type. | 
(4) Loch Ranza, Arran; July 27th, 1907.—A fair 
quantity of zoo-plankton. Diatoms mainly oceanic; 
Rhizosolenia common, also fair numbers of Chaetoceras 
decipiens, CU. densum, and C. boreale. Ceratium fairly 
common. [Mainly oceanic in type. | 
(5) Loch Ranza, Arran, surface; July 30th, 1903. 
Very little zoo-plankton. Diatoms chiefly oceanic; 
Rhizosolenia commonest; also Chaetoceras decipiens; 
