PLANKTON OF THE WOODS HOLE REGION 145 
During the past year 42 species of free-swimming copepods appeared in the 
surface collections taken from the end of the Fisheries dock. Of these, 19 belong 
to the tribe Gymnoplea and 22 to the tribe Podoplea. In Sharpe’s list 12 species 
from this region belong to the Gvmnoplea. The list for this tribe. I believe, is 
July 
Sept 
Apre 
g g 
June 
Augs 
Octe 
Nove 
Dece 
Jane 
Feb. 
falanus finmarchious 
Psendocalanus elongatus 
Immature P.elongatus ff : ; : 
Paracalanus parvus 
Centropages typicus = s oo 
Centropeges hematus : 
Immature Cehematus 
femora longicornis. 
Eurytemora herdmani : t 
Eurytemora hirundoides 
Metridia lucens 
P.coronatus 
Iabidocera destiva 
Pontella meadii 
Anomalocera patersont 
Acartia tonsa 
Acartia clausii : 
Acartia longiremis 
Acartis bifilosa 
Tortams discandata 
Oithona similis 
Hicrosetella rosea 
Microsetella norvegica HEH 
Setella gracilis Seine 
Thaumsleus claparedii 
Harpacticus chelifer HH 
Harpacticus uniremis 
Altentha depressa fener 
Parategastes sphaericus 
Idya furcata f 
Dactylopusia vulgaris 
Tachidius brevicornis 
Asphiascus obscurus 
Parawestwoodia minuta 
Longipedia coronatus 
Tlyopsyllus sarsi 
Fic. 46,—Occurrence of Copepoda in surface collections from June, 1922, to May, 1923. (Oithona brevicornis 
is not distinguished from 0. similis) 
now fairly complete. The Podoplea, however, have scarcely been touched and will, 
no doubt, yield many more species when carefully studied. Twelve species taken in 
1922-23 are new to the Woods Hole region. I have not listed as new any forms 
previously recorded from Narragansett Bay. 
