COPEPODA FROM IFALUK ATOLL 175 



though faded, can still be made out. Cephalic somite and abdomen 

 transparently yellowish, thoracic somites 2 to 5 reddish brown. 



Remarks. — This is an exceedingly rare species. It was based 

 originally on a single female specimen, 0.5 mm. in length, from 

 Salcombe, Devon, on the English Channel coast (Norman and T. 

 Scott, 1905; 1906). Sewell (1940) records another female (0.38 mm. 

 length) from off Burleigh Rock on Nancowry in the Nicobar Islands, 

 where it was obtained from weed washings. The Ifaluk specimens 

 also were obtained from weed washings. 



Genus Dactylopodella G. O. Sars, 1905 



The type of the genus Dactylopodella (=Vallentinia Norman and 

 T. Scott, 1906) is Dadylopus flavus Claus, 1866. The following 

 species are known: 



Females Males 



Dadylopus flavus Claus, 1866 D. flavus Claus, 1866 



D. rostratus T. Scott, 1893 D. rostratus T. Scott, 1893 



Dactylopusia ornata Norman and T. D. ornata Norman and T. Scott, 1905 



Scott, 1905 

 Dactylopodella clypeata G. O. Sars, 



1911 



A new species will be described below as Dactylopodella incerta, 

 new species, of which the female only is known. This species can be 

 fitted into Lang's key in the following way: 



Key to Species of Daclylopodella 



1. Endopodite of leg 1, 2-segmented 2 



Endopodite of leg 1, 3-segmented D. rostra ta (T. Scott) 



2. 2nd endopodal segment of leg 1 with geniculate seta and claw. 



D. ornata (Norman and T. Scott) 

 2nd endopodal segment of leg 1 with 2 claws 3 



3. Endopodite leg 2, 3-segmented D. incerta, new species 



Endopodite of leg 2, 2-segmented 4 



4. Abdomen J-^ the length of cephalothorax D. flava (Claus) 



Abdomen Yz the length of cephalothorax . . . . D. clypeata G. O. Sars 



Dactylopodella incerta, new species 



Figures 64a, 6, 65 



"I") 



Material. — Loc. 592, 2 ov. 9 9, 0.44 and 0.48 mm., 1 ad. 9, 

 0.44 mm. 



Description. — The following is based on the ovigerous female 

 specimen of 0.44 mm. length (holotype), which has been dissected 

 and the appendages mounted. The remaining specimens are the 

 paratypes. 



