1898—1902. No. 18.] CRUSTACEA. at 
Remarks. — This form is very nearly related to P. longicauda 
Puiuipe1 (= Scutellidium thisboides Claus), but is of rather larger size 
and differs slightly in the general shape of the body, as also in the 
structure of the last pair of legs. The form recorded by Tu. Scott 
from Franz Josef Land as Scutelldium thisboides Cus. is in all pro- 
babilily the present species and not that of Craus. 
Occurrence. — A single fully adult female specimen and some 
immature ones of this form were found in a bottle of specimens taken 
on July 12, 1908, in the bay at Land’s End. 
Distribution. — Northern part of the Pacific together with Zaus 
Aurelii (Poppe); Franz Josef Land (Scott). 
87. Machairopus minutus, G. O. Sars. 
Some specimens of this form, described by the present author from 
the Norwegian coast, were found in 3 of the bottles. 
88. Jdyxa furcata (Bairp). 
Found rather abundantly in several of the bottles. 
89. Idy#a ensifera (FIscHER). 
Several specimens of this form were also found in the bottles. 
90. Idy#a gracilis, Scott. 
Only a few specimens of this form were found in one of the bottles 
containing specimens taken on July 12, 1900, in the bay at Land’s End. 
91. Idyea finmarchica, G. O. Sars. 
Of this species, described by the present author from the Finmark 
coast, a solitary female specimen was found in the same bottle as 
the preceding species. 
92. Idyea inflata, G. O. Sars, n. sp. 
(Pl. III). 
Specific Characters. — Female. Body comparatively short 
and stout, sub-pyriform in outline, with the anterior division greatly in- 
flated in its anterior part. Cephalic segment large and broad, obtusely 
rounded in front, with the rostral projection very slight. Epimeral parts 
1 By this slight change (the interposition of an c) I think that the Philippian 
genus may be retained. The name Idya had been previously given by 
Buainvitte to a genus of Acalephe. : 
