

- y I 



PENEOPSIS DIOMEDE^. 



187 









i 



V 



^ 



The legs are of moderate length for this family; they increase in length 

 in successive order from the first pair to the last. 



The abdominal appendages are very long. Their proportions will be best 

 understood by reference to the figure. 



The exopods of the second maxillipeds are very small; — not longer than 

 the short ischial segments of these limbs. Upon the appendages behind 

 these, the exopods are reduced to the merest rudiments, to be detected only 

 by the use of a lens. In some specimens, indeed, the exopods of the pos- 

 terior appendages are altogether wanting. 



The branchial formula is as follows : — 



Somites 



VII. 



Plcurobrancliias 

 Art]irobranchia3 1* 



Podobrancliioe 

 Epipods 





 1 



VIII 





 2 

 1 



1 



IX. 



1 



2 

 

 1 



X. 



1 

 2 

 

 1 



XT. 

 1 



2 

 

 1 



XIT, 

 1 



2 

 

 1 



XIIT. XIV. 



1 



2 

 

 1 



1 



6 



0= 13 





 



1 



m 



20 + (7) 



Length (female) 215 mm.; carapace, 101 mm.; rostruiU; 42 mm. ; anten- 

 nal scalcj 33 mm. ; tclson, 33 mm. 



Station 3353. 695 fixthoms. 2 fem. 



a 



a 



a 



(I 



a 



3358. 

 3384. 



555 

 458 



3393. 1020 



3394. 

 3395. 



511 

 730 



ic 



u 



a 



a 



<i 



1 male. 

 3 fem. 



3fei 



in 



3 males, 1 fem. 

 1 male, 1 fem. 



^ 



I have assigned this species to the genus Pcticopsis after some hesitation. 

 Peneopsis, a MS. name of A. Mihie Edwards's adopted by Spence Bate, has 

 never been properly characterized. According to Bate, it was separated 

 from Pencils chielly on account of the length of the antennular flagella, 

 which surpass the carapace in length. I luive examined with some care a 

 specimen in this Museum from the " Blake " collection, labelled " Pencopis 



iris" by A. Milne Edwards, In this specimen the cervical sulcus is 

 deeply imprinted upon the surface of the carapace, but the posterior oblique 

 portion of the conspicuous groove which runs from the cervical groove to 

 the hinder part of the carapace in P. dmnedcm is obsolete. There is a 

 very minute supra-orbital spine on the anterior margin of the carapace, 

 a strong antcnnal spine at the lower limit of the orbit, a small spine (hepatic?) 



*^ Very niiuuie, but functional. 







h 



t?- 





