218 BULLETIN OF THE 



crest, the small size, or even absence, of the lower spine of the infero-posterior 

 angle of the carapace, the greater breadth of the antennal scale, etc. 



Gnathophausia gracilis, var. brevispinis Wood-Mason, agrees with G. dentata 

 in the obsolescence of the lower posterior spine, but I infer from Wood-Mason's 

 short description that this variety conforms to the type of G. gracilis as regards 

 the gastric teeth, antennal scale, etc. 



Length, 60 mm.; carapace, including rostrum and dorsal spine, 33 mm.; 

 rostrum, 14 mm.; dorsal spine, 4 mm. 

 Station 3361. 1471 fathoms. 1 specimen. 

 " 3375. 1201 " 1 " 



" 3400. 1322 " 1 " 



" 3406. 551 " 1 



" 3411. 1189 " 1 



Family EUCOPIID^I. 



Eucopia sculpticauda, sp. no v. 



Frontal margin very prominent, forming a three-sided blunt rostrum, which 

 projects between the eyestalks and wholly conceals the subjacent ocular seg- 

 ment. Anterior part of the telson deeply furrowed for a little less than one 

 half its length, the furrow bounded on each side by an elevated, rounded ridge; 

 a low median keel, beginning in the anterior furrow, runs back to the hind 

 end of the telson ; a constriction near the hind end divides off a terminal plate, 

 which is broadly rounded at the end, its lateral margin concave ; the whole 

 dorsal face of the telson, from the posterior end of the anterior ridges to the 

 terminal plate, is beautifully ornamented with a network of ridges like honey- 

 comb. 



Length, 66 mm.; carapace, measured from lower angle of orbit to posterior 

 end of the lateral wings, 23 mm. 



Station 2619 Hydr. 1000 fathoms. 1 female juv. 

 " 3407. 885 " 1 female.' 



" 3413. f 1360 " 1 male. 



Family MYSID-ffi. 



Petalophthalmus pacificus, sp. nov. 

 Similar to P, armiger W.-Suhm, 1 but different in some particulars. The 

 rostrum is more prominent and triangular; there is a median tooth on the 



1 Amongst the material dredged by the " Blake " in the Atlantic in 1877-78, 1 find 

 the female of P. armiger. It agrees closely with the male, barring the usual sex- 

 ual differences, viz. the presence of an incubatory pouch, and the simple structure 

 of the caudal limbs ; the mandibular palp, carapace, telson, etc., are as in the male. 

 The brood-pouch consists of six pairs of incubatory lamella?. The Schizopod 

 described by Suhm as the female of P. armiger is apparently a Boreomysis. It may 

 be called Boreomysis suhmi. 



