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. 
Ps aro, Lal. 
MenitS4005. Ws22." sic 
oo ec0G. . FOOL «mrs 
So eothl,) “Soe cc 
a 
wm 
ES 
Family HUCOPIIDZ. 
Eucopia sculpticauda, sp. nov. 
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. 
By S407, 885" 1 female. 
“3418. 1360" —-< 1 male. 
Family MYSIDZ. 
Petalophthalmus pacificus, sp. nov. 
Similar to P. armiger W.-Suhm,! 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, I 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 lamelle. The Schizopod 
described by Suhm as the female of P. armiger is apparently a Boreomysis. It may 
be called Boreomysis suhme. 
