190 C. Spence Bate on the Peneidea. 
Pleurobranchia .........+0- cae ds er Wey Pee ee Beery JL 
Arthrobranchigz..........0+ ED ie YD TS aes 
Podobranchia..........-+9. TAS tf Ea Wee é 
Mastibranchia ...........+ aS “a eal ae oes 
htktmun oo 
Hepomadus glacialis, n. sp. 
Dorsal surface of the carapace elevated into a carina that 
terminates at the cardiac region. Pleon armed with one large 
tooth at the dorsal median posterior margin on the third 
somite, and one little one on the fourth and fifth. Ophthal- 
mopod long, furnished with a small tubercle near the base on 
the inner side. Eye small, not much larger than the dia- 
meter of the stalk. 
Length about 8 inches (female). 
Taken in mid South Atlantic at a depth of 1875 fathoms. 
Hepomadus inermis, ni. sp. 
Dorsal surface unarmed. Pleon smooth. Telson not half 
the length of the outer plate of the rhipidura.. Rostrum 
(broken off). — 
Length about 4 inches. , 
Taken in middle of South Pacific at a depth of 2550 fathoms. 
Genus BENTHESICYMUS, n. g. 
Structure of the integument submembranous. Rostrum 
short, compressed, crested. Ophthalmopod flattened, furnished 
with a conspicuous tubercle or secondary eye. Hye not large. 
First pair of antennee with the flagella subequally long, the 
upper more robust than the lower, not longer than the cara- 
pace. Mandible carrying a two-jointed appendage, second joint 
short and pointed. Second pair of gnathopoda terminating 
in a sharp-pointed dactylus. Pereiopoda long, slender, feeble. 
Branchie with the uitimate branches longer than in Peneus, 
and arranged as in the following Table :— 
Pleurobranchia ............ Pose cae] lige eer eM TT 
Arthrobranchisz............ DEON sD OTe ens 
Podobranchia.......0...++: Dislike 
Mastibranchia ............ We ed ole al 
htkhk2tlmnio 
Benthesicymus crenatus, n. sp. 
Rostrum straight, pointed, dorsally elevated into a laterally 
compressed crest, armed with three small teeth, and one 
behind the crest on the gastric region. Cervical suture 
deeply fissured. Posterior margin of the fourth somite of the 
