904 PROCEEDINGS OF THE NATIONAL MUSEUM voi.xxiv. 
Family OPLOPHORID^E. 
HYMENODORA FRONTALIS. 
Surface covered with very line wrinkles or rugose lines. Rostrum 
from two-fifths to one-half as long- as remainder of carapace, reaching 
end of antennular peduncle; it is a slender sharp-pointed spine, distal 
half slightly curved upward, basal half armed above with from 3 to 6 
small spines (2 or 3 on carapace). Antennular spine minute; antennal 
spine strong; from it a sharp carina runs back subparallel to the side 
margin and quite to the posterior margin. A blunt ridge on the 
branchial region. A deep groove extends obliquely downward and 
backward from the orbital sinus nearly to the lateral carina. Eyes 
without pigment, with a slender blunt spine on inner margin. Anten- 
nal scale lanceolate; peduncle reaching end of first antennular seg- 
ment. Abdomen devoid of a median carina or median spines; sixth 
somite 2^ times as long as fifth and between three-fourths and four- 
fifths as long as telson. 
The unusually long rostrum distinguishes this from other species of 
Ilyinenodora. 
Dimensions. — Male, length of carapace and rostrum 19 mm., of 
rostium 6.5 mm., of abdomen 32.5 mm. 
Type locality.— y^^^i of Unalaska, 322 fathoms, station 3327, U. S. 
Fish Commission steamer Albatross (Cat. No. 25284). 
DiMrihution. —From Bering Sea and Kamchatka to off Monterey 
Bay, California, 322 to l,7Tl fathoms. 
Family PASIPH^EID.E. 
PARAPASIPH.^ SERRATA. 
Allied to p. gilesii Wood-Mason. Carapace and rostrum as long as 
first five abdominal somites. The median carina extends backward to 
the posterior fifth of the carapace and forward along the high thin 
rostrum, which extends to middle of eyestalks; carina a little concave 
at middle of carapace, anteriorly sloping downward and armed with 
16 small teeth or spines, two of which are on the rostrum and one is 
terminal; below this spine the rostrum is a compressed finely crenulate 
lobe. Antennular scale ii,s long as basal joint of peduncle. Antennal 
scale nearly half as long as carapace proper. Fingers of first pair of 
feet equal to palm in length; third pair (tip broken off) equal to cara- 
pace exclusive of rostrum; fourth and fifth pairs have the terminal 
joint narrow-oval, fifth pair the longer and two-thirds the length of 
carapace. First three abdominal somites noncarinate, fourth termi- 
nating in a thin compressed spine. 
DimenMons. — Egg-laden female, length of carapace and rostrum 
23.6 mm., rostrum 1.8 mm., abdomen -±2 mm. 
