NO. 1272. NEW DECAPOD CR IJSTA CEANS—RA THE UN. 895 
in :i sinolc sharp spine; teeth 6 to 8 above, 3 to 4 below. Last three 
pairs of thoracic feet long-er and more slender than in S. ocliotensk; 
sixth abdominal segment longer, being more than one and a half times 
as long as the fifth segment. 
Dimensions. — Female, approximate length 38 mm., length of cara- 
pace and rostrum 13.6 mm., of rostrum 6 mm. 
Type locality. — Coal Harbor, Unga Island, Alaska, 8 to 9 fathoms, 
W. H. Dall, collector (Cat. No. 25262). 
Distrihution. — Alaska, (5 to 20 fathoms. 
SPIRONTOCARIS UNALASKENSIS. 
Agrees with S. i^olaris (Sabine) and differs from all other species 
which possess a supraorbital spine, in the maxilliped l)eing without an 
exognath, while it and the first two pairs of feet are provided with an 
epipod. Female: Posterior median spine of carapace situated at the 
anterior third (rostrum excluded). Rostrum longer than acicle, dorsal 
spines 4 or 5, 2 on carapace and 2 or 3 at base of rostrum; no upper 
limb on distal portion, lower limb shallow, convex, 3-spined in front 
of middle. Eyes large, pyriform. Third segment of antennules less 
than half as long as second. Antennal peduncle extending nearly to 
end of second segment of antennular peduncle. Hinder portion of 
third abdominal segment verj^ prominent; sixth segment about one 
and two-thirds times as long as fifth. 
Dimeyisions. — Female, length 60 mm., carapace and rostrum 26.5 
mm., rostrum 14.5 mm. 
Tyjye ''ocality. — North of Unalaska, 350 fathoms, station 3331, U. S. 
Fish Commission steamer Albatross (Cat. No. 25263). 
SPIRONTOCARIS VICINA. 
Allied to the preceding; second foot without an epipod. 
Female. — Dorsal spines 7 or 8 (2 on carapace), the anterior not very 
near tip of rostrum; inferior spines 4. Second segment of antennular 
})eduncle al)out three times as long as third; basal scale falls consider- 
abl}' short of second joint of peduncle. Antennal peduncle does not 
reach middle of second segment of antennular peduncle. 
Dimensions. — A female with rostrum and telson incomplete meas- 
ures 39 mm. from the orbit to the end of the sixth abdominal somite. 
Ty2}e locality. — North of Unalaska, 309 fathoms, station 3316, U. S. 
Fish Commission steamer Albatross (Cat. No. 25264). 
SPIRONTOCARIS WASHINGTONIANA. 
Female. — Posterior median spine at anterior fourth of carapace 
(rostrum excluded). Rostrum slender, half as long as carapace, nearly 
horizontal, slightl}' sinuous, dorsal spines 4 (2 on carapace), 3 teeth 
below on anterior third. Second segiuent of antennular peduncle 
