898 PROCEEDTNGS OF THE NATIONAL MVSF.VM. vouxxiv. 
antennular peduncle, the second pair reach tip of maxillipeds, the fifth 
pair extend to or be3^ond end of antennal scale. Dact3'li of third, 
fourth, and fifth pairs short, very stout, and armed with strong spines. 
Upper margin of third abdominal segment in profile smooth I3' rounded; 
posteriori}^ the segment is strongly- produced over the fourth, which 
has a spine on either side; sixth twice as long as fifth; seventh longer 
than sixth; 4 or 5 lateral spines. 
Dimensions. — Female, length 57 mm.; length of carapace and ros- 
trum 22.7 mm., of rostrum 11,5 mm. 
Type locality. — Ofi' Segouam, Aleutians, 283 fathoms, station 3480, 
U. S. Fish Commission steamer Albatross (Cat. No. 25270). 
Distrilmtion. — Bering Sea, southward and eastward to Washington, 
60 to 516 fathoms. 
SPIRONTOCARIS MAXILLIPES. 
Very near S. woseri, but distinguished as follows: Rostrum shorter, 
about four-fifths as long as carapace, teeth 5 to 8 above, 2 to below. 
The antennular peduncle reaches two-thirds or more of the length of 
the antennal scale; second segment a little longer than in S. moseri,' 
spine of basal scale scarcely reaches middle of second segment, or may 
not extend beyond first. The antennal peduncle does not reach beyond 
second segment of the antennular; scale about two-thirds length of 
carapace. More than one-half of the last segment of outer maxilliped 
extends beyond scale. No epipods on feet. Minute spinule on fourth 
abdominal somite; sixth somite one and a half times fifth; spinules of 
telson commonl}" three on each side. 
Dimensions. — Female, length 48.9 mm.; length of carapace and ros- 
trum 18.4 mm., of rostrum 8.6 mm. 
Ti/2)e locality. — ^Off Segouam, Aleutians, 283 fathoms, station 3480, 
U. S. Fish Commission steamer Albatross (Cat. No. 25271). 
Distrih(tion.—Aho taken at stations 3330, 3331, and 3338; depth, 
350 to 625 fathoms. 
SPIRONTOCARIS BRACHYDACTYLA. 
Closely allied to the three immediately preceding, hut distinguished 
from them by the short fingers of the first chelipeds, which are not 
more than a third as long as the palm. Rostrum distinctly shorter 
than carapace, 6 teeth above (1 on carapace), 3 below. No pterygos- 
tomiau spine. Like S. maxillij)es, the feet are devoid of epipods. 
Dimensions. — Length of ovigerous female, exclusive of rostrum 
and telson, 24.8 mm.; length of carapace (rostrum excluded) 7.7 mm. 
Distrihution. — Southern California, 266 to417fathoms; type locality, 
off Santa Cruz Island, 266 fathoms, station 2948, U. S. Fish Commis- 
sion steamer Albatross (Cat. No. 25272). 
