DECAPODS 93 
ment, or may not extend beyond the first segment. The antennal peduncle 
does not reach beyond the second segment of the antennular; the scale 
is shorter, about two 
thirds the length of the 
carapace ; more than one 
half of the last segment 
of the outer maxilliped 
extends beyond the scale. 
The feet are without epi- 
pods; the first pair reach 
the end of the scale or 
extend beyond it. 
The spine of the 
fourth abdominal somite Fic. 40. Spzrontocaris maxillipes. %. Station 3480. a. Side (X 2). 
is reduced to an almost 4, Dorsal view of anterior portion (X 2). c. Chela of first pair (x 4). 

imperceptible spinule; the sixth somite is shorter than in \S. moseri, being 
only one and a half times the fifth; the side spinules of the telson are 
commonly 3 in number, occasionally 4. 
In this, as well as in the preceding species, the fingers of the first chelz 
are a little over half as long as the palm. 
Dimensions.— Female, length 48.9 mm., length of carapace and ros- 
trum 18.4 mm., of rostrum 8.6 mm. 
Distribution.— Aleutian Islands, 283 to 625 fathoms, at the following 
Albatross stations: 
Off Seguam, 283 fathoms, station 3480 (type locality). 
North of Unalaska, 351 and 350 fathoms, stations 3330, 3331. 
Off Shumagin Bank, 625 fathoms, station 3338. 
SPIRONTOCARIS BRACHYDACTYLA Rathbun. 
Spirontocaris brachydactyla RATHBUN, Proc. U. S. Nat. Mus., xxIv, 898, 
1902. 
This species is closely allied to S. moseri and S. maxillifes, but is dis- 
tinguished by the short fingers of the first chelipeds, which are not more 
than a third as long as the palm. 
There are two specimens in the collection. The rostrum is distinctly 
shorter than the carapace, and, in the one specimen in which it is perfect, 
is armed with 6 teeth above (one on the carapace) and 3 below. No 
pterygostomian spine. Antennular peduncles reaching a little over half 
the length of the antennal scale, second segment very little longer than 
third; antennular scale reaching slightly beyond the first segment in the 
larger specimen, shorter than first segment in the smaller specimen; thick- 
