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 ^,^ cj.- , ■ -n-j. „ c. • o c-., , . 



t IG. 40. Spirontocans maxilhpes. 9 . Station 3480. a. Side ( X 2). 

 is reduced to an almost ^- 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 chelae 

 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. 



Spiro7itocaris brachydactyla RATHBUN, Proc. U. S. Nat. Mus., XXIV, 898, 

 1902. 



This species is closely allied to S. moseri and S. maxillipes, 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- 



