134 RATHBUN 
Cape Etolin, Nunivak Island, 8 fathoms (W. H. Dall). 
Various localities in the Aleutians and Alaska Peninsula, 6-28 fathoms 
(W. H. Dall). 
SCLEROCRANGON ALATA Rathbun. 
Plate 11, fig. 2. 
Sclerocrangon alata RATHBUN, Proc. U. S. Nat. Mus., xxIv, 891, 1902. 
Allied to S. doreas. Carapace only slightly broader than long; surface 
very uneven, sculptured and pitted. Median carina armed with a small 
spine just behind 
the orbits, a still 
smaller one at 
the middle of the 
carapace, and a 
tubercle near the 
posterior mar- 
gin. Rostrum 
with an acute 
Fic. 72. Sclerocrangon alata. % (X 2). Station 2865. @. Dorsal view of upturned and 
carapace and abdomen. 4. Side view ef carapace. curved tip. A 
spine at the outer angle of the orbit. Antero-lateral angles broadly 
alate. Branchial carina having a strong anterior spine; posterior half 
protuberant and deeply pitted, as is also the surface below the crest. 
The spine of the antennal scale extends as far as or a little farther than 
the blade. 
The first pair of feet have a strong upper distal spine on the merus, a 
large outer dentiform expansion on the carpus, and a 
very short stout hand less than twice as long as broad, « 5 
the anterior margin nearly transverse and the spine nearly 
longitudinal. 
The abdomen is sculptured. ot eee 
The median carina of the first five segments is very eae eee ee 
blunt, and on the third segment especially prominent. % Acicle. 4. Chela. 
The pleura are without spines. The lateral spinules (one or two pairs) 
on the telson are situated at about its middle. 
Dimensions.— Male, length 38 mm., length of carapace 11 mm., width 
of carapace at branchial spine 10.7 mm., length of hand 4.4 mm., width 
of hand 2.5 mm. A female 25.7 mm. long is laden with ova. 
Distribution, —¥From Bering Sea to Puget Sound, 6-91 fathoms. 
Usually not more than one or two specimens in a haul. 
Taken at the following localities by the 4/atross: 

