132 RATHBUN 



anterior has an acuminate, the other a spiniform, tip. The third to fifth 

 segments of the abdomen are carinated; the anterior pair of lateral 

 spinules of the telson are two fifths the distance from the tip. 



Dimensions. Female, length of body 35.4 mm., length of carapace 

 10.5 mm., of scale 4.4 mm., of hand 5.2 mm., width of hand 1.8 mm. 

 Male, length of body 33 mm., length of carapace 1 0.3 mm., of scale 3.9 mm. 



Distribution, Bering Sea and off the Aleutian Islands, 276-625 

 fathoms, as follows : 



North of Rat Islands, 270 fathoms (Albatross station 3785). 

 South of Pribilof Islands, 276 fathoms (Albatross station 3608). 

 Off Iliuliuk Harbor, Unalaska, 309 fathoms (Albatross station 3316). 

 North of Unalaska, 350-406 fathoms, stations 3329 (type locality) to 



333 2 - 

 Off Shumagin Bank, 625 fathoms, station 3338. 



CRANGON MUNITELLA Walker. 



Crangon munitellus WALKER, Trans. Liverpool Biol. Soc., xn, 275, pi. xvi, 

 fig. i, 1898. Puget Sound. HOLMES, Occas. Papers Calif. Acad. Sci., 

 vn, 176, 1900. 



This species is related to C. munitus, but differs from it and all its allies 

 in having the second lateral carina from the middle armed with a spine a 

 little behind the superior lateral spine. The distance between the two 

 median spines is equal to the distance between the posterior of these 

 spines and the posterior margin. The antero-lateral angle of the cara- 

 pace is armed with a spine. The end of the blade of the antennal scale 

 is so produced at the inner angle that it is more advanced than the spine 

 at the outer angle. The first four abdominal segments are smooth ; the 

 fifth has a carina faintly indicated ; the sixth has a broad, smooth carina 

 set off by a depression on either side; the seventh has a slight median 

 depression. The hands of the first pair of feet are two and a half times 

 as long as wide, oblong, swollen, the anterior margin more longitudinal 

 than transverse, spine very long. 



Dimensions. Female with eggs, length 25 mm., length of carapace 

 7 mm. 



Distribution. Puget Sound (Walker, Caiman; also collected by T. 

 Kincaid) ; Pacific Grove, California (J. O. Snyder) ; Catalina Harbor, 

 California, 30-40 fathoms, sandy mud (W. H. Dall). 



Genus Sclerocrangon Sars. 



KEY TO THE SPECIES OF SCLEROCRANGON. 



A. A long suberect spine situated ori the rostrum ; four spines on median 

 carina sharpi. 



