138 



EXPEDITION TO POINT BAKUOYY. ALASKA. 



ANOMOUEA. 

 3. EUPAGURUS TRIGONOCHEIRUS Stimpson. 



This species was found washed up on the beach near the station in considerable abundance 

 during the months of July aud August, after the sea had opened completely. It was also' found in tho 

 gullet of Somnteria spectdbilis shot near the station. Comparatively few were dredged off Point 

 Franklin in 13 fathoms, and a few were also dredged at the head of Norton Sound in r> fathoms 

 on a pebbly bottom. 



Our series of specimens have been carefully compared with identified specimens of E.pitln 

 and E. Kriiyeri from the eastern coast (its nearest allies). The species is very closely related to /-,'. 

 Kriit/cri, but shows the following well-marked aud constant differences in the form and proportions 

 of the ehelipeds: Hand of right cheliped in Kriiyeri twice as long as broad; in trigonocheirvg, 

 generally less than twice as long as broad, often much less. Outer or right-hand margin of hand 

 in Kroyeri slightly concave ; in trigcmooheirus strongly arched, except in very large specimens, 

 almost exactly as in E. pubcst-ens. Hand of left cheliped in trlgonocheirus nearly the same as in 

 Kriiyeri, but stouter in proportion, and with the outer surface, between the keel and the margin, 

 more concave than in Kriiyeri. 



Stimpson's types of E. Mgonoclieirus appear to have been destroyed in the Chicago fire, and 

 consequently the only means we have left of identifying the species is his Latin description (loc. eit.). 

 Our species differs so much from E. Kroyeri that it must be considered at least a well-marked variet y. 



As, however, it agrees so closely with Stimpson's description quoted above, it seems preferable 

 to regard it, as Stimpsou's E. trigonocheirue, especially as Stimpson described the species Kriii/cri 

 after lie had described trigonocheirus. 



Stimpson gives as the habitat of this species, "In Oceano Arctico et in frcto Beringiano vul- 

 garis ; sublittoralis, et ad profund. 10-20 org. inventus." 



4. EUPAGURUS SPLENDESCENS (Owen). 



This species is easily recognizable by its long, slender left hand, aud the beautiful iridescent 

 colors of the carapace and claws. 



One small specimen was dredged in 15 fathoms on a muddy bottom off Point Barrow, August 

 8, 1883. Two other small ones were obtained off Point Franklin in 13i fathoms August 31, ISM;',, 

 and six good-sized individuals, four of them females bearing eggs, were dredged with the other 

 Ilermit Crabs at the head of Norton Sound in 5 fathoms, September 12, 188. 1 .. 



Dr. Leonhard Stejueger also obtained this species at the Commander Islands. 



MACKOURA. 



5. CRANGON VULGARIS J. C. Fabricius ex LinnS. 



A single specimen was dredged in f> fatliouis at the head of Norton Sound, September 12, 1883. 



