96 



University of California Publications in Zoology [Vol. 23 



Type Locality. — Off Pribilof Islands, Bering Sea, 51 fathoms ("Albatross" 

 station 3441). 



Distribution. — Bering Sea to San Diego, California, 9 to 309 fathoms. 



Remarks. — The rostrum in normal individuals does not extend beyond the 

 eyes; in many eases, however, it is evident that the rostrum has been broken off 

 or injured and later renewed, the new rostrum having a narrow, elongated, and 

 ascending tip, exceeding the eyes but of variable length. In other respects these 

 abnormal forms do not differ from the types (Bathbun). 



Biological Survey of San Francisco Bay. — Crago communis was 

 taken only at the most distant as well as the deepest of the outside 

 stations, D 5788 ; twenty-five specimens in 60 to 68 fathoms ; tempera- 

 ture 9.3° to 11.3° C; salinity 34.0 to 34.2. Crago resima also was 

 recorded from this station only; both C. alaskensis elongata and 

 C. spinosissima were also taken here. 



Crago resima (Rathbun) 



Crangon resima Bathbun, Proc. U. S. Nat. Mus., 24, 

 10, 124, fig. 65, 1904. 



1902; H. A. E., 



-7' 



bed 



Big. 64. Crago resima, 5; a, acicle, X 3%; b, lateral view of anterior portion 

 of carapace, X 2%; c, dorsal view of same, X 2; d, chela, X 4 (from Bathbun, 

 U. S. N. M.). 



Characters. — The first five abdominal segments are smooth, the first and second 

 segments have a thickened band along the posterior margin, in front of which 

 there is a slight transverse depression; the fifth segment has an obscure median 

 carina, with a short depression on either side at the anterior end ; the sixth segment 

 has two prominent carinae and a corresponding median depression; the telson has 

 a slight median sulcus. Eyes of moderate size. Second segment of antennular 

 peduncle three times as long as the third. Bostrum long, narrow, pointed, 

 advanced beyond the eyes, ascending at an angle of about forty-five degrees, 

 slightly curved, and prolonged downward in a thin, compressed plate, which appears 

 spatulate in a side view. The development of this plate is dependent on age; 

 specimens 20 mm. long show no evidence of it. Hands shorter than in C. com- 

 munis, about three times as long as wide, anterior margin also more longitudinal 

 than in C. communis. Antennal scale about four-fifths the length of the carapace 

 exclusive of the rostrum, spine exceeding blade. 



