100 University of California Publications in Zoology  [Vou. 238 
Crago spinosissima (Rathbun) 
Crangon spinosissima Rathbun, Proc. U. 8. Nat. Mus., 24, 891, 1902; 
H. A. E., 10, 130, fig. 70, 1904. 
Pe 
o~— 
a b 
Fig. 69. Crago spinosissima, 9, X 2; a, dorsal view of carapace; b, lateral 
view of carapace and abdomen (from Rathbun, U. 8. N. M.). 
Characters.—First to fourth abdominal segments more or less carinated. 
Anterior median spine of the carapace reaching forward to a line in front of 
the rear line of the orbits. Rostrum narrow and acute, ascending at an angle 
equal to that of the spine directly behind it. Hands about three times as long 
as wide. This species differs from all allied species in having the first to third 
abdominal segments, inclusive, armed laterally with two spines each. 
Dimensions.—Type, female: length 36 mm., length of carapace 10.5 mm. The 
Survey specimens range between 28 and 48 mm. in length from tip of rostrum 
to end of telson. 
Type Locality — Off Point Arena, California, 51 fathoms (‘‘ Albatross’’ station 
3351). 
Distribution.—Off Oregon and California, 15 to 96 fathoms. So far as known 
Point Fermin is the southern limit of this species. I have seen specimens collected 
there by the Venice Marine Biological Station, at a depth of about 15 fathoms. 
Biological Survey of San Francisco Bay.—Crago spinosissima was 
taken at two of the outside stations: two specimens at D 5788, 60 to 
68 fathoms, and three specimens at D 5789, 33 to 46 fathoms. The 
bottom of both stations was ‘‘fine, green sand’’; the temperature range 
was 9.3° to 11.4° C; and that of the salinity 33.8 to 34.3. At the 
deeper of these stations, D 5788, at which, in fact, the greatest depth 
recorded in the course of the survey, 68 fathoms, was attained, the 
species in question was found associated with both C. communis and 
C. resima, as well as C. alaskensis elongata. 
Crago lomae, sp. nov. 
Plate 12, figures 3 and 4 
Description.—Near C. spinosissima, with spines of carapace similarly placed, 
anterior median spine equaling or exceeding rostrum in prominence, more acutely 
pointed, and more nearly erect, at an angle of about sixty-five degrees with the 
carapace, while the rostrum meets the carapace at an angle nearer forty-five 
degrees; midway between anterior and posterior spine there is a small denticle 
on the median carina; surface of the carapace is roughened with minute 
