1921] Schmitt: The Marine Decapod Crustacea of Califorma 97 
Dimensions.—Type, ovigerous female: length 48.3 mm., length of carapace 
12.2 mm., of antennal scale 8.2 mm. The three specimens taken in connection 
with the Survey averaged 38.5 mm. in length from tip of rostrum to end of 
telson. 
Type Locality —Off San Diego, California, 124 fathoms (‘‘ Albatross’’ station 
2935). 
Distribution—From off San Francisco, California, to San Domingo Point, 
Lower California, 15 to 266 fathoms. 
Biological Survey of San Francisco Bay.—Three specimens of 
Crago resima were taken at D 5788, associated with Crago commums, 
C. alaskensis elongata and C. spinosissima (see C. communis, above). 
Crago abyssorum (Rathbun) 
Crangon abyssorum Rathbun, Proe. U. 8. Nat. Mus., 24, 890, 1902; H. A. E., 
10, 125, fig. 66, 1904. 
, 
a b c d 
Fig. 65. Crago abyssorum, 2; a, antennal scale, X 2; b, lateral view of rostrum 
and dorsal spines, X 2; c, dorsal view of anterior part of carapace, X 2; d, 
chela, X 3%. 
Characters—The fifth abdominal segment has a long, blunt carina; the sixth 
has two prominent dorsal carinae and a low lateral carina on each side near the 
dorsal, but extending only half the length of the segment; the telson has a median 
furrow on its anterior fourth. Eyes very large, hemispherical, their inner faces 
flat and contiguous; cornea covering nearly all the outer face. Second segment 
of antennular peduncle about one and a half times as long as the third. Rostrum 
linear, flattened above, acute, ascending at an angle of about thirty degrees with 
the carapace, and slightly curved, a little higher than wide, the lower part laterally 
compressed; length about one-fourth the remainder of the carapace. Hands 
widening a little distally, their length three times the width, measured at the 
inner base of the spine; the dactylus is more longitudinal than transverse. The 
antennae have a slender spine at the outer base of the scale, which is narrow- 
oblong and three-fourths as long as the carapace, rostrum excluded. 
Dimensions.—Type, female: length 61 mm., of carapace and rostrum 17 mm., 
of carapace, exclusive of rostrum, 13.5 mm., of antennal scale 10.3 mm. 
Type Locality—Bering Sea, southwest of Pribilof Islands, 1771 fathoms 
(‘* Albatross’’ station 3603). 
Distribution—Bering Sea to the southern extremity of California, 685 to 1771 
fathoms (Rathbun). 
