1921] Schmitt: The Marine Decapod Crustacea of California 95 
I. Group with gastric region not depressed below the general level of the carapace. 
Antennal scale with spine exceeding blade—(Continued) 
Section b. Carapace with two median spines. (For section a, see p. 84.) 
Crago communis (Rathbun) 
Crangon communis Rathbun, The Fur Seals and Fur-Seal Islands of the 
North Pacific Ocean, pt. 3, p. 556, 1899; H. A. E., 10, 123, fig. 64, 1904. 
ms Y VV 
hye BSS oe y ae: } 
hs pr? 
Fig. 63. Crago communis, 9; a, dorsal view of anterior portion, natural size; 
b, lateral view, natural size; c, acicle, X 2; d, lateral view of anterior portion of 
carapace; e, dorsal view of same, X 2; f, chela, K 2% (last four from Rathbun, 
U. 8. N. M.). 
Characters.—Third to fifth abdominal segments with a blunt median carina; 
first and second segments with a transverse sulcus; the third and fourth each 
with two transverse sulci, which are connected either side of the median carina; 
sixth segment furnished with two prominent longitudinal carinae, a median sulcus, 
and a sulcus on the outer side of each carina; the telson with a deep median 
_suleus. The abdominal sulci are filled with a short, thin pubescence, easily rubbed 
off. Second segment of antennular peduncle about twice as long as the third. 
Rostrum slender, tapering, ascending, having a median sulcus, tip rounded, 
not extending beyond the eyes. Hands over three times as long as their average 
width, anterior margin obliquely transverse. Antennal scale about two-thirds 
the length of the carapace; spine exceeding blade. 
Dimensions.—Type, female: length 64 mm., length of carapace 16 mm., length 
of antennal scale 10.5 mm. The Survey specimens ranged between 33 and 65 mm. 
in length; the average of the twenty-five specimens taken being about 40 mm. 
