DECAPODS 11g 
Rostrum long, narrow, grooved above, tapering to a narrow-acute tip 
which is curved strongly downward and much compressed laterally. There 
is no median gastric spine; but with a lens one can discern a scabrous 
granule in the spot where the spine usually occurs. The antennular pe- 
duncle has shorter segments than in C. alba, to which 
this species is nearly related ; outer branch of flagellum 
as long as, or longer than, the blade of the antennal 
scale. Antenne shorter than the body. Scale shaped _ Fic. 59. Crangon sty- 
as in C. aléa, but much shorter, being only a little over Gunceriaeaa 2 
half as long as the carapace. Maxillipeds with the antepenult segment 
outwardly dilated as in C.a/ba. The hands are slightly widened distally, 
shorter and broader than in C. a/ba, the length being barely twice the 
width; the anterior margin is more transverse than longitudinal. Second 
pair of feet more slender and a little longer than the third. 
Abdominal segments smoothly rounded above, not carinated; sixth 
segment not sulcated below; seventh segment a very little longer than 
the sixth. The uropods extend considerably beyond the telson. Each 
segment in the male bears a median spine on the ventral side. 
Dimensions.—Length of female 54 mm., of carapace 15.1 mm., of 
acicle 9.1 mm. 
Distribution.—Santa Cruz, California, in seine, April 12, 1897 (Alba- 
tross); Trinidad, Humboldt Co., California (Holmes); Chirikof Island, 
Alaska, anchorage, 9-14 fathoms, sand (W. H. Dall). 
CRANGON DALLI Rathbun. 
Crangon dalli RATHBUN, Proc. U.S. Nat. Mus., xxIv, 889, 1902. 
Rostrum rather long and narrow, sides parallel for a portion of their 
length, edges upturned. Second antennular segment about one and a 
half times as long as the third; inner flagellum exceed- 
ing the acicle; outer flagellum considerably shorter. 
Acicle about seven tenths as long as the carapace; blade 
obliquely subtruncate, inner angle rounded, receding ; spine 
extending beyond the blade to no greater extent than the 
anterior width of the blade. The first pair of feet reach 
only to the middle of the terminal joint of the maxillipeds ; 
the hands widen considerably from the proximal to the 
distal end; the distal margin is transversely oblique; the 
width of the palm is contained in its greatest length about 
Fic. 60. Crangon 2 ~ 
dalli. @. Station two and two thirds times, 
3287. a. Dorsal view 
of rostral region(x The first to fifth segments of the abdomen are smooth; 
3)._ 8. Acicle (x 2 
¢. 
Chela (x4). the sixth has two blunt but prominent longitudinal carine, 

