DECAPODS 12! 
feet reaching the end of the maxillipeds; hand 
very long and narrow, the length from four to At 
four and a half times the width, longer in male 
than in female, inflated near the base, outer margin 
concave for the most part, inner convex, dactylus 
when flexed almost longitudinal. 
Abdominal segments smoothly rounded; fifth co 
° ° : . = San Franciscomarket. 6, Chela 
with a spine on either side of the posterior ex- of ¢. Station 2528. 
tremity at the supero-lateral angles. Sixth segment as in C. nigricauda, 
telson sharp. 
Dimensions.—Length of male 77 mm., length of carapace 20.5 mm., 
of antennal scale 15 mm. 
Distribution.—I have examined specimens from 
Thorn Arm, southeastern Alaska, in drag seine (4/batross). 
Promise Island, southeastern Alaska (A/datross). 
Loring, Revillagigedo Islands, southeastern Alaska (A/batross). 
Strait of Fuca (D. S. Jordan). 
Puget Sound (D. S. Jordan). 
Mouth Tenmile Creek, 10 miles south of Florence, Oregon (S. E. Meek, 
U. S. Fish Commission). 
Off Tillamook Rock, Oregon, 29 fathoms (A/éa/ross station 2883). 
Off Yaquina Head, Oregon, 28 fathoms (4/atross station 3055). 
San Francisco Bay (A/batross): on South Belmont Oyster Beds, with 
seine; off San Mateo, 3 fathoms, with boat dredge; in San Pablo 
Bay, in Chinese shrimp nets; San Pablo Bay, 12 fathoms, station 
3097; and off San Bruno Point, in Chinese shrimp nets. 
San Francisco Bay (various collectors). 
San Francisco market (R. E. C. Stearns). 
Pacific Grove, California (Stanford University). 
San Diego, California (H. Hemphill). 
Previously known also from Shoalwater Bay, Washington, and To- 
males Bay, California. 
This form is represented in deeper waters by a form which I have called 
b 
Fic. 61. Crangon francis- 
rum (X 23). a. Chela of &. 
CRANGON FRANCISCORUM ANGUSTIMANA Rathbun. 
Crangon franciscorum angustimana RATHBUN, Proc. U.S. Nat. Mus., XxIv, 
889, 1902. 
Its chief difference lies in the shape of the hands, 
which are narrower than in C. franciscorum, the differ- 
ence being less in the female; in the 
Fic. 62. Crangon fran- E 
Chace s ese ly male the length is about five and a Sa 
ela o x24). Station 2 és . 
362. : half times the width, the dactylus is 
ae : Fic. 63 C 
more longitudinally placed, and the pollex is more trans- francisconum anguste 
Z - Chel 5 
verse and nearer the proximal end of the hand. Cee nr 
