138' University of California Publications in Zoology [Vol. 23 



Color. — In formalin body and legs pinkish red. Segments of second and third 

 pairs of feet white at distal ends; dactyli striped longitudinally with pinkish and 

 white (Eathbun). In life antennae are greenish, with alternating large and small 

 golden yellow spots every two or three segments of the flagellum; every segment 

 of first ten spotted; distal segment of antennal peduncle not spotted, plain color. 

 Distal half of propodi of ambulatory legs white, occasionally with slight reddish 

 or pinkish cast, never marked, so far as I have been able to ascertain, with blue; 

 the rest of joint marked with stripes of bluish or greenish brown, corresponding 

 with stripes as the dactyls; dactyls similar to those of P. samuelis, either without 

 orange or with a mere trace of it; stripes distinct and more pronounced through- 

 out their length. Large hand often whitish or greenish white. 



Type Locality. — Puget Sound. 



Distribution. — St. Paul Island, Pribilofs (T. Kincaid), Aleutian Islands to San 

 Diego, California; Siberia, Kamchatka (Rathbun). Japan (Stimpson) (Balss). 

 Low tide to 17 fathoms. 



Bernards. — The specimen figured above is very true to type P. hirsutiusculus 

 from the Aleutian Islands. I have seen no specimens from California which are 

 quite so large as the one figured or with such great length of aeicle (antennal 

 scale) and breadth of carapace. The carapace as figured appears more squat 

 than is often the case. The eye-stalks in the California specimens are proportion- 

 ately thicker. 



The breadth of carapace, thickness of eye-stalks, length of antennal scales and 

 dactyls, general appearance of the larger hand, and color in life, will always 

 serve to distinguish this species from P. sarrmelis. 



Biological Survey of San Francisco Bay. — Pagurus hirsutiusculus 

 is the common hermit crab of the bay and is found in littoral and 

 more shoal waters, principally of the middle bay where it is well dis- 

 tributed (see plate 8). 



There is only one record from the upper bay, a single specimen 

 dredged in 4 to 24 feet (D 5757), on a fine grayish-black, very muddy 

 sand bottom. Six specimens were obtained at four (10%) of the 

 lower bay stations (D 5723, 5766, 5768, 5781), which, except for 

 D 5766, where three specimens were obtained from a soft mud bottom 

 in 3 to 4 fathoms in Alameda Creek, were dredged on more or less 

 shelly bottoms, at rather widely distributed stations : D 5723, 9% to 

 11 fathoms, "black, sticky mud streaked with brown, many shells, 

 clinkers" and abundant ophiurans, off Mission Rock; D 5768, 1 to 3 

 fathoms, hard shelly bottom, off Alameda ; D 5781, 3 to 12 feet in the. 

 oyster beds, between Point San Bruno and Point San Mateo. 



In the middle bay Pagurus hirsutiusculus is recorded from thirteen 

 (18%) of the dredging stations, of which all but three were made at 

 depths varying from 5 feet to 5 fathoms (D 5705, 5708, 5744, 5753, 

 5755, 5756, 5763, 5764, 5765, 5773, 5778, 5779, 5826). The three 

 deeper stations (D 5705, 5708, 5826) ranged from 7 to 12 fathoms 

 in depth, and at the deepest of these (D 5708), in 10 to 12 fathoms, 



