THE SPIDER CRABS OF AMERICA 



173 



The basal article of the antennae bears a tooth at the antero- 

 external angle; flagelluni not reaching end of rostrum. A row of 

 tubercles on pterygostomian region. Chelipeds large and strong. 

 Merus triangulate, margins cristate; superior crest with three or more 

 teeth; outer surface crossed by a blunt ridge. Carpus with two 

 longitudinal crests; upper surface with an oblique 

 ridge, outer surface uneven. Propodus very 

 broad, compressed, and with a superior crest; 

 inferior margin with a prominent posterior lobe. 

 Fingers in adult males ^^'idely gaping; cutting 

 edges dentate; a large tooth near base of dacty- 

 lus. Ambulatory legs stout, obscurely tuber- 

 culate. 



Color. — Dorsal surface usually greenish 

 brown, ventral side much lighter; but specimens 

 foimd among red algae are a brilliant red 

 (Way). 



Measurements. — Male (5771), length of cara- fig. 64.-pugettia gracilis 

 pace to end of horn 53, width 39.2 mm. (isi^o), maxilliped, x 4.44 



Range.—From. the western extremity of the Aleutian Islands east- 

 ward and southward to Mendocino, California. "To San Francisco" 

 (Bate). " San Luis Obispo " (Lockington) . Shore to about 40 fath- 

 oms. The more southern of the reported occurrences of the species 

 in California need confirmation; intensive collecting in San Francisco 

 and Monterey Bays has failed to reveal it. 



Moierial examined. — 



ALASKA 



Chichagof Harbor, xVttu Island, Aleu- 

 tians; 5 to 7 fathoms; G. S.; 1873; W. 

 H. Dall; 1 male, 1 female (14756). 



Attn Island; shore; June 10-11, 1906; 

 Albatross; 9 males, 2 females (46632) . 



Agattu Island; shore, among rocks; 

 June 8, 1906; Albatross; 6 males, 5 fe- 

 males (1 ovigerous). 



Kiska Harbor, Kiska Island; 1873; 

 W. H. Dall; 9 to 12 fathoms; sdy. M.; 

 1 male (14797) , covered with sponge. In 

 Fig. 65.— pugettia gracilis, anterior Pass; 10 fathoms; 1 male (14759). 



PORTION, VENTRAL VIEW, XI. 8. niln 1 T")- O O 



(AFTER DANA AND schmitt) Pctrcl Bauk, Bermg Sea; Semiso- 



pochnoi Island, r. t. S. 45° W., 1. t. S. 

 12° W., about 12 miles; lat. 52° 12' N., long. 179° 52' E.; 43-33 

 fathoms; fne. bk. G.; June 5, 1906; station 4778, Albatross; 2 females 

 (1 young, I soft shell) (46532). 

 5487— 25 1 13 



