PART 1 GARTH : PACIFIC OXYRHYNCHA 77 



Gollodes tumidus Rathbun 

 Plate E, Fig. 4; Plate 3, Fig. 6 



Collodes tumidus Rathbun, 1898, p. 569, pi. 41, fig. 1 ; 1923b, p. 633; 

 1925, p. 121, pi. 40, figs. 1, 2; pi. 218, fig. 5; text-fig. 47. Crane, 

 1937, p. 56. 



Type: Male holotype, U.S.N. M. No. 21571, length 11.6 mm, width 

 9.5 mm. 



Type locality: Magdalena Bay, Lower California, Mexico, 12 

 fathoms, Albatross station 2831. 



Localities subsequently reported, with collectors: Mexico: Lower 

 California: middle of east side of Cedros Island, Albatross (Rathbun, 

 1923b) ; Gulf of California: east of La Paz, 10 fathoms, Albatross 

 (Rathbun, 1898) ; Arena Bank, 35 fathoms, Zaca (Crane). 



Atlantic analogue: Collodes inermis A. Milne Edwards. 



Diagnosis: Rostrum minute, bifid. Carapace smooth and bare ex- 

 cept for scattered granules posteriorly and laterally and hooked hairs 

 on gastric and branchial areas. Four setose tubercles forming a diamond, 

 one gastric, one cardiac, and two inner branchial. Postorbital tooth large, 

 anterior margin convex and spinulous. Basal antennal article with outer 

 lobe and marginal teeth spinulous. Tip of male first pleopod thickened, 

 lateral lobe exserted. 



Description: Carapace granulate along the posterior and lateral 

 margins, the granules large on the hepatic regions and reaching forward 

 a little on the branchial and cardiac regions ; a few granules also between 

 the orbits. Four tubercles near the middle of the carapace at the most 

 elevated portions, one gastric, one cardiac, the other two at the inner 

 angles of the branchial regions. Otherwise the central part of the 

 carapace smooth. Front bidentate, the teeth triangular, blunt, and 

 separated by a space subequal to either tooth. Postorbital tooth slightly 

 curved, convex forward, shorter than the eye. Basal antennal article 

 broad, inner or lower edge entire, outer edge unevenly dentate, upper 

 and lower terminal lobes equally advanced. Male sternum and eleva- 

 tions of first three abdominal segments finely granulate; otherwise the 

 abdomen in both sexes nearly smooth. 



Chelipeds of adult male slightly enlarged. Palm narrowing per- 

 ceptibly near the distal end. Fingers gaping to near the tips, dactylus 

 with an enlarged tooth near the base, fixed finger with a similar tooth 

 marking the proximal third. Ambulatory legs rather stout. (Rathbun, 

 1925) 



