428 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 21 



635; 1924c, p. 379; 1925, p. 349, pi. 125, figs. 3, 4. Crane, 1937, 

 p. 59. Steinbeck and Ricketts, 1941, p. 466, pi. 24, fig. 2. 

 Platypes edentata Lockington, 1877b, p. 41 ; type locality, Mazatlan, 

 Mexico; type, originally in C.A.S., no longer extant; 1877c, p. 65. 

 Thoe sulcata sulcata, Crane, 1947, p. 71, text-fig. 2B. 



Type: 9 males, 3 females, cotypes, M.C.Z. No. 1222. Length of 

 measured cotype 22.8 mm. 



Type locality: Cape St. [San] Lucas, Lower California, Mexico; 

 John Xantus, collector. 



Localities subsequently reported, with collectors: Mexico: Gulf of 

 California: Tepoca Bay, Sonora, Fred Baker (Rathbun, 1924c); San 

 Francisquito Bay, Albatross (Rathbun, 1923b) ; Pt. Lobos of Espiritu 

 Santo Island, El Mogote, La Paz, and Pulmo Reef (Steinbeck and 

 Ricketts); Arena Bank, 2.5 fathoms, Zaca (Crane, 1937). Revilla 

 Gigedo Islands: Clarion Island, Zaca (Crane, 1947). Mainland south 

 of Cape Corrientes: Mazatlan, Hy. Edwards (Lockington, as Platypes 

 edentata) ; A. Agassiz (Rathbun, 1925) ; Chamela Bay, Tenacatita Bay, 

 and Sihuatenejo, Zaca (Crane, 1947) ; Puerto Angel, C. R. Orcutt 

 (Rathbun, 1925). 



Atlantic analogue: Thoe puella Stimpson. [This more strictly of 

 the following T. s. panamensis than of the parent species.] 



Diagnosis: Merus of chelipeds with two longitudinal rows of deep 

 excavations ; meri of walking legs with a superior row of spines. Two 

 anterior marginal lobes on basal antennal article. Dactylar tooth in gape 

 of manus slender, cylindrical. Male first pleopod without subterminal 

 spur. 



Description : Of larger size than Thoe puella ; anterolateral margins 

 more convex; areolations and berry-like tubercles less strongly marked. 

 Rostral horns contiguous, tips beadlike. The basal article of the external 

 antennae exposed from above, and bearing two anterior teeth or lobes; 

 separated from the fronto-orbital region by a deep suture or pit, and 

 with a deep pit on the upper surface of the spine or tooth at its exterior 

 angle ; below, a shallow groove running parallel with the outer margin. 

 The first two movable articles of the antennae broad and pitted ; the 

 remainder very slender. 



Merus of the chelipeds with two longitudinal but not contiguous 

 rows of deep excavations ; hands carinate beneath ; in the adult male the 

 fingers very slender, the excavate tips shorter than in Thoe puella, and 

 the large tooth of the dactylus near its middle and slender, as long as 

 wide. Both fingers more or less denticulate within. Merus of legs deeply 



