90 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



Merus of ambulatory legs moderately slender, hairy, compressed, 

 and minutely spinulous along anterior margin. Carpus hairy above, pro- 

 podus along inferior margin as well. Dactylus densely hairy with an 

 amber tip; dactylus of fourth leg outcurving. 



Male abdomen widest at segment three, which does not completely 

 cover the sternum, narrowest at base of segment six; tip of seventh 

 segment broadly rounded. (See pi. 25, fig. 3.) 



Color in life: Carapace cream color overcast with huffy brown. Fin- 

 gers pale lilac, dactyls of ambulatory legs white. Ventral side pale cream 

 buff with tinge of lilac. Legs pale cream buff and lightly touched with 

 reddish brown. (Petersen) 



Distribution: The 60 specimens collected at 15 Velero stations by 

 Allan Hancock Expeditions range from north of Angel de la Guardia 

 Island, Gulf of California, Mexico, to Port Utria, Colombia, from shore 

 to 70 fathoms. 



Remarks: Since the appearance of Bulletin 97 of the U. S. National 

 Museum (1917), Miss Rathbun has described two new species of Cyrto- 

 plax from the west coast of the Americas, calling each in turn the Pacific 

 counterpart of C. spinidentata (Benedict) (1892) without reference to 

 the other. The same designation accompanied her determination of the 

 new species described above by Mr. Ziesenhenne. After consulting types 

 the writer believes that C. schmitti Rathbun (1935), a large, glabrous 

 species, is the most nearly perfect analogue of the Atlantic species. C. 

 Valeriana Rathbun ( 1928) appears to be outside the scope of the genus as 

 conceived by him. Mr. Ziesenhenne's species is unlike any other Cyrtoplax 

 examined, having a superficial resemblance to Chasmophora macroph- 

 thalma (Rathbun) (1898) from the same Panamic region. However, 

 the possession of five anterolateral teeth instead of the four of Chasmo- 

 phora and the ratio of fronto-orbital to total width (5 to 7 instead of 

 6 to 7) definitely removes this possibility. 



An analysis of the American species of Cyrtoplax, exclusive of C. 

 Valeriana, will appear in a forthcoming paper. 



Genus GHASMOGARCINUS Rathbun 



Ghasmocarcinus longipes, new species 

 Plate 26, Figs. 1-5 



Type: Female, holotype. Cat. No. 389, Allan Hancock Founda- 

 tion, The University of Southern California, from Secas Islands, 



