NO. 2 garth: new brachyuran crabs 17 



identified by W. Faxon as labyrinthicus were also examined, as well as 

 a female specimen (M.C.Z. 2219) taken in the Galapagos in June, 

 1872, by the Hassler, of which Rathbun (1930) notes: "slight varia- 

 tion." 



The 20 specimens of Glyptoxanthus taken at 10 stations of Velero 

 III in the Galapagos from 1933 to 1938 inclusive conform to the 

 Hassler specimen as regularly as do the Panamanian specimens to the 

 type of labyrinthicus, and may be distinguished from the mainland 

 species by a number of distinct features, which are clearly set forth in 

 the diagnosis above. The removal from synonomy of Lockington's G. 

 meandricus (1877) by the finding by Glassell of a valid species in the 

 Gulf of California to which the name is applicable shows that the genus 

 may well be represented in Pacific waters, as in the Atlantic, by several 

 species, one of which, according to the evidence now at hand, is indige- 

 nous to the Galapagos Archipelago and is herewith described. For com- 

 parative studies of carapace designs, fronts, claws, and male abdomens 

 of typical specimens of G. hancocki from James Island, Galapagos, G. 

 labyrinthicus from Port Utria, Colombia, and G. rneandricus from 

 Puerto Refugio, Angel de la Guardia Island, Gulf of California, 

 Mexico, see plates 4 and 5. 



I take pleasure in naming this species for Captain Allan Hancock, 

 who has given me the unparalleled opportunity of studying the Gala- 

 pagos crustacean fauna at first hand on five separate occasions. 



Genus HEXAPANOPEUS Rathbun 



Hexapanopeus cartagoensis, new species 



Plate 6, Figs. 1-4 



Type: Male, holotype. Cat. No. 384, Allan Hancock Foundation, 

 The University of Southern California, from Cartago Bay, Albemarle 

 Island, Galapagos, 15-18 fathoms; January 22, 1938; collected by Allan 

 Hancock Expedition of 1938 at Station 799-38. Ovigerous female, allo- 

 type. Cat. No. 384a, Allan Hancock Foundation, and two females, of 

 which one is ovigerous, paratypes, same locality, 3-6 fathoms; February 

 14, 1933; dredged by Allan Hancock Expedition of 1933 at Station 

 74-33. Three males and seven females, of which four are ovigerous, 

 paratypes, same locality, 8-10 fathoms; January 25, 1934; collected by 

 Allan Hancock Expedition of 1934 at Station 187-34. >^CiiPj \ 





