NO. 2 GARTH : NEW BRACHYURAN CRABS 15 



Remarks: This species may be distinguished from Eupleurodon 

 trifurcatus Stimpson (1871) by the absence of a small tooth between 

 the two lateral lobes, and from E. peruvianus Rathbun (1924) by the 

 greater proportionate anterolateral width as compared with the postero- 

 lateral, the less prominently notched front, and the absence of additional 

 tubercles on the gastric and branchial regions. It bears a superficial re- 

 semblance to Epialtus peruvianus Rathbun (1923) which is not borne 

 out by careful measurement, for the distance from tip to tip of the 

 hepatic lobes is considerably greater than the distance from the tip of 

 the hepatic to the middle of the posterior margin of the carapace, instead 

 of equidistant, if we judge from Rathbun's figure 53i (1925). Because 

 of the depressed carapace, the forward-directed hepatic teeth, and the 

 dentigerous penultimate articles, the species under consideration falls 

 logically into the genus Eupleurodon Stimpson rather than Epialtus 

 Milne Edwards. 



This interesting little crab is named for Dr. Mary J. Rathbun, Asso- 

 ciate in Zoology, U. S. National Museum, whose counsel has been in- 

 valuable in the preparation of this paper. 



XANTHIDAE 



Genus GLYPTOXANTHUS A. Milne Edwards 



Glyptoxanthus hancocki, new species 



Plate 4, Fig. 1 ; Plate 5, Figs, la, 2a, 3a 



Type: Female, holotype. Cat. No. 383, Allan Hancock Founda- 

 tion, The University of Southern California, and male, allotype, from 

 Sulivan Bay, James Island, Galapagos, shore; January 21, 1938; six 

 females, paratypes, same locality and date; collected by Allan Hancock 

 Expedition of 1938 at Station 796-38. 



Measurements: Female holotype: length of carapace 18.3 mm., 

 width 25.9 mm. Largest specimen (female, asymmetrical) : length 25.8 

 mm., width 38.0 mm. Male allotype: length 18.6 mm., width 26.9 mm. 



Diagnosis: Elevations sparsely pitted, 3M (of Dana) having but 

 two punctae, both median. Gastric areole independent of inner proto- 

 gastric. Front separated from rest of carapace by a transverse furrow 

 joining orbits. 5L raised above general level of carapace. Teeth pro- 

 jecting but little beyond arc of anterolateral margin. 



