304 



BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



tip, S much smaller than T. Front thick, double-edged by a shallow 

 groove; median emargination shallow, margin of lobes little oblique 

 and cut by shallow sinuses. 



Chelipeds very unequal in male; upper and outer surface of wrist 

 deeply dimpled or wrinkled; a strong tooth at inner angle of wrist. 

 Hand with blunt longitudinal carinae, two on upper margin and 

 three on outer surface; upper' carina of outer surface broad, having a 

 row of deep pits or dimples; lowest carina at inferior third of outer 

 surface and continued along upper margin of thumb; upper part of 

 inner surface of palm pitted. Entire surface of chelipeds and carapace 

 finely and closely granidate and irregularly punctate. Fingers cari- 

 nated, lower carina of outer surface of immovable finger is continued 

 one-third length of palm; fingers black, color extended on palm 

 ending in a zigzag line. Fingers of large hand gape widely, of small 

 hand slightly; major dactylus with two large prehensile teeth and 

 a small intermediate one; two large teeth on immovable finger; tips 



Figure 47.— Leptodius snodc.rassi, male, type, Albemarle Island, XI. S. 

 a. Chela, b. Dorsal view of crab 



broadly hollowed out ; fingers of minor chela with prehensile margins 

 wavy. 



Measurements. — Male holotype, length of carapace 13.1, width 20.4, 

 fronto-orbital width 11.8, width of front 5.5 mm. 



Range. — Found only at the Galapagos Islands. 



Material examined. — Albemarle Island, Galapagos Islands; 1899; 

 Hopkins Stanford Expedition: Black Bight; January 9; 2 males (I 

 holotype) (24831). Reef north of Tagus Cove; March 16; one minor 

 chel ped (Stanford Univ. Mus.). 



LEPTODIUS T.4BOGANUS Rathbun 



Plate 140 



Leptodius taboganus R.\thbun, Smithson. Misc. Coll., vol. 59, 1912, p. 3 (type- 

 locality, Taboga Island; type, Cat. No. 43658, U. S. National Museum). 



Diagnosis. — Last antero-lateral tooth pointing directly outward; 

 remaining teeth shallow, little projecting. Transverse branchial 

 ridge continued to margin of carapace. Color of immovable finger 

 extending on palm. 



