466 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



Odhner divides the genus Xanihias according to the characters of 

 front and chelae. He groups under Paraxanthias the species notatus 

 (Dana), pachydactylus (A. Milne Edwards), elegans (Stimpson), 

 taylori (Stimpson), all of which have areolated, subhexagonal cara- 

 paces, strong lateral teeth and stout minor chelae, together with 

 dispar (Stimpson), longimana (A. Milne Edwards) and alcocki 

 (Caiman), which have almost smooth, barrel-like carapaces, only- 

 slight traces of lateral marginal divisions and very narrow, slender 

 minor chelae; and also parvus (Borradaile), which is intermediate 

 between these two subgroups. 



I do not believe that any useful purpose is subserved by placing 

 the species of the two groups together, and because the type species 

 of the genus Liomera has been transferred to the genus Carpilodes, 

 I am obliged to make a new genus for the species dispar and longi- 

 mana. (See below.) Perhaps parvus should be placed there also. 

 The species alcocki should remain in the genus Lioxanthodes, the lateral 

 lobes of its front not being separated from the inner supra-orbital 

 angles. 



KEY TO THE AMERICAN SPEQES OF THE GENUS PAKAXANTHIAS 



A'. Manus nodulous. 



B'. Each half of frontal margin bituberculate. Legs densely hairy. 



taylori p. 466. 

 B2. Each half of frontal margin slightly arcuate except for a small tooth at 



outer angle. Legs sparsely hairy ___insculptus, p. 468. 



A^ Manus not nodulous. Roughness inconspicuous sulcatus. p. 469. 



PARAXANTHIAS TAYLORI (Stimpson) 



Plate 188; Plate 189, Figure 1 



Xanthodes taylori Stimpson, Ann. Lye. Nat. Hist. New York, vol. 7, 1861, p. 208 



[80], pi. 3, fig. 3 (tj'-pe-locality, Monterey, California; type not extant). 

 Xanihias taylori Holmes, Occas. Papers California Acad. Sci., vol. 7, 1900, p. 



65.— ScHMiTT, Univ. California Publ. Zool., vol. 23, 1921, p. 246, text-fig. 



147, pi. 37, fig. 8, and synonymy. 

 Paraxanthias taylori Odhner, Goteborg's K. Vet. Handl., Fjjirde Foljden, vol, 



29, No. 1, 1925, p. 85. 



Diagnosis. — Carapace subhexagonal, deeply areolated; antero- 

 lateral teeth strong. Carpus and manus with prominent smooth 

 tubercles. 



Description. — Carapace flat behind, in front strongly convex 

 longitudinally but nearly plane transversely. Areolets anteriorly 

 embossed. Lobes of front separated by a wide rounded median 

 notch and furnished with a rounded tooth at inner and outer angles, 

 between which are several tubercles; above the front a transverse 

 crenulated ridge; inner orbital angle prominent, separated by a deep 

 notch from outer angle of front ; upper orbital margin with a rounded 

 tooth which is bounded on either side by a deep sulcus; postorbital 

 tooth small and continuous posteriorly with a rounded protuberance; 



