G50 MB. E. J. MIEllS ON THE 



spiue present. Basal antenual joint not much enlarged at base. 

 Type Mimiilus foliatus, Stimpsou. 



Epialttjs, M.-Eclwards. Eostrum lamellate, emarginate. 

 Prajocular spine present. Basal autemial joint considerably en- 

 larged at base. Ambulatory legs with the penultimate joint not 

 dilated and compressed. 



Subgenus 1. Epialtus. Carapace suboblong. Second tooth 

 of the antero-lateral margins greatly developed. Type Epialtus 

 hittiherculatics, M.-Edwards. 



Subgenus 2. Antilibinia, M'Zeai/. Carapace suboval, smooth, 

 or uneven. Second tooth of the antero-lateral margins small. 

 Type Antilihinia S^nithii, M'Leay. 



I place in this subgenus the "W.-American species with smooth 

 oval carapace. M'Leay's type species is from S. Africa. In the 

 American species {E. dentatus, E. emarginatus) the orbital mar- 

 gin, although not prominent, is so well defined and circular that 

 they might almost be separated as a distinct genus, and placed 

 near Scyra in the Periceridae. A. SmitMi externally resembles 

 the species of Lihinia. 



*EuPLEUEODON, Btim^son. Carapace depressed and uneven ; 

 antero-lateral angles strongly prominent. Ambulatory legs 

 strongly prehensile, penultimate joints dentigerous. Type Eic- 

 pleurodon trifurcatus, Stimpson. 



This genus seems to be in some degree intermediate between 

 the su.bgenera JEpialtus and Antilihinia. 



*# ^lagellcB of antenncB exjposed and visihle from alove at side of 

 rostrimi (basal joint ofantenncB not much enlarged at lase). 



PuGETTiA, Dana (JPeUinia, Dana). Carapace somewhat con- 

 stricted behind the second lateral spine. Ambulatory legs slender, 

 with the penultimate joint not dilated or compressed. Type 

 Pugettia gracilis, Dana, 



AcANTHONTX, Latreille. (Plate XII. fig. 6.) Carapace usually 

 suboblong, not constricted behind the second lateral spine. Am- 

 bulatory legs with the penultimate joint more or less flattened, 

 dilated, and compressed. Type Acanthonycc lunulatiis, Eisso. 



(The genus DeJiaanius of M'Leay, Anuulosain Smith's S. Africa, 



