OLIGOSOMA, 245 



Plate XXVII, fig. 25, represents Eombronia fasciolaris, size of life. 



Fig. 26, an upper view of the head ; 



Fig. 27, the profile ; and, 



Fig. 28, an under view of the same region. 



Fig. 29, the left hand, from above; 



Fig. 30, the same hand, from beneath. 



Fig. 31, a group of dorsal scales; 



Fig. 32, a group of abdominal scales. 



Figs. 26-32, are somewhat magnified. 



GENUS OLIGOSOMA, GIRARD. 



CHAR. GEX. Corpore subcylindrico, breviori, squamis modicis et striatis 

 cooperto ; duabus seriebus dorsualibus medianis majoribus. Capite 

 subquadrangulo^pyramidaH, depresso; naribus in lateribus sit is. 

 Scutis supranasalibus nullis ; imrietalibm separatis. Dentibus pala- 

 tinis nullis. Palpebra inferiori disco pellucido praedita. Apertura 

 auditor ia antice subdenticulata vel simplici ; tympa.no plus minusve 

 prof undo. Membris modicis ; diyitis utriusque membri quinque inae- 

 qualibus ; pahni-s plantwque subtiliter granulosis ; scutellis subdigi- 

 talibus transi-ersis, laevibus. Cauda longa, subcylindrica, et minu- 

 ente. 



GEX. CHAR. Body subcjlindrical, rather short, covered with mode- 

 rate and striated scales ; two middle dorsal rows largest. Head 

 subquadrangulo-pyramidal, depressed. Nostril lateral, in one plate ; 

 no supranasals. Parietals separated. Palate toothless. Lower eye- 

 lid with a transparent disk. Auricular aperture subdenticulated in 

 front, or simple ; tympanum more or less sunk. Limbs moderately 

 developed ; five fingers and five toes, unequal ; palms and soles 

 finely granulated ; subdigital plates transverse, smooth. Tail long, 

 subcyliudrical, and tapering. 



SYX. Oltgosoma, GRD. in Proc. Acad. Nat. Sci. Philad. November, 1857. 



OBSERV. This genus is intimately related to Mocoa, from which it 

 differs chiefly by its less-developed limbs, and the separation of the 

 parietal plates. The middle occipital is also distinct from either the 



parietals or the latero-occipitals. 



62 



