394 CALIFORNIA ACADEMY OF SCIENCES. 



SUBFAMILY PLECOSTOMIN^. 



LXXX. MlCROLEPIDOGASTER. 



Microlepidogaster Eigenm. & Eigenm. Proc. Cal. Acad. 

 Sci. 2d Ser. ii, 42, 1889 (perforate). 



Type: Microlepidogaster perforatus E. & E. 



This genus resembles Otocinclus in its perforate tem- 

 poral plate, and differs from it in the ventral covering 

 and position of the dorsal fin. 



341, Microlepidogaster perforatus. 



Microlepidogaster perforatus Eigenm. & Eigenm. Proc. Cal. Acad. 

 2d Ser. ii, 42, 1889 (Kio Carandahy, Brazil). 



Type: No. 8182. One specimen .032 m. to base of caudal; Kio Car- 

 andahy, Brazil. 



Broad and depressed anteriorly, the depth less than 

 the width. Head broad, depressed, its depth little 

 more than 2 in its length to end of temporal plate; its 

 width 1J in its length. Snout narrow, pointed, loreal 

 region concave; eye small, 4 in snout, 8J in head; inter- 

 orbital concave, equal to the postorbital portion of the 

 head. 



Temporal plate perforate, a larger foramen posteriorly 

 directly behind the eye. A large foramen above and be- 

 hind the pectoral spine. 



All the plates hispid, most so on tail, but without keels. 

 Lower surface of the head naked. Teeth well developed 

 in both jaws. Coracoid and clavicula granular. Belly 

 to between the ventrals entirely covered with small gran- 

 ular plates; a rather long, narrow, naked pre-anal region. 



Origin of dorsal equidistant from tip of snout and base 

 of caudal; origin of ventrals equidistant from tip of snout 

 and tip of anal fin. 



D. I, 7 (?); A. 5 (?); Lat. 1. 27. 



