436 CALIFORNIA ACADEMY OF SCIENCES. 



Pseudancislrus wertheimeri Eigeiim. &Eigenm. Proc. Cal. Acad.2d 



Ser. ii, 45, 1889 (Santa Clara, Kio Mucuri). 

 Habitat : Kio Mu curi . 



Depth below the dorsal spine 1J in the width. Head 

 depressed, flattish above. Surface of the frontals, post- 

 frontals and occipital finely granular; of the temporal 

 plates with finely reticulating dentiferous ridges. 



Snout broad, rounded, its tip naked. A series of three 

 large plates between the eye and tip of snout, the cen- 

 tral one largest; loreal region concave. A large patch 

 of bristles on the sides of the head, opercle and sub- 

 opercle; the bristles largest and most numerous in the $ . 



Eye 3J-4 in the snout, 6f 7J in the head, 2J-3 in the 

 interorbital. 



None of the plates of the body carinate. A large 

 granular plate in front of the gill-openings, lower sur- 

 face of the head otherwise naked. The plates on the 

 sides of the belly are short and wide, in a single series. 



Dorsal fin little, if any, higher than long, its base 

 longer than its distance from the adipose fin; not more 

 than one azygous plate before the adipose spine. 



Caudal emarginate, the upper ray produced. 



Pectoral reaching to the ventral fins. 



Ventrals attaining the anal fin. 



A rather large pectoral pore. 



Dark brown; a median dark stripe or series of spots 

 on the membrane between the dorsal rays; some spots 

 also on the rays of the dorsal fin; basal half of caudal 

 fin spotted; ventral and pectoral with a median stripe 

 between the rays; two or three series of indistinct light 

 spots on the upper part of the body. 



Head 3|-3J ; D. I, 7; A. 6; V. I, 5; P. I, 6; Lat. 1. 23-24. 



Seven specimens .24-. 29 m. Santa Clara, Rio Mucuri. 



