98 CALIFORNIA ACADEMY OF SCIENCES. 



67.2. Bagrus punctidatus Castelnau, 1. c. 33, pi. xiv, 

 fig. 2. 



Deeper than wide. Head with striations. Adipose 

 8J in the total length; pectoral spine much longer than 

 the dorsal spine and serrated. Eye nearer snout than 

 to opercle. Maxillary barbels longer than the head. 

 Anterior portion of the back with yellow spots. Caudal 

 emarginate. Depth 4 in the total; width 6J ; D. I, 6; 

 A. 11. 



ANALYSIS OF THE AMERICAN GENERA OF PIMELODIN.E. 



a. Teeth on vomer none; adipose fin long or moderate; top of head cov- 

 ered with skin, not granulated. 



b. Snout pointed, produced considerably beyond the lower jaw; denti- 

 tion of both jaws weak, consisting of narrow bauds of loosely-set 

 teeth. Adipose fin long; first ray of the dorsal and pectoral fins 

 articulated, not pungent, as long as, or longer than the following rays; 

 dorsal and anal fins emarginate. PIMELODINA xi. 



bb. Snout rather broad, scarcely produced beyond the lower jaw; teeth 

 well developed. 



c. Barbels broad and long, and having a broad membranaceous border 

 on the posterior margins; first ray of the dorsal and pectoral fins 

 articulated, not pungent, as long as, or longer than any of the fol- 

 lowing rays; dorsal and anal fins emarginate. Head entirely cov- 

 ered with skin. PINIRAMPUS xn. 

 cc. Barbels terete or flattened, little, if at all, margined. 



d. Snout broad and produced, spatulate. First ray of the dorsal 

 and pectoral fins articulated, not pungent; Occipital process a 

 narrow ridge. Head entirely covered with skin; upper portion 

 of the cheek, nasal and occipital surfaces reticulated. Dorsal and 

 anal fins emarginate. LUCIOPIMELODUS xm. 



dd. Snout not produced. 



e. Top of head entirely covered with skin. 



/. Head as broad as long, or very little narrower; orbit without 

 a free margin; occipital process reaching, or almost reaching 

 the dorsal plate; adipose fin short. PSEUDOPIMELODUS xiv. 

 ff. Head longer than broad. 



g. Occipital process if present, not reaching the dorsal plate. 

 h. Fontanel not continued behind the eye. EHAMDIA xv. 

 hh. Fontanel continued to base of occipital process. 



i. Orbit with a free margin; dorsal placed at least par- 

 tially in front of the veiitrals; dorsal and pectoral with 

 a pungent spine. KHAMDELLA xvi. 



