THE SHORE FISHES OF PERU 393 



from Independencia Bay (U. S. N. M. No. 128196), which is 39 mm. 

 long, has been selected as the type. The following proportions and 

 enumerations apply to the type: Head 3.5 in length; depth 4.1; anal 

 base 2.15; pectroal 4.4. Eye 3.6 in head; snout 3.4; interorbital 18; 

 maxillary 3.0; caudal peduncle 3.1; longest dorsal spine 2.5; ventral 

 1.4; pectoral 1.25. D. XII, 16; A. 21; P. 14. 



The species as represented by the specimens just described, seems 

 to differ from H. payiensis, known to me only from the original 

 description, in lacking a cross groove behind the eyes and in having a 

 larger head, larger eye, a much shorter orbital tentacle, and lower 

 dorsal spines, as shown in the descriptions. It differs from H. lignus 

 Meek and Hildebrand, from Panama Bay, in the absence of a cross 

 groove behind the eyes in having a broader gill opening (not reaching 

 below lowermost ray of pectoral in lignus), and in having more anal 

 rays (17 to 19 in lignus). 



The species was named robustus because of the plump, robust body. 



Range. — Known from Talara, Callao, Chimbote, and Independencia 

 Bay, Peru. 



HYPSOBLENNIUS species (juveniles) 



Head 3.7 to 4.3; depth 4.25 to 4.6; D. XII, 14 or 15 (one specimen 

 with 16) ; A. 18 to 20; P. 14 (one specimen with 13). 



Body anteriorly robust, compressed; head short, broad, anteriorly 

 nearly vertical; no cross groove behind eyes; caudal peduncle strongly 

 compressed, 4.0 to 4.6 in head; snout very blunt, 4.5 to 5.1; eye 2.7 

 to 3.2; interorbital 4.0 to 4.6; mouth horizontal, terminal; maxillary 

 reaching anterior margin of pupil, 3.6 to 4.2 in head; teeth in a single 

 close-set series in each jaw; no canines evident; preopercle with 3 well- 

 developed spines, the middle one largest; anterior nostril with a small 

 flap behind it; tentacle on upper margin of eye very small, less than 

 half length of pupil in the larger specimens, visible, though only a 

 mere point, in specimens 15 mm. long, not evident in the smallest 

 ones; gill opening fairly large, extending below lowermost ray of 

 pectoral; lateral line not evident in all the specimens, very short if 

 present; dorsal beginning over, or somewhat behind, margin of pre- 

 opercle, moderately notched; base of soft part of about same length as 

 that of spinous part, the longest rays somewhat higher than the longest 

 spines; caudal slightly concave in the smallest specimens, straight 

 to convex in the larger ones, rather far removed from the dorsal and 

 anal; anal long and low, its base 2.3 to 2.6 in length; ventral moderately 

 long, the longest rays distally free, 1.2 to 1.4 in head; pectoral large, 

 about as long as head, 3.7 to 4.25 in length. 



Color not fully developed; body unpigmented, except in the two 

 largest ones, these with six more or less definite dark "saddles" on 

 back composed of somewhat disconnected spots, these specimens also 



