182 



CALIFORNIA ACADEMY OF SCIENCES 



Measurements irt Hundredths of Length without Caudal. 



Length to base of caudal in mm 



Length of head 



Greatest width of head 



Length of snout 



Diameter of eyeball 



Interocular width 



Length of maxillary 



Greatest depth of body 



Depth of caudal peduncle 



Snout to first dorsal spine 



Base of second dorsal (to base of last ray) 



Snout to front of anal 



Base of anal (to base of last ray) 



Length of caudal 



Length of pectoral (from middle of axil) ... 

 Length of ventral 



328. Batrachoides boulengeri sp. uov. 



Plate XXXI, Figs. 57-57a. 



Batrachoides suriiiamensis Gunther, 1861 b, p. 174 (in part); Gunther, 1868, p. 388. Not 

 Batrachus surinamcnsis Bloch & Schneider (Surinam). 



Head 2| to 2| in length; greatest width of head 3-|; depth 5*. Interorbital width 2|^ to 2\ 

 in head; snout 4^; maxillary i| to i| in head. Eye 3| to 4 in interorbital width, 10 to n in head. 

 Dorsal III, 27 to 29; anal 25 or 26. 



Head very strongly depressed, the posterior part of trunk strongly compressed, the depth and 

 width about equal at a point opposite the tip of the pectoral fins. The arrangement of pores and 

 barbels on the head is essentially as in B. pacijici, but the filaments are more numerous and larger. 

 As in other species, the filaments are clustered, being for the most part the fringed margins of cutane- 

 ous flaps which occur in pairs on either side the organs of the lateral lines. 



The teeth near mandibular symphysis are in a broad cardiform patch, with the outer series 

 enlarged to form broad conical canines. The sides of the mandible are occupied by a single series 

 of very strong conical canines, two or three of which near the middle of each ramus are much larger 

 than those in front and behind; this series is continuous with the posterior series of the cardiform band, 

 where they decrease rapidly in size, those nearest the symphysis being scarcely larger than the others 

 of the band. Vomerine teeth normally eight in number, the median ones small, the others increasing 

 rapidly, the outermost usually as large as the largest of the palatine series. Palatine teeth strictly in a 

 single series, eleven in number on each side; they increase regularly from the anterior end backward 

 to the sixth, which is the largest, the remaining five being subequal, and about as large as the third. 



