92 bulletin: museum of comparative zoology. 



somewhat nearer tip of snout than to angle of mouth. Gill-opening 

 about one third larger than eye and located on middle of sides. 



No pectoral fins, but dorsal and anal are distinct, and unite around 

 tail; origin of the dorsal on the nape of head far in advance of gill- 

 openings. 



Color in alcohol: — yellowish brown the anterior two thirds of body 

 with narrow lines of dark brown which mark oiT the ground color in 

 round or hexagonal yellowish white spots; these are small on the head, 

 but from the gill-openings posteriorly they are chiefly larger than eye 

 and of much greater width than the dark brown wavy bands on the 

 posterior third of the body; these wavy bands are almost equal to the 

 interspaces and extend far into the dorsal, but not into the anal; 

 there is a dark stripe along the base of anal and extending more or 

 less interruptedly across the belly to chin; otherwise the anal is white; 

 the gill-openings are black. 



Total length 645 m.; length to anal pore 275 m.; length of tail 

 370 m.; length of head 67 m. 



This specimen somewhat resembles G. insignis, but has a larger 

 mouth, longer snout, and is differently marked. 



Tijpe.— M. C. Z. 5954. Mauritius. Nicholas Pike. 



Gymnothorax dorsalis, sp. nov. 



Body elongate, compressed, cylindrical, the snout not particularly 

 sharp pointed, the tail even compressed on the lateral plane in the 

 posterior third of length, but not so strongly compressed on the ver- 

 tical plane; depth at anal pore 3.50 in head; length of tail only one 

 half length of head greater than head and trunk. 



Head 8.2 in total length; 2.8 in trunk without head; width of head 

 but little more than its depth; mouth rather latge, closing com- 

 pletely; length from tip of snout to angle of mouth 3 in head, the 

 upper jaw just a trifle the longer. 



Teeth of maxillary biserial, sharp, compressed, conical, about 

 twenty in outer series and four large depressible canines in the inner 

 maxillary series; premaxillary uniserial, of seven strong teeth; inner 

 with three large depressible canines anteriorly, plus a single series of 

 three strong sharp teeth on the shift; mandibular teeth in a single 

 row of twenty-four on the sides, plus an inner row anteriorly of four 

 canines. 



