234 PROCEEDINGS OF THE ACADEMY OP [1880, 



No gill-rakers ; pharyngeal hones large. 



Supra-ocular and post-ocular ridges prominent, the former 

 curved inwards posteriorly, parallel to the post-ocular ; between 

 the two, at the posterior upper angle of the eye, are two small 

 spines or short ridges. 



Occipital ridges with three tubercles, the anterior near the post- 

 oeular ridge, the two postei'ior near together and elongated 

 transversely ; a low ridge between the first and second. 



Temporal ridge with three tubercles, the first immediately 

 exterior to the first of the occipital series, the second a longi- 

 tudinal ridge ; the third rounded, close to the second. 



A long low crest across the operculum ; just above and anterior 

 to this a shorter ridge connecting it with the temporal series ; a 

 tubercle on the supra-scapula ; no spines upon the head, except 

 two upon the posterior border of the pre-operculum. 



All the tubercles of the head and the spines of the pre-operculum, 

 covered b}' skin. 



Maxillary with a fimbriated skinu}- flap near its posterior 

 extremit}' ; lower margin of mandible set along its whole length 

 with skinny flaps, of which three pairs are especially long and 

 fimbriated on both edges, while the posterior flap is very broad. 



Lips well developed ; lower lip pendulous at sides, and to a 

 rather less extent in front, and bearing a fimbriated flap on each 

 side. 



Two pairs of similar flaps on the snout, and two over each eye. 



Gill-membranes continuous below the throat. 



Branchiostegals, 6. 



Origin of first dorsal slightly anterior to the lower pectoral 

 axil ; first two spines longest, about 2f in the length of the head, 

 fourth much shorter than the third, and a little shorter than the 

 fifth ; sixth, seventh and eighth much longer than fourth, the 

 remaining spines diminishing to the eighteenth, which is the 

 shortest. 



A tag at the end of each spine, the membrane between the two 

 parts of the first dorsal notched considerably. 



A spine at the commencement of the second dorsal, the base of 

 which is contained more than 2^ times in that of the first, the 

 rays increasing in length to the fifth, which is about ^ longer than 

 the longest spine of the first dorsal ; upper margin of second 

 dorsal, convex. 



