r.oiuoiDS. 121 



■which extend forwnnl upon the interorbital space. Operculiun -with a short 

 rather Aveuk down and backward-directed spine. Epicoracoid long, slender, 

 extending down behind the base of the pectoral. 



Vertical fins confluent. Dorsal origin above the b.ase of the pectoral, 

 slightly in advance of a vertical from the A'ent. No ventral disk : pelvis 

 rudimentary, the basal elements of considerable size, Plate XXVII I., fig. 

 2'.-2'. No trace of a disk appears externally, the pelvis is only to be dis- 

 covered by removal of the tissues close behind the humeral s^-mphysis. 

 Upper portion of the pectoral with about eighteen rays separated from the 

 lower portion of four, rarely five, rays by an interspace of membrane sup- 

 ported by a couple of short rays, Plate XXVIII., fig. 2'^. Longest rays of 

 the pectoral, in the upper portion, nearly as long as the head ; the majority 

 of the rays have filamentary prolongations; the four or five rays in the 

 lower or anterior jiortion are only about half as long as the olhei-s. Eggs 

 large, nearly as large as the eye. 



Black on the sides and lower surface of the head, on the abdomen and 

 the fins ; remainder of tlie surface blackish to clouded brownish. 



Total lenu:th five inches or more. 



Judo-ing from what is known of them at the present the Gobies do not 

 lend themselves to the development of bathybial species as readily as less 

 active forms in other groups. Only four species have been reported from 

 depths greater than a hundred and fifty fathoms. The greatest depth is 

 that assigned Callionymvs Agassizii G. and B., 1888, at three liundred and 

 forty fathoms, in the Gulf of Mexico. This species was identified by Goode 

 and Bean for Agassiz's Tliree Cruises of the United States Coast and 

 Geodetic Survey Steamer " Blake " and published under this name in Vol. 

 II., p. 29, fig. 207 ; for reasons they do not mention it has been refigured 

 and described by them under the name CdlUonymus Iiimaniophonts G. B., 

 1896, Oc. Teh., 296, PI. LXXVL, fig. 208. The depth reported by Vaillant, 

 1888, for Callionymus phaeton Giint., taken by the steamer " Talisman " off the 

 Azores, is three hundred and six fathoms ; this author also notes a depth of 

 two hundred and forty-three fathoms for GoUus Lesueurii Risso, off the 

 European coasts. Species of these genera among the collections of the 



