46 ON NEW OR INSUFFICIENTLY DESCRIBED FISHES 



Callionymus altivelis Schlegel. In both the branchial 

 foramen is lateral and below the first dorsal, the last dorsal 

 spine is unattached by membrane to the back, and the soft 

 dorsal is very high and has all the rays except the first 

 branched. DcCctylopus, however, differs materially in the 

 increased armature of the preopercular spine and in the 

 presence of a free ventral ray. 



Dactylopus Gill, Proc. Acad. Nat. Sci. Phila., 1859, p. 130 

 (bennetti=dactylopus). 



Vulsus Gunther, B.M. Catal. Fish., iii, 1861, p. 15 (dac- 

 tylopus). 



Dact'^'lopus dactylopus (Cuvier & Valenciennes). 



D. iv,— 8; A. 7; P. 18. Depth of body 6-20, width 

 of body 4-50, length of head 3-50, of first dorsal spine 1-15 

 to 1-50, of caudal fin 2-15 to 2-60, of ventral 2-00 to 2-50 

 in length of body. Depth of head 1-70, width of head 

 1-15, diameter of eye 3-60, interorbital width 8-85, length 

 of snout 2-90, of preopercular spine 3-30, of last dorsal 

 ray 1-05, of last anal ray 1-20 in length of head. 



Body rounded above, its greatest depth below the 

 anterior dorsal rays. Snout as wide as deep, obtusely 

 pointed, its depth 1-25 in its length. Eyes separated by a deep 

 concavity, the supraorbital ridges high and sharp, extending 

 forward on the snout, the diameter 1-30 in the snout and 

 3-00 in the width of the head. Maxillary extending to 

 below the anterior border of the eye. Preopercular spine 

 strong and acute, its distal extremity slightly curved 

 inward ; outer border with four graduated barbs, the 

 anterior median, very strong, and directed forward, the 

 posterior reduced to a mere tubercle rising from the base 

 of the curve ; inner border with three curved subequal 

 antrorse barbs. Occiput with a pair of raised bony bucklers, 

 covered with reticulated sculpture, and separated by a 

 smooth fossa, which is a continuation of the interorbital 

 groove. Gill-openings lateral, opposite the middle of the 

 spinous dorsal, as far apart as the head in front of the hinder 

 margin of the eye, and about twice as far from the eye as 

 from the pectoral fin. Lateral line well defined in front, 

 less so behind, terminating well above the middle of the 

 base of the caudal. 



Origin of spinous dorsal a little nearer to the soft 

 dorsal than to the tip of the snout ; spinous dorsal high, 



