DISCUS.SION OF SPECIES AXn THEIR DISTRIlJUTIOy. 501 



Teufcicle represeiititis first .lorsal liii retractile, with dilated trilobate tip. Soft dorsal 

 liii seven-rayed, inserted posterior to discal inargin. 



Anal fin behind dr>rsal. Pectorals median, carpus narrow, sli-htly exserted, horiy.on- 

 tally placed. 



Bctodenn covered with numerous and strong stellular spines, above and below; the 

 spines being partiimhirly strong and three-pointed at the margins of the disk. Tongue, air 

 bladder, and pyloric apixMulages wanting. 



DIBRANCHUS ATLANTICUS, I'etehs. (Figure 113.) 



]r,hn(nchi(x (itlaiilicii^, Peters, Mon.atsburi.-htc, Krmiglich ProMssiscUeu Akadciiiii', Wissenscliaften, Horlin, 

 1875 (7(j) 73G), Coll. of H. M. 8. (fa:cllc, coast of W. Al'iica, lat. 1(P 12' !)" N; lou. 17^ 25' 'y' W; d.^i.tli, 

 360 fills.); jilato with 5 figs.— GilN'THRit, Cliallcug«r R.'p., .xxii, 59.— V.ui,i,axt, Travailleur, 1888, 313. 



ffnlieiita'tt seiitirosa, GoODK, Proco.'ilings U. 8. Nat. Mus., iii (sig. 2iJ, Jan. 31, 1881), 67. (Coll. of U. .S. F. 

 C, 1880, off Newport, K. I., ileptlis 225 ami 238 fms.),— Jorimn ami Cilbekt, Bull, xvi, U. S. Nat. 

 Mus., 851. 



A species of TUbniiirhus with orbicular disk, nearly as wide as long; its length about 

 half that of the body ; its lateral outline prokmged on each side, and terminating in a strong 

 spine, armed at the tip with a group of irregularly arranged acicular spiuelets. Body cov- 

 ered above with numerous stout, conical spines with stellular bases. These are largest 

 upon the trunk, where they are approximately arranged in about four irregular longitudinal 

 rows upon each side of tiie dorsal fin. Closely set rows of these stout spines mark the outer 

 margin of the disk, and tliere is also a cluster of five to seven upon each carpal peduncle. 

 Outside of these marginal spines, npon each side, is an irregular marginal row of fl\e de- 

 pi'essed, knife-like spines, each tipped with a crown of three acircular spinelcts. On the 

 anterior margin of the disk the two rows coalesce to a greater or less extent and form a 

 bristling array of closely set spines, some pointing dorsally, some laterally, souic \entrally. 

 There are two kinds of spines upon the dorsal surface, in addition to the large ones already 

 described ; some large, somewiiat remote from each other, conical, stellular ; others, mmdimore 

 numerous and tilling the interspaces, jiricklelike, stellular. Belly armed with nunu!rou.s 

 closely set spines of a similar kind. Hnoiit somewhat projecting, armed with three many- 

 tipped spines. A spiue-armed ridge in front of the eyes, over the top of the snout. In this 

 4 sj)ines are conspicuous, one in front of each eye, and between these a larger pair, in front 

 of the supraorbital ridgc^s. From these last-mentioned spines extend siiiue-armcd ridges 

 along the upper margins of each orbit. Under the snout is a cavity (horizontal diameter 

 J that of orbit) containing a barbel, pedicelled, with thick, club-shaped, trilobate tip. On 

 each side of this cavity are the nasal openings, wliii'h are as in ITaliculirhthys. 



The width of the mouth is equal to the distance betweeu the centers of the pupils of 

 the eyes. 



The diameter of the orbit is contained as follows in other dimensions of the body: lu 

 total length, 9J; in distance from snout to dorsal, 0; same to anal, 7; the base of ventrals, 

 3; to angle between pectorals and trunk, r,i; to gill opening, o; in greatest width of disk, 

 5i; of trunk, 4. Width of interorbital area in diameter of orbit, |. 



Dorsal tin with (i or 7 rays, the longest (.id) li times diameter of orbit, and <> times in 

 total length. Anal fin inserted entirely behind dorsal, with -1 rays, the longest (3d) about 

 as long as longest in dorsal tin. Ventral tins inserted nearly under middle of disk, a little 

 nearer to vent than to mandibular symphysis, with one rudimentary and five well developed 

 rays, increasing in length posteriorly, the last and longest fi.^ times in total. Distance 

 between ventral (n-igins, 7i in total length. 



Pectorals with peduncles slightly exserted, bases incbideil in common membraue, com- 

 posed of 13 to 15 rays, the longest (3d or 4th) 4^ in total. 



Caudal flu rounded, consisting of 9 rays, all bitid or ti idd except the two external 

 ones; length of middle ray, about half that of trunk and exceeding that of the pectoral, 

 being contained 4;^ times in total length. 



