DISCUSSION OP SPECIES AND THEIK DISTRII3UTI0N. 489 



2. Mimdi-clel't iif;irly h(iri/,i)iit:il; skin .siiinoth ; oii<>, ceplialic, iind one postccpbalic spine.. Oneirodes 



',i. Moiitli-ck'ft oblique; two ceiihalic aud no postceplialic. spines Paroneirodes 



B. Uramliiai in + 2 J pairs; body with scattered tubercular scutelhe; no second dorsal spine. 



Uimaiitolophina; 



1 . Body and bead compressed, nioutli witli cleft obli(|nc ; niaiidibnlai' aiticulatiou under or beliind eye.s 



a. Eyes rudiineutary. 



i. liody obl(Uin-oF«l; dorsal rays about 'J, pectoral about 12 Himanthlophus 



ii. Hody sbort-oval; dorsal iin with 4 rays, aud pectoral with about 17..CoKYNOLOPHi;s. 



2. Body and bead depressed, nu>utli with cleft vertical or inclined forward; mandibular articulation 



under or in advance of snout. 



<i. Eyes small .(Eckoxichthvs 



II. Mouth immense. 



A. Mouth with cleft siibvertieal. Pectoral small, premedian, in advance of dorsal and of gill opening. 



No second dorsalspine deveh>ped. 



1. Brauchia' in 2h pairs Melaiiocetiiia! 



II. (jular tentacle not developed. 



i. Vomerine teeth present Mei.anocetus 



ii. Vomerine teeth absent Etocetu.s 



I). Oular tentacle present. 



i. A single vomerine tooth LiMuriitYXK 



B. Mouth with cleft nearly horizontal. Pectorals l)road, postmiMlian, unili-r dorsal, and lieliind gill 



opening. P.ranchiie in | 2 i pairs ( 'iinliiphripuiiii- 



1. Dorsal aud anal greatly produced. 



o. Skin nakeil; nunuM-ous luminous Ii laments on bead and body Caulophryne 



CERATIAS, Kpoyer. 



Ceratiiis, KrOvek, Naturhist. TidsskriHt., 1.184-4, 039 [tyi)e. ''. i/o/6677i].— Gii.L. Proc. 11. S. Nat. Mus., i, 

 1878, 217 (limited). 



Ceratiids with head ami body ninch (•< impressed and elevated, oblong, with prickly skin. 

 Month iiiodfrate, witli its cleft nearly vertical; teeth in jaw.s of moderate size, conical, mov- 

 able; no teeth on vomer or palatines. Braiiehi:e 2i pairs; arches unarmed. Spinous dorsal 

 reduced to two spines, the cephalic one elongate, with simjjle capitate extremity, the dorsal 

 one with its basal eJement exserted; soft dorsal and anal short; pectorals very short, broad, 

 mnltiradiate (with about 2(1 rays). Pyloric c(eca 2, small. Skeleton soft, fibrous. 



CERATIAS HOLBOLLI. Kroyer. (Figure 3911.) 



Ceriitim thtlhdili, KRi)YK.R, loi\ cit. — Gai.mari>, Voy. Skand.. Poissons, PI. ix. 



This grotesque and remarkable fish is only known tlirongli three specimens, uom IS tt. 

 28 inches long, taken off (Jreenland, and another oft'^N'ova Scotia. 



Giinthcr, in the Study of Fishes (p. 472), erroneously stated that it had been found at 

 the depth of 2,400 fathoms in mid-Atlantic, and corrected his identifications in the Chal- 

 lenijer Report (XXII, p. 53); the form to wliiih lie referred was Ciraiiiix or Mancalias vrttniis- 

 copux. The l)rief diagnosis in Jordan's Synopsis is incorrect, and since the original Latin 

 description of Kroyer is not easily accessible, we quote it in full below. CcrnUas Holbolli 

 may confidently be expected to be found in the a1)yssal waters sontli of Greenland, and 

 inobaljly occurs in the Great Atlantic I'latean.' 



KIn'iVEH's DE-SCRIPTION OF ( IMiATlAS HOLIXiLLI. 



Totus ater. Alfitudo piscis quartam longitndinis partem ferme a-qnans. Cajmt altins 

 (|iiaiii loMgnm, '(, loiigitudinis jiiscis ;c(|uans. Oculi minimi, vicesimam loiigifudinis c!ii)itis 

 partem non superantes. liadius capitis liber longitudine piscis ad basin pinna; caudalis 



'The form described by Giinther under the name CitoHiis hixpiiinnHn, from off Banda Islands, in the 

 Molucca ■■\rehipelago, .at a depth of 3tiO fathoms, resembles in general Mihiiioretii,i Jiihiisnnii. thongli strnc- 

 turally closer to C. Holhiillii. It is much shorter and chunkier, and has two d<irsal spines, the ])osterior of 

 which is rudimentary, (iilnther has used in connection with it (in bis key to the species) the term Diceralitm, 

 no doubt mor(^ with the purpose of preventing others from making his species the basis of a new geuik.-i or 

 subgenus than of himself advocating so limited a generic group. (Giinther, Vhallciiijer Report, XXII, 53, 

 PI. XI, Fig. H.) 



