330 DEEP-SEA FISHES OF THE ATLANTIC BASIN. 



opening. Head very cavernous, with the sinuses very conspicuous in preserved specimens, 

 and with numerous, rather strong spines upon the upper part of the opercular apparatus 

 and the head. Teeth on jaws, vomer, and palatines. No traces of scales upon the head. 

 Character of lateral line unknown. Dorsal beginning somewhat behind the vertical from 

 the axil of the pectoral. Anal close to the vent; its distance from the base of the pectoral 

 is about equal to the length of the head. Pectorals broad, very feeble. Ventrals feeble 

 and short, each composed of two rays, the inner one the more abbreviated. 



This genus is provisionally proposed for the reception of the two species referred by 

 Vaillant to our Porogadus, to which they evidently do not belong, being separated not only 

 by the structure of the head and the shape of the body, but by the absence of the triple 

 row of pores, which replace the lateral line in that genus and Penopus. The characters 

 presented are gleaned from the descriptions of Vaillant, and are. in the absence of specimens, 

 offered only as tentative. 



CELEMA NUDA, (Vaillant), Goode and Bean. 



Porogadus nudus, Vaillant, Exp. Sci. Travailleur et Talisman, 262, pi. xxiv, figs. 2-2b. 



Body much elongated, its height one-twelfth, and its thickness one-fifteenth of its 

 length. Length of head one-seventh of that of body; in the specimen as preserved in spirits 

 it is rough, bristly with spines, and has a median crest (the position of these is described 

 at length by Vaillant, but is sufficiently well indicated in the figure). Snout round, liat, 

 its length two-sevenths that of the head. The mouth large, the maxillary passing con- 

 siderably behind the eye. Teeth very line, in villiform bands upon the jaws, vomer, and 

 palatines. Eye conspicuous, its diameter one-fifth the length of the head and equal to the 

 width of the interorbital space. Suborbital distinct, rough. Branchial opening very wide. 

 Preoperculum with a double. margin, each portion of which has three obtuse spines; oper- 

 culum with a single spine. No scales upon the head, the mucous sinuses being very much 

 developed, particularly in the suborbitals and on the margin of the preoperculum Caudal 

 peduncle large, attenuated, nearly filiform posteriorly. Vent a little in front of the limit 

 of the anterior third of the body, and at a distance from the origin of the ventrals greater 

 than the length of the head. Dorsal origin a little behind the base of the pectorals. Anal 

 origin immediately behind the vent. These fins are moderately high, and confluent with 

 the caudal, which is not very long. Pectorals moderate, their length a little more than 

 two-thirds that of the head. Ventrals a little longer than the pectorals, the inner ray 

 slightly shorter than the outer one. Scales almost entirely absent, a few visible in the 

 vicinity of the branchial opening. No trace of lateral line distinguishable. 



Color rosy-white, with the lower parts of the body, sides of head, and the opercular 

 region bluish-black. 



Three specimens were obtained by the French expedition at station xcvui, on the 

 Banc d'Arguin, at a depth of 13,321 meters, and at station ci, off the Cape Verde Islands, at 

 3,200 meters. 



CELEMA SUBARMATA, (Vaillant), Goode and Bean. 



Porogadus suoarmatus, Vaillant, Exp. Scient. Travailleur et Talisman, Poissons, LT>r>, p], xxiv. figs. 3-3r. 



A species closely allied to C. nuda. but with a shorter head, its length only one-eighth 

 that of the body. Interorbital space wider, its width being two ninths of the length of the 

 head, and a little more than the diameter of the eye, which is contained in the length of the 

 head only 5J times. The head is less spinous. The space between the ventrals and the 

 vent a little greater than the length of the head. Scales very deciduous, and lacking on 

 almost all the specimens studied. Vaillant describes the form of one which he found near 

 the opercular opening, evidently an intracutaneous cycloid scale. 



Color like that of ('. nuda, the opercular flap and the abdomen presenting a blackish 

 tint on account of their transparency, the mucous membranes within being exceedingly 

 dark. 



