484 DEEP-SEA FISHES OF THE ATLANTIC BASIN. 



anal elongate, similar posteriorly. Caudal rhombic, without filiform rays. Ventrals 

 subabdominal, composed of 6 articulated rays. First four vertebra' elongated. Grill mem- 

 branes separate, free from the isthmus. 



AULOSTOMA, Lacepede. 



Aulostoma, Lacepede, Hist. Nat. Poiss., v, 1*03, 537. — Ginther, Cat. Fish. Brit. Mns.. m, r.3.">. — Jordan 



and Gilbert, Bull, xvi, I". s. Nat. Mns., 390.— Gill, Proc. Acid. Nat. Sci., Phila., 1884, 161. 

 Polypteriehtht/8, Bleeker, Natuik. Tijdschr. Nederlandsch-Indie, IV, 608. 



Aulostomids with body much compressed, teeth rudimentary, and with 8 to 12 dorsal 

 spines. The dorsal and anal oblong, opposite and similar; each with from 23 to 28 rays. 

 Caudal cuneiform. 



AULOSTOMA LONGIPES, Vaillant. (Figure 397.) 



Aulostoma longipes, Vaillant, Exp. Sci. TravaUleur et Talisman, 340, pi. xxvn, fig. 1. 



This species is described by Vaillant from a very small specimen, Ave millimeters in 

 length, in a bad state of preservation from off Morocco in 1,163 meters. It is referred by 

 him provisionally to the genus Aulostoma, and the figure would seem to indicate that his 

 identification is correct. It may possibly be found to be a young of A. coloratum. 



Body elongate, nearly cylindrical; its height about one-ninth, its thickness one-eleventh 

 of its length. Length of the head a little more, than one-third of total length; snout con- 

 tained two and one-fourth times in the length of the head. Diameter of the eye apparently 

 about one-eighth of the length of the head; the interorbital space almost nothing. No 

 trace of scales is visible upon the specimen, and the lateral line is only indicated by a 

 series of pigmentary spots. 



In the place of the dorsal, Vaillant found only a very short fin, placed far back; and 

 an anal exactly similar to it in shape and size. The caudal was mutilated, but appeared 

 to Vaillant to have had no prolonged median rays. Pectorals moderately long. Ventrals 

 composed (as nearly as it is possible to determine) of 6 rays, inserted far back and extend- 

 ing to the base of the caudal, which is long, being more than one-third of the entire length 

 of the body. 



Radial formula : B. 5; A. 9-|- ; V. (j. 



As Vaillant indicates, the only obstacle in the way of considering this the young of A. 

 coloratum is the position and length of the ventrals, and the fact that A. coloratum has 

 not been found in the eastern Atlantic. 



Order PEDICULATI. 



Carpal bones notably elongate, forming a sort of arm, which supports the broad 

 pectorals. Gill openings reduced to a large or small foramen, situated in or near the axils, 

 more or less posterior to the pectorals. No scales. Ventral fins jugular, if present; first 

 vertebra united to the cranium by a suture; epiotics united behind supra-occipital; elon- 

 gate basal pectoral radii reduced in number; no interclavicles; post-temporal broad, flat, 

 simple; superior pharyngeals two, similar, spatulate, with anterior stem and transverse 

 blade ; basis of cranium simple. No air duct to the swim bladder. Anterior dorsal reduced 

 to a few tentacle-like, mostly isolated, spines. {Jordan and Gilbert.) 



ANALYSIS of families of pediculati. 



I. Gill openings in, behind, or below the lower axils of the pectorals; mouth large, terminal. 



A. Pseudobrauchue present; pseudobrachia with two actinosts; head broad, depressed Lophiid.£ 



B. Pseudobranckiie none ; pseudobrachia with three actinosts. 



1. Ventral fins developed; pectoral members geniculated, with elongate pseud- 



obrachia Antennariid m 



2. Ventral fins obsolete; pectoral members not geniculate, with moderate pseudobrachia. (eratiid.e 



II. Gill openings in or behind the upper axils; mouth small, usually interior 02JC.hocephalid.£ 



