DISCUSSION OF SPECIES AND THEIR DISTRIBUTE ).V. 389 



Cephalic appendage reaches nearly to base of first dorsal, its length (lo millimeters) 

 ■M in total. 



Distance of dorsal from snout (17 millimeters) -h in total; thai of anal the same 



Tin' dorsal ami anal (iiis received iii a groove formed by the scales along their bases. 



Anterior portion of second dorsal and second anal Less elevated than in /»'. Macclellandii. 

 The differentiations between the developed and undeveloped rays of the anal arc so slight 

 thai the limits of the so-called anterior and posterior sections of tlie fin can not be 

 determined. 



Length of the longest anal ray (22 millimeters) about 2 in body length. 



Radial formula: 1). 1 + 15-16; A. 15-16 + a; (7 or 8) + 21-22. 



Specimens were obtained by the Blake at the following stations: xcix, off Granada, 

 90fathoms; oxiii, off Neris, 305 fathoms; clxxxv, hit. 25° 33' N., Ion. 84° 21' W., 101 

 fathoms. 



Family MACRURID^E. 



Macruiidir, BONAPARTE, Nuovi Annali Sci. Nat. (857), 1838, 132; Catologo Motodico, 1876, 41. — Gunther, 

 Cat. Fish. Brit. Mus., it, 390.— Gill, Arr. Fam. Fish., ls72, 3 (No. 16); Johnson's Cyclopaedia, n, 1614; 

 Proc. Acad. Nat. Sci. l'liila., 1864, 174. — Jordan and Gilbert, Bull, xvi, U. S. Nat. Mus., 811. 



LepidoUpridw, Swainson, Hist Nat. Fish., 1839, n, 179. 



Lepidosomatidai, Adams, Man. Nat. Hist., 1861, 101. 



Gadoidea with body terminating in a tapering, long, and compressed tail, and covered 

 by keeled or ornamented scales. Teeth villiform or cardiform, in bands in jaws. Premax- 

 illary protractile. First dorsal near the head, distinct and short; second of feeble rays, 

 similar to the anal, the two encompassing the tail. No differentiated caudal. Ventrals 

 thoracic or jugular and of several rays. Pseud obranchiae none. Air-bladder present. 



SYSTEMATIC KEY TO THE SUBFAMILIES AND GENERA. 



(After Gunther, modified and extended.) 



I. A fold of membrane of gill-cavity across terminal portion of first branchial arch. Barbel present. 4 

 nil Is. No pseudobranchise Macruiinu 



A. Teeth in villiform bands above and below, that of the lower jaw always broadest near the symphysis, 



and sometimes tapering into a series on the side of the jaw. 



1. Scales distinctly imbricate, without enlarged dorsal scales. 



a. Scales Bpinigerous. 



Mouth inferior; infraorbital ridge more or less distinct. Dorsal spine serrated... MACRURUS 

 Mouth entirely at the lower side of the head, a longitudinal ridge dividing the infraorbital 

 region into a vertical and subhorizontul portion. Dorsal spine smooth. 



CCELORHYNCHU8 



Mouth wide and lateral. 



Dorsal spine finely barbed Coryph-ENOIDES 



Dorsal spine smooth Hymenockpiialus (=Mystaconurus) 



h. Scales smooth Lioxurus 



2. Scales indistinct, the wholes skin covered with villosities TraCHON'URUS 



3. A series of enlarged scales along the base of the dorsal ami anal tins Crn inurus 



B. Intermaxillary heterodont. \\ ith an outer series of strong, widely-set teeth, anil an inner villiform 



band; mandibulary teeth uniserial. 



1. Dorsal spine Berrated Chalinura 



L'. Dorsal spine smooth Optonurus 



('. Intermaxillary teeth uni- or biserial; mandibular; teeth uniserial. 



1. Dorsal origin m er origin of pectoral. 



a. Ventrals short and weak, pectorals placed very high, opposite upper angle of gill-cleft; lat- 

 eral line originating at upper angle of gill -c left . Muei tenuis ea \ i ties wide. Dorsal 



spine smooth. Scales small, bristly Malai ocephalus 



2. First dorsal behind origin of pectorals. Mnciferous cavities small. 



a. Dorsals separated by a considerable space. Dorsal and anal similar in height and appear 



aneo NEMATONURUS 



b. Dorsals subcontnuous. Anal much higher than second dorsal MOSELEYA 



D. Intermaxillary teeth villiform ; mandibnlary teeth uniserial. 



1. Dorsal, ventral and pectoral origins nearly in the same vertical. Pectorals very long, spatu- 

 late Abyssicola 



