DISCUSSION OF SPECIES AND THEIR DISTRIBUTION. 37 



ALEPOCEPHALUS AGASSIZII, Goobe and Bean. (Figure 45.) 



JlrpoccphaJus Agassicii, Ooode ami Bean, Bull. Mus. Comp. Zoiil., x, 218, 1882. — Joriiax, Cat. Fish. N. Amer., 

 1885, 3i. — GixTHER, Challiuyir Report, xxii, 223. 



Height of body slightly more than five times in its length ; its width about half its height; 

 caudal rays .somewhat compressed. Least height ofthe tail, 12 times in length of the body. 



Scales ovate-lanceolate, parchment like, smaller than in ^4. Bmrdii (the specimen is 

 almost denuded of scales, and their arrangement in the drawing has been in part made out 

 from their impressions upon the skin). There are DO scales in the hiteral line, 10 between 

 lateral line and origin of dorsal, 11 between same and origin of anal. Base of dorsal is 

 squamose, anal slightly so. 



Head somewhat coni]iressed, its length contained .3 times la the length of the body, 

 slightly exceeding twice the length ofthe lower jaw, and 1 times the least height of tail. 

 Snout conically elongate, the lower jaw slightly produced. Width of head slightly less than 

 length of operculum, and O.J times in length of body. Dentition as in A. Bmrdii. 



Length of snout half that of mandible, which is one-sixth of total length. Diameter 

 of orbit 10| in total length of body. 



Insertion of dorsal immediately above vent; the distance of its origin from the base of 

 middle caudal rays equal to one-third of distance from same to anterior margin of orbit, 

 and at distance from snout much greater than two-thirds total length of body. The length 

 of its l)ase is eipial to one-eighth of total length. 



Origin of the anal is under second ray of dorsal; its length of base slightly more than 

 one-seventh of body length, and equal to height of the body at vent. 



Distance of pectoral from snout equal to one-third of body length and 4i times least 

 height of tail. Its length equal to the diameter of orbit and contained lOi times in total 

 length. Origin of pectoral is close behind the end of the opercular flap, while in A. Buirdii 

 it is separated therefrom by four rows of scales. 



Distance of ventral from snout considerably less than twice the length of the head. Its 

 length (probably) about one-sixth that of the head. 



Eadial formula: D. 15; A. 17; C. 19; P. 11; Y. 1, .-)(!); L. lat. 00. 



Color dark, head and fins nearly black. 



A single specimen was obtained at station 338, in 922 fathoms, lat. 38° IS' 40" K, Ion. 

 73° 18' 10" W. 



Other si)ecimens were obtained by the Albatross as follows: No. 3S209, U. S. X. M., Sj 

 inches in length, in 36o 30' N. lat., 7i° 33' W. Ion., at a depth of S.W fathoms; Xo. 3.5518, 

 U. S. N. M., from station 2201 in 39° 39' 45" iS\ lat., 71° 35' 15" W. Ion., at a depth of 538 

 fathoms; No. 33391, U. S. N. M., from station 2072 in 41° 53' N. lat., C5o 35' W. Ion., at a 

 depth of S5S fathoms; No. ,3.3377, U. S. N. M., from station 2075 in 41° 40' .30" N. lat., 05° 

 35' W. Ion., at a depth of 855 fathoms; No. 33325, U. S. N. ]M., from station 2051 in 39° 41' 

 N. lat., 690 20' 20^' W. Ion., at a dejith of 1,106 fathoms; No. 35030, U. S. N. M., from sta- 

 tion 2233 in 380 36'30"N. lat., 73^ 00' W. Ion., at a depth of 020 fathoms; and two others, 

 one from station 2530 in 40° 53' 30" N. lat., 60° 24' W. Ion., at a depth of 956 fathoms, 

 and one from station 2117 in 15° 24' 40" N. lat., 63o 31' 30" W. Ion., at a de])th of 683 

 fathoms. 



ALEPOCEPHALUS PRODUCTUS, Gill. (Figure 46.) 



.llepoccpltfiluxpidihiciiiK. ( lu.L ,Pr()c. U. S. Xat . Mus., \i, 1883, p. 256.— Gixtiifi:, Cliallcugrr Prpnit. 1S87. ii. 223. 



An Ah'poccphdhis rcscndiling A. Ajjassizii in iorm and jiroportions, but with larger 

 scales, smaller eye, and long(T snout. 



The body is quite robust, its height at the pectoral origin nearly one-fourth of the length 

 from the snout to the base of the median caudal rays. Least height of the tail about onc^- 

 half the body in length. Tlui head forms more than one third (35.5) of the total length. 

 The snout equals one-third of the length of the head, the eye nearly one-fourth, and tlic 

 posterior margin of the orbit is nearly ecjuidistant between the snout and the opercular 



