DISCUSSION OF SPECIES AMI THEIE DISTRIB1 HON. 37 



ALEPOCEPHALUS AGASSIZII, Goode and Bean. (Figure 15.) 



Alepoeephalus Agaasizii, Goode and Bean, Bull. Mub. Comp. Zoiil., \. 218, 1882.— Jordan, Cat. Fieh. N.Amer., 

 1885, 34. — GOnther, Challenger Report, wn. 223. 



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

 caudal rays somewhat compressed. Least heighl ofthe tail, 12 times in length oft he body. 



Scales ovate lanceolate, parchment like, smaller than in A. Bairdii (the specimen is 

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

 from their impressions upon the skim. There are 90 scales in the lateral line, 10 between 

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

 sqnamose, anal slightly so. 



Head somewhat compressed, its length contained 3 times in the length ofthe body, 

 slightly exceeding twice the length ofthe lower jaw, and 4 times the least height of tail. 

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

 length of operculum, and 9J times in length of body. Dentition as in A. Bairdii. 



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

 of orbit 10J 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 snoutmuch greater than two-thirds total length of body. The length 

 of its base is equal to one-eighth of totallength. 



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 10A times in total 

 length. Origin of pectoral is close behind the end of the opercular flap, while in. I. Bairdii 

 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. 



Radial formula: D. 15; A. 17; C. 19; P. 11; V. L, 5(f); L. lat. 90. 



Color dark, head and fins nearly black. 



A single specimen was obtained at station 338, in 922 fathoms, lat. 38 c 18' 40" N., Ion. 

 73° IS' Id" W. 



Other specimens were obtained by the Albatross as follows: No. 38209, U. S. X. M., 8| 

 inches in Length, in 36 30' N. lat.. 74° 33' W. Ion., at a depth of 859 fathoms; No. 35518, 

 V. S. X. M., from station 220J in :\<\- 39' 45" X. lat., 71° 35' 15" W. Ion., at a depth of 538 

 fathoms: No. 33391, U. S. X. M., from station 2072 in 41° 53' X. hit., C5o 35' W. Ion., at a 

 depth of S5.s fathoms: No. 33377, U. S. X. M., from station 2075 in 41° 40' 3D" X T . lat., 65° 

 35' W. Ion., at a depth of 855 fathoms; No. 33325, !'. S. X. 31.. from station 2051 in 39° 41' 

 X. lat., (ill 20' 20" W. Ion., at a depth of 1,106 fathoms; No. 35030, IT. S. N. M., from sta- 

 tion 21';;:; in .is 36' 30" N. lat, 73° oil' \Y. Ion., at a depth of 620 fathoms; and two others, 

 one from station 2530 in 4<)o 53' 30" X. lat., GG° 24' W. Ion., at a depth of 95G fathoms, 

 and one from station 2117 in 15° 24' 40" X. lat., 63° 31' 30" W. Ion., at a depth of 683 

 fathoms. 



ALEPOCEPHALUS PEODUCTUS, Gill. (Figure46.) 

 dlepocephalugproductus,Giub,T?ioe.V. S.Nat. Mns.,vi, 1883, p. 256.— GCnther, Challenger Report, isg?. p. 223. 



An Alepoeephalus resembling A. Agassizii in form and proportions, but with larger 

 scales, smaller eye, and longer snout. 



The body isquite robust, itsheighl at the pectoral origin nearly one-fourth of the length 

 from the snout to the base of rhe median caudal rays. Least heighl of the tail about one 

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



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



posterior margin ofthe orbit is nearly equidistant between the snout and the opercular 





&F 



