360 



DEEP-SEA FISHES OF THE ATLANTIC BASIN. 



PIIYCIS ClIESTERI, Goode and Bean. (Figure 313.) 



I'kycis Chcsteri, GooDE anil Bean, I'loc. U. S. Nat. Mus., i, 1878, 256; Cat. Fish. Essiix Co. and Mass. Bay 

 lH7i), 8; Amor. .Tour. Sci. and Arts, xvil, Jan., 1879, 40. — Goode, Proc. U. S. Nat. Mus., iii, 337, 476. — 

 Joni>AX aud Gilbert, Bull, xvi, U. S. Nat. Mus., 799. 



Head coiitaiiieil in body (without caudal) 4J times, height of body 5 times. Diameter 

 of orbit in length of head 3 J- times, maxillary twice. Barbel about one-third of diameter of 

 orbit. Vent situated under 12th ray of second dorsal, and equidistant from tip of snout 

 and end of second dorsal. Distance of dorsal fin from snout equal to twice the length of 

 the mandible; th(> third ray of the first dorsal is extremely elongate, extending to a point 

 (33d ray of second dorsal) two-thirds of the distance from snout to tip of caudal, its length 

 more than twice that of the head, and more than four times as long as the rays imme- 

 diately preceding and following it. Anal fin inserted immediately behind the vent, its dis- 

 tance from the root of the ventrals equal to that of the dorsal from the snout. As in the 

 other species of the genus,' tlie ventral is composed of 3 rays, the first two much pro- 

 longed. The first is contained three times in the length of the body, the second is almost 

 three times as long as the head, reaching to the 40th anal ray or | of the distance from 

 snout to tip of caudal; the third is shorter than the diameter of the orbit. 



The i^ectoral is four times as long as the operculum. Scales large and thin, easily 

 wriidiling with the folding of the thick, loose skin, particularly in the median line of the 

 sides of the body. Lateral line much broken on the posterior half of the body. 



Scales 7, 90-91, 28. 



Kadial formula: D. 9 or 10, 55 to 57; A. 56; C. 5, IS to 21, 5; 1'. 17-lS; Y. 3. 



TABLE OV MEASUREMENTS. 



CluTCDt number of specimen . 



Locality . 



Extreme length (cxeluflive of caudal) 



Length to end of middle caudal ravs 



Body: 



Greatest lieight 



Greatest width 



Height at ventrals ■ 



Least height of tail 



Head: 



Greatest lergth 



Length of b.arbel 



Greatest width 



Width of interorbital area 



Length of snout 



Length of operculum 



Length of maxillary 



Length of mandible 



Distance from snout to center of orbit. 



Diameter of orbit 



Dors.al (first) : 



Distance from snout 



Length of base 



Length of tirst ray 



Lengtli of second ray 



Length of tbir<i ray 



Length of fourtli ray 



Leugtli of last ray 



Dorsal (second) : 



Length of base 



Length of first ray 



Length of longest ray (40tli) 



Length of last ray.. I 



21, 840. 



Trawl 174. 



42 miles E. J S., 

 Cape Ann, 140 

 fathoms, Aug. 

 27, 1878. 



Milli- 

 meters. 



lOOths of 

 length. 



242 



280 I 



49 



28 



39 



9 



56 



G 

 29 

 10 

 15 

 13 

 28 

 32 

 24 

 17 



67 

 17 

 15 

 28 

 117 

 2C 

 3 



142 



15 



29 



5 



20 

 llj 

 16 

 4 



^ 



115 

 H 



6i 

 5* 



11* 



13 



10 



27i 



7 



6i 

 llj 

 48 

 lOi 



li 



58 

 6J 



lis 



2j^ 



21,841. 

 Trawl 194. 



21. 842. 

 Trawl 194. 



33 miles E. by S., Cape Ann, E. I't., 

 110 fathoms, Aug. 3], 1878. 



Mill!- lOOths of Milli- 

 meters, length. meters. 



143 

 106 



29 



128 



148 



lOOths of 

 length. 



' A critical study of the ventral tins of Phycla comijels us to believe that the ventral fin is composed of 

 3 r.ays covered at the base witli a thicli skin in such manner as to obscure the third, short one, and to join 

 the other two so tliat they appear lilie a single biiid ray. In young individuals of Phycis cliuss, the third 

 ray has it.s extremity protruding from the sheath, thoufjli in adults it becomes entirely enveloped, thus giv- 

 ing rise to the false definitions which have l)ecn given lor tliis genus. An adnlt specimen oi I'hycia J'lircutun 

 Flem. (No. 17371 of the National Muaoum collection), has t he tliird ventral ray protruding. 



