GONOSTOMATIDAE 289 



St. 273. 31. vii. 27. 9° 38' 00" S, 12° 42' 30" E. I m. tow-net, oblique, 118 (-0) m. : 8 specimens, 



33-45 mm- 



St. 276. 5. viii. 27. 5° 54' 00" S, 1 1° 19' 00" E. 1 m. tow-net, oblique, 1 10 (-0) m. : 2 specimens, 

 40-50 mm. 



Depth of body 61 to 7 in the length, length of head 4I to 4! . Snout somewhat longer 

 than eye, diameter of which is 4I to 5:^ in length of head and about equal to interorbital 

 width. About 12 gill-rakers on lower part of anterior arch. Dorsal 10-12; origin about 

 equidistant from base of caudal and anterior margin of eye. Anal 23-30; origin below 

 middle of dorsal. Pectoral with 8 rays. Pelvic 7; origin equidistant from tip of lower 

 jaw and posterior part of anal. Lower series of photophores consisting of g in front of 

 pectoral, 12 or 13 from pectoral to pelvic, 7 or 8 from pelvic to origin of anal, and 20 

 or 21 from anal to base of caudal; there are 19 or 20 photophores in the upper series. 



Fig. 7. Yarrella blackfordi. (x 25.) 



Described from 16 specimens, 28 to 50 mm. in length. 



Hab. Atlantic. 



The above specimens differ in several respects from the description of Goode and Bean, 

 but in view of their small size I have followed Jespersen and Taning in identifying them 

 with that species. 



Yarrella corythaeola (Alcock). 



Diplophos corythaeolum, Alcock, 1898, Ann. Mag. Nat. Hist. (7), n, p. 147; 1899, Illust. Zool. 



'Investigator', Fishes, pi. xxv, fig. 3. 



Photichthys corythaeolus, Alcock, 1899, Cat. Indian Deep-Sea Fish. p. 142. 



Yarrella africana, Gilchrist and Von Bonde, 1924, Rep. Fish. Mar. Biol. Surv. S. Afr. ni (1922), 



Spec. Rep. vn, p. 8, pi. i, fig. 2; Barnard, 1925, Ann. S. Afr. Mus. xxi, p. 148. 



Polymetme illustris, McCulloch, 1926, Biol. Res. 'Endeavour', v, p. 167, pi. xlv, fig. i. 



Depth of body 5 to 6 in the length, length of head 4 to 4f . Snout as long as or a little 

 shorter than eye, diameter of which is 4 to 4:^ in length of head and a little greater than 

 interorbital width. About 12 gill-rakers on lower part of anterior arch. Dorsal 11-12; 

 origin about equidistant from end of snout and base of caudal. Anal 24-32 ; origin below 

 last rays of dorsal. Pectoral with 10 or 11 rays. Pelvic 7; origin equidistant from tip 

 of lower jaw and last rays of anal. Lower series of photophores consisting of 9 in front of 

 pectoral, 11 from pectoral to pelvic, 8 from pelvic to origin of anal, and 22-24 from 

 anal to base of caudal; there are 18-19 photophores in the upper series. 



