GONOSTOMATIDAE 281 



with 16 rays. Pelvic 8(?) ; origin equidistant from end of snout and last anal rays. A pair of 

 photophores at the symphysis of the mandibles and about 12 between the branchiostegal 

 rays ; a single photophore in front of the lower corner of the orbit and another in front 

 of the upper part of the operculum ; a single series on the abdomen, consisting of 16 from 

 gill-opening to pelvic, 5 from pelvic to origin of anal, 17 from origin of anal to just behind 

 the last ray, and a group of 3 placed close together on lower edge of caudal peduncle. 



Described from a single specimen, 47 mm. in length. 

 . Hob. Atlantic. 



As has already been pointed out by Jespersen and Taning, these specimens from the 

 eastern Atlantic differ somewhat from those described by Goode and Bean from off the 

 coast of Florida. According to their original account the jaws are "armed with a single 

 series of not very numerous, acicular teeth, uniform in size.. . ." Further, the pelvic 

 and anal fins are further forward in examples from the eastern Atlantic, the anterior 

 anal rays are more produced, and there are differences in the number and arrangement 

 of the photophores. There are, however, certain discrepancies between the description 

 and the figure in Goode and Bean's work, and I follow Jespersen and Taning in identi- 

 fying my specimens as B. pedaliota. 



Genus Margrethia, Jespersen and Taning 

 Jespersen and Taning, 1919, Vid. Medd. Dansk nat. For. lxx, p. 222. 

 Closely allied to Bonapartia, differing in the rather more anterior insertion of the 

 dorsal fin, and in the presence of an adipose fin. 

 A single species. 



Margrethia obtusirostra, Jespersen and Taning. 



Jespersen and Taning, 1919, t.c. p. 222, pi. xvii, figs. 11-12. 



5 + 7+3 gill-rakers on the first arch. Dorsal 16; origin nearer to posterior margin 

 of eye than base of caudal, a little in advance of that of anal. Anal 23-26; anterior rays 

 somewhat longer than those that follow. Pectoral with about 14 rays. Pelvic 8. Photo- 

 phores on head similar to Bonapartia; the single series on the abdomen consisting of 

 14-15 from gill-opening to pelvic, 4 from pelvic to origin of anal, 13 above the anal fin, 

 and a group of 4 placed close together on the lower edge of the caudal peduncle. 



The original description was based on several postlarval and adolescent specimens, 

 6| to 19 mm. in length, all taken at a depth of about 150 mm. 



Hab. Eastern Atlantic. 



Genus Gonostoma, Rafinesque 



Rafinesque, 1810, Ind. itt. Sicil. p. 64. 



Sigmops, Gill, 18S4, Proc. U.S. Nat. Miis. vi (1883), p. 256. 



Neostoma, Vaillant, i888, Exped. Sci. ' Travailleur' et ' Talisman', Poissons, p. 96. 



Cyclothone (part), Goode and Bean, 1895, Ocean. Icbth. p. 99. 



Cleft of mouth wide; both jaws with strong acute teeth set at more or less regular 

 intervals, and with much smaller teeth in the interspaces; a series of minute teeth on 



