STOMIATIDAE 311 



Leptostomias macropogon, n.sp. 



St.257. 24.vi.27. 35°oi'oo"S, io°i8'oo"E. i m. tow-net, horizontal, 55 m. : i specimen, 65 mm. 



Depth of body about 16 in the length, length of head 10. Diameter of eye ^^ in 

 length of head. Maxillary with oblique teeth, the first 2 or 3 larger and nearly erect. 

 Barbel nearly f length of fish ; proximal part of stem black, distal part with white spots 

 and patches, which become larger nearer the bulb and finally unite to cover the black 

 part completely; no filaments or appendages, except just proximal to bulb; bulb about 

 f length of head, slightly curved, narrow at tip ; a series of 4 very small filaments on 

 distal part of stem and proximal half of convex side of bulb ; two pairs of similar fila- 

 ments on distal part of bulb, and between these another filament, to which is attached 

 a minute bulb at the end of a very fine stem. Dorsal 20. Anal 25. Pectoral 10. Pelvic 7. 

 Photophores — in ventral series I-P 10; P-V 47; V-A 22; A-C 11: in lateral series 

 0-V 45 ; V-A 22. 



Fig. 20. Leptostomias macropogon. Holotype. (x |.) [Barbel x 3.] 



Described from a single specimen, 165 mm. in length; holotype of the species. 



Hab. South Atlantic. 



This species may eventually prove to be identical with L. gracilis, Regan and Trewavas, 

 described from four specimens, 70 to 75 mm. in length, but appears to diflFer in the 

 length of the barbel and the structure of the bulb. In a related species, L. ramostis, the 

 length of the barbel is less than ^ that of the fish in an example 56 mm. in length, and 

 nearly | in one of 180 mm. In L. leptobolus it is f in a specimen of 65 mm. and nearly 

 I in one of 95 mm. In Flagellostomias boureei the length of the barbel varies from \ to 

 I that of the fish in specimens measuring from 39 to 322 mm. in length. Assuming that 

 the barbel grows at much the same rate in all these species, one would expect it to be 

 about \ the length of the fish in a specimen of L. gracilis of 165 mm., whereas in that 

 described above it is nearly |. L. macropogon may be distinguished from L. haplocaulus 

 by the form of the bulb and the greater number of P-V photophores, and fromL. longi- 

 barba by the structure of the bulb. 



Bathophilus irregularis, n.sp. 



St. 81. 18. vi. 26. 32° 45' 00" S, 8° 47' 00" W. 4I m. net, horizontal, 650 (-0) m. : i specimen, 

 40 mm. 



Depth of body about 6 J in the length, length of head a little more than 4. Postocular 

 organ large; a small white spot below its anterior part. Dorsal 12 (or 13). Anal 16. 

 Pectoral 3 + 7. Pelvics 21 -rayed; inserted at middle of side, a little nearer to base of 



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