SYNGNATHIDAE 4 , 



St. WS 593. 18. v. 31. 35 36' S, 72° 44' W. 1 m. tow-net, 30-0 m.: 1 specimen, 78 mm. 

 St. WS 762. 16. x. 31. 43 50' S, 65" 01' 51" W. Commercial otter trawl, with seine net attached, 

 67 m. : 4 specimens, 86-110 mm. 



Hab. Both coasts of South America from northern Patagonia to Chile and Peru. 



These young specimens appear to belong to this species, which has not been pre- 

 viously recorded from the eastern side of Patagonia. In the young stages it is very 

 difficult to separate from Syngnathus acicularis, Jenyns, and some of the records of the 

 latter from the coast of Argentina may refer to Leptonotus. 



Fig. 17. Leptonotus blainvilleanus. Specimen from St. WS 762. x 1. 



MACRURIDAE 



Coryphaenoides holotrachys (Giinther). 



Macrurus holotrachys, Giinther, 1878, Ann. Mag. Nat. Hist. (5) 11, p. 24; Giinther, 1887, 

 Deep-Sea Fish. ' Challenger' , p. 136, pi. xxviii, fig. B; Goode and Bean, 1895, Ocean. Ichth., 

 p. 396; Lahille, 1915, Anal. Mus. Nac. B. Aires, xxvi, p. 26, pi. vi. 

 ? Macrurus, sp. (conf. holotrachys), Lonnberg, 1905, Wiss. Ergebn. Schwed. Sudpol.-Exped., 



v (6), p. 9. 

 Coryphaenoides holotrachys, Gilbert and Hubbs, 1916, Proc. U.S. Nat. Mus., LI, p. 144; 

 Devincenzi, 1924, Anal. Mus. Montevideo (11) 1 (5), p. 277. 

 St. WS 818. 17. i. 32. 52 31' 15" S, 63 ° 25' W. Commercial otter trawl, 278-284 m.: 4 speci- 

 mens, 595-630 mm. 



St. WS 819. 17. i. 32. 52° 41' 52" S, 62° 39' 30" W. Commercial otter trawl, 312-329 m.: 

 2 specimens, 560, 600 mm. 



Snout rather produced (for a Coryphaenoides); mouth rather wide, the maxillary 

 extending to below middle of eye or a little beyond ; infraorbital ridge fairly prominent. 

 Teeth forming a band in the upper jaw, those of the outer series somewhat enlarged ; 

 teeth of the lower jaw in several rows anteriorly, uniserial laterally. Barbel less than 

 \ diameter of eye, which is greater than length of snout and 2§ to nearly 3 in length of 

 head; interorbital width 5 to 5^. Dorsal II 9; serrations on spine feeble but quite 

 distinct ; distance from second dorsal \ or less than \ length of head. Origin of anal at 

 distance from head equal to about £ length of head. Pectoral with 17 to 19 rays; 

 \ to f length of head. Pelvics with 8 rays, outer ray filamentous, extending f to § of 

 the distance from base of fin to origin of anal. Scales with a strong median spinule- 

 bearing keel, flanked by several short rows of very small spinules, which are more or 

 less parallel with the median keel or converge towards it; some of the scales on the 

 sides of the head with 3 series of spinules converging anteriorly ; 5 or 6 scales between 

 dorsal fin and lateral line. 



Hab. Coasts of Uruguay and Argentina; Patagonian-Falklands region; Straits of 

 Magellan(P). 



It is with some hesitation that I have identified the above specimens with C. holo- 

 trachys, since the type of that species is only 220 mm. in total length and accurate 



