EELS OF THE GENUS CONGER KANAZAWA 247 



I am placing this species with C. myriaster until the type can be 

 examined. 



Conger orhignyanus Valenciennes 



Figures 2, 3, 5; Plate 1,e 



Conger orbignyarms Valenciennes, 1847, p. 10, Atlas, pi. 12, fig. 1 (type locality, 

 South America). — Evermann and Kendall, 1906, p. 76. — De Biien, 1950, p. 66. 



Conger muUidens Castelnau, 1855, p. 84, pi. 44, fig. 1 (Rio de Janeiro).— Glinther, 

 1870, p. 40. 



Conger vulgaris Giinther, 1870, p. 38 (in part), item "k" (South America). — 

 Perugia, 1891, p. 656 (Montevideo).— Berg, 1895, p. 23 (Mar del Plata, 

 Montevideo). 



Conger conger Giinther, 1870, p. 13 (La Plata).— Tortonese, 1939, p. 72 (Monte- 

 video). 



Lcplocephalus conger Jordan and Davis, 1892, p 684 (coast of Brazil). 



Leptocephalus orhignyanus Devincenzi, 1924, p. 183 (Banco Ingles, Maldonado, 

 Montevideo). — Devincenzi and Barattini, 1928 pi. 16, fig. 4. — Carvalho, 

 1943, p. 43. 



Specimens studies: 12 specimens ranging in total length from 603 

 to 1125 mm., from the following locaUties: Uruguay: USNM 87737; 

 Montevideo USNM 22625, SNHM 13492 (2) ; Rio Plata USNM 86726, 

 MCZ 4701. Argentina: Buenos Au-es USNM 55580 (3), SNHM 

 31617 (2). Brazil: Rio de Janeiro MCZ 4711. 



Diagnosis: Pores in lateral line from 44 to 46; vertebrae 160-161; 

 origin of dorsal fin one-tenth to 1 pectoral fin length behind posterior 

 tip of pectoral fin; diameter of eye 12 to 17. 



Description: Tip of snout to origin of dorsal fin 178 to 200, 

 length of upper jaw (to rictus) 39 to 52; length of pectorals 40 to 51; 

 number of compressed teeth in upper jaw 41 to 61; in lower jaw 51 

 to 59; vomerine tooth-patch triangular, 30 to 45 teeth; premaxillary 

 tooth-patch wider than long, with 31 to 45 teeth; vertebrae 55 to 56 

 precaudal, and 106 to 104 caudal (in 2 specimens) ; 9 or 10 preoperculo- 

 mandibular pores; a single supratemporal pore; in one specimen dorsal 

 rays 368, anal 301 ; preorbital bone does not have ossification bridging 

 over sensory canal, pi. 1,e. Additional counts and measurements are 

 recorded in tables 1-3, 5, 6 and in figure 2. 



Geographic range: South America, from Uruguay and Argentina 

 northvv^ard to Brazil. 



Remarks: The distribution of C. orhignyanus may ovrleap with 

 that of C. triporiceps and C. esculentus; however, it can easily be 

 separated by the number of lateral line pores. Also, it may be fur- 

 ther distinguished from C. triporiceps by the single supratemporal 

 pore and absence of postorbital pores. This species is more closely 

 related to C. conger from Europe, but it can be distinguished by the 

 following characters : 



