00 CALIFORNIA ACADEMY OF SCIENCES. 



Head 3-|-; depth 5; D. I, 6; A. 19. 



This species is known only from the type. One 

 specimen, No. 7,670; length .235 m. Rio Grand do 

 Sul. Senhor Albuquerque. 



59. Tachisurus fissus. 



Ariiis Jissus Cuv. & Val. Hist. Nat. Poiss. xv, 107, 1840 (Cayenne); 



Giiuther, Cat. Fish. Brit. Mus. vol. v, 172, 1864 (Cayenne); 



Bleeker, Silures de Suriuame, 52, pi. iv, fig. 1, 1864 (Surinam). 

 Galeichthys Jjsshs Jordan, Proc. U. S. Nat. Mus. 188G, 558 (name 



only). 

 Tachisurus Jissus Eigenm. & Eigenm. Proc. Cal. Acad. 2d Ser. vol. i, 



1888, 146 (name only). 

 '/Arms j^uncticulatus Ciiv. & Val. Hist. Nat. Poiss. xv, 108, 1840 



(Buenos Ayres). 

 Habitat: Northern coast of South America. 



60. Tachisurus melanopus. 



Arius melanojnis Giinther, Cat. Fish. Brit. Mus. v. 172, 1864 (Kio 

 Motagua); id. Fish. Cent. Am. vi, 18G6, .393 (name only); Stein- 

 dachner, SB. Ak. Wieu, Ixxiv, 1876, Ichthy. Beitr. iv (Panama). 



Galeichthys melanopus Jordan, Proc. U. S. Nat. Mus. 1885, 366 

 (name only); Jordan, Proc. U. S. Nat. Mus. 1886, 558 (name 

 only). 



Tachisurus melanopus Eigenm. & Eigenm. Proc. Cal. Acad. 2d Ser. 

 vol. i, 1888, 146 (name only). 



Habitat: West Coast tropical America. 



61. Tachisurus spixii 



Pimelodus albidits Spix, Gen. Spec. Pise. 19, pi. vii, fig. 1, 1829 

 (Equatorial Brazil). 



Pimelodus sjnxii Agassiz in Spix. Gen. Spec. Pise. 19, 1829. 



Arius spixii Cuv. & Val. Hist. Nat. Poiss. xv, 76, 1840 (copied). 



Tachisurtis spixii Eigenm. & Eigenm. Proc. Cal. Acad. 2d Ser. vol. 

 i, 1888, 146 (Maranhao; Bahia; Eio Janerio; Para; Santos in Sao 

 Paulo; Abrolhos). 



Arius arenafus Cuv. & Val. Hist. Nat. Poiss. xv, 106, 1840 (Cay- 

 enne); Giinther, Cat. Fish. Brit. Mus. vol. v, 172, 1864 (cop- 

 ied); Bleeker, Silures de Suriname 53, pi. iv, fig. 2, 1864 

 (Surinam). 



Galeichthys arenatus Jordan, Proc. U. S. Nat. Mus. 1886, 558 (name 

 only). 



Arius laticeps Giinther, Cat. Fish. Brit. Mus. v, 171, 1864 (Brit. 

 Guiana; Trinidad). 



Galeichthys laticeps Jordan, Proc. U. S. Nat. Mus. 1886, 559 (name 

 only). 



Habitat: Santos to Surinam. 



