122 OSTAEIOPHTSI. 



Hah. Pacific Coast of Mexico and Central America : 

 Altata in Sinaloa ^ ; Panama i - 3 4_ 



Here described from a single specimen from Panama (I)oiv), 280 mm. in total 

 length. 



Ketuma insculpta, Jord. & Gilb. (.lord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1900, 

 p. 2765), from Panama, is evidently very closely allied to G. kessleri and may be 

 identical with it. 



5. Galeichtliys platypogon. (Tab. XVII. fig. 1 and Tab. XIX. fig. 5.) 



Alius platijpoyoii, Giintli. Cat. Fish. v. p. 147 (18G-t) '; Steiud. Sitzuiigsb. Ak. Wien, Ixxii. 18~G, 



p. 5G~ '. 

 Nttuma platypogon, Jord. & Everm. Bull. U.S. Nat. Mas. xlvii. 1900, p. 27G7'; Gilb. & Starks, 



Mem. Calif. Ac. Sci. iv. 1904, p. 28''. 



Depth of body 5 to 6 in the length, length of head .3| to 4^. Breadth of head about l^^ in its lengtli, 

 diameter of eye 5 to 6. Fontanel produced backwards into a groove which reaches the parieto-ocoipital ; 

 occipital process with a keel, usually longer than broad, subtriaagular, with straight sides and truncated 

 apex ; dorsal shield small, subcrescentic. Width of mouth i the width of head ; prasmaxillary band of 

 teeth 4 to 5 times as long as broad ; vomerine, palatine, and pterygoid patches of teeth sometimes separate, 

 sometimes forming a continuous band, the rather narrow vomerine strip connecting the large subtriangular 

 palato-pterygoid patches. Maxillary barbel extending to base or middle of pectoral. About 10 gill- 

 rakers on the lower part of the anterior arch. Dorsal I 7 ; spine about | the length of head ; adipose 

 tin shorter than the dorsal. Anal IS. Pectoral spine | to |^ the length of head, woakly serrated. 



Hab. Pacific Coast from Lower California to Peru : 



Lower California ^ ; Mazatlan in Mexico ^ ; San Jose in Guatemala ^ ; Panama '* ; 

 Peru -. 



Here described from the types of the species from San Jose (Godman £■ Salvin), and 

 a specimen frum Mazatlan (Jordan), five e.xamples measuring from 150 to 240 miu. in 

 total length. 



'Cj- 



6. Galeichtliys assimilis. (Tab. XVI. fig. 2 and Tab. XIX. fig. 4.) 



Arius assunlUs, Giititli. Cat. Fish. v. p. 14G (1864) '. 



Depth of body 5 in the length, length of head 3|. Breadth of head ] j in its length, diameter of eye 7. 

 Fontanel not produced backwards into a groove ; occipital process with a feeble keel, broader than long, 

 subtriangular, with truncated apex [ind straight sides ; dorsal shield subcrescentic, larger than in related 

 species, its length in the middle line eijual to the breadth of the posterior extremity of the occipital 

 process. Vi'idtli of mouth slightly more than i the width of head; pra;maxillary band of teeth 5 times 

 as long as broad ; vomerine patches of teeth separate, continuous with the larger club-shaped palatine 

 patches. Maxillary barbel nearly reacbirjg the base of pectoral. 11 gill-rakers on the lower part of the 

 anterior arch. Dorsal I 7 ; spine i the length of head ; adipose tin nearly as long as the dorsal. 

 Anal 19. I'ectoral spine ^'^ the length of head, with the inner edge rather strongly serrated. 



Ilah. Guatemala, Lake Yzabal ^ {Godman & Salvin). 



Here desciibed frcnn the type, a specimen measuring .500 mm. in total length. 



