1910.] NATURAL SCIENCES OF PHILADELPHIA. 611 



enlarged teeth in upper jaw. Agassiz's acount, however, is too incom- 

 plete for positive identification. Regan has examined Agassiz's 

 type and says it has a much broader snout than C. platostomus, or its 

 width at mouth angles 2% in upper jaw length. C. megalops shows 

 rictus width 2f in snout length. Regan also thinks C. zadockii Du- 

 menl may be identical with C. grayi Agassiz, though DumeVil 

 gives eye 1-2^- in interorbital, and about 2 in postorbital to pre- 

 opercle edge, besides smaller scales as 61 or 62. The type of C. grayi 

 is 600 mm. and the examples of C. zadockii 620-660 mm. 



(Msyaloip^ large-eyed.) 

 Cylindrosteus tristcechus (Schneider). PL XXXVIII, fig. 17. 



Head 3f-3f; depth 2§-3£ in head; D. 7-8; A. 8; P. 13-14; V. 6; 

 scales 61-63; predorsal scales 51-53; scales around trunk middle 

 58-61; snout If in head; eye 2f— 2£ to opercle; interorbital f-f; 

 eye in interorbital 4; length 1067-1340 mm. Mississippi R. 1 from 

 Dr. Anderson, and 1 from same basin in Louisiana from Dr. S. G. 

 Richardson (figured), both dry skins. Also 2 others without data 

 and 1 dry head. 



I allow the identification of the Cuban and Mississippi Valley forms 

 as Dumeril, who has examined some of the former, gives the eye in 

 agreement with my Mississippi R. examples, though Poey's figure of 

 Lepidosteus manjuari shows the eye only 2 in postorbital to opercle. 

 Lepisosteus spatula Lac, L. albus Raf., L. ferox R., Lepidosteus (Atrac- 

 tosteus) berlandieri Gir. and A. lucius Dum. are other synonyms. 

 Cylindrosteus tropicus (Gill). PI. XXXVIII, fig. 18. 



Head 2 T %; depth 2f ? in head; D. 8; A. 7; P. 14; V. 6; scales 53; 

 predorsal scales 47; scales around trunk middle 45; snout If in head; 

 eye 2 to opercle; interorbital f ; eye 2\ in interorbital ; length 770 mm. 

 Nicaragua, 1 from Dr. J. F. Bransford. • 



AMIATLD^i. 

 Amiatus oalvus (Linnaeus). 



Erie, Pa., 1; L. Erie, 1; Ithaca, N. Y., 1; Maryland, 1; Mississippi 

 Valley, 1; also 15 others without data and 1 a dry skin. 



