1906.] NATURAL SCIENCES OF PHILADELPHIA. 479 



terior series of teeth in upper jaw not separated from anterior by an 

 interspace. Squamous area on base of anal rather low and well 

 defined from marginal part of fin. Adipose fin large, long, not free. 

 A small external short free cultrate predorsal spine. 



(Named for Mr. Alvin Seale, formerly of the Bishop Museum at 

 Honolulu, Hawaiian Islands, the first to offer a complete account of 

 the Ichthyology of Guam.) 



Sealeina lippincottianus (Cope). Fig. 57. 



Myletes lippincottianus Cope, Proc. Amer. Philos. Soc. Phila., XI, 1869-70 

 (August 19, 1870), p. 561, fig. (teeth). Cotype, No. 8,024, A. N. S. P. 

 Para, Brazil. De Schulte Buckow. — —Cope, ^c, p. 566 (type). 



Width of head If in its length ; interorbital space 2|- in head, measured 

 from tip of upper jaw. Edges of body all more or less rounded. 

 Head compressed, becoming a little constricted below. Snout broad 

 and convex. Mouth broadly transverse. Tongue elongate, little 

 free. Interorbital space broadly convex. Gill-opening forward to 

 posterior nostril. Rakers about 10 + 15, lanceolate, about | of pupil. 

 Filaments about f of eye. Tubes in lateral line simple. Color in 

 alcohol pale brassy-brownish, back darker or more brownish from 

 level with upper edge of gill-opening. Fins all more or less plain pale 

 brownish, and without markings. Iris brassy. Length 3f inches 

 (caudal lobes a little damaged). Cotype. 



I restrict the specimen described above as one of Cope's cotypes, as 

 it is possible his description is based on more than one example. The 

 statements that there are 32 abdominal serratures and that the adipose 

 fin is f the length of the rayed dorsal do not agree with my example. 



Metynnis luna Cope. Fig. 58, 



Proc. Amer. PhUos. Soc. PhUa., XVII, 1877-78 (May 17, 1878), p. 692. 

 Type, No. 21,443, A. N. S. P. Peruvian Amazon. Prof. J. Orton. 



Width of head 2|- in its length ; interorbital space 2^. Body greatly 

 compressed. Snout broad and with surface convex. Lips thin. 

 Teeth rather small, above with both series close together, 5 on each 

 side externally and 4 annectant transversely. In mandible 4 on each 

 side, median 4 largest, and in turn middle pair each with a large pos- 

 terior cusp. Each tooth with at least a median point, those of man- 

 dible also with cutting edge, and inner series of upper jaw with 2 cusps 

 to each tooth. Tongue not free, thick. Interorbital space broad and 

 convex. Gill-opening forward to front margin of pupil. Rakers 

 26 + 26?, slender, about y of eye, and filaments about f of latter. 

 Some of tubes in lateral line simple. Color in alcohol brownish, back 

 somewhat dark and plumbeous, and all of lower regions brassy and 



