406 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 50. 



the species to the north, and in that case the species in Brazil would 

 stand as Brevoortia aureus Agassiz. 



Table of comparative measurements of Brevootia tyrannus. 



Locality. 



MontevideOjUniguay. 



Cameron, Loiiisi;uia. 



Flor- 

 ida. 



Length to end of middle 



caudal rays mm.. 



Depth! 



Dorsal rays 



Pectoral rays 



Caudal peduncle depth 



Eye diameter 



150 



0.36 



3+16 



0. 165 



.11 



.06 



215 

 0.36 

 3+16 

 0.19 



.10 

 .055 



1 Measurements made in hundredths of body length. 



No other differences of form or scaling were found that were as 

 definite as those given above. The specimens from Louisiana seemed 

 to have about 30 scales between the occiput and the dorsal insertion, 

 as compared to 40 in those from other localities, 



5. ILISHA FLAVIPINNIS (Valenciennes). 



Fristigaster flavipinnis Valenciennes, D'Orbigny, Voy. Amer. M^r. Poiss., pi. 

 10., fig. 2, 1839. Buenos Aires. 



Two examples from Buenos Aires (market?) ''collector Burmeis- 

 ter," and labeled ''Hacha," apparently the local name. 



6. ASTYANAX RUTILUS Jenyns. 



One specimen, 120 mm. long, from Montevideo, a gravid female. 



D. 11; A. 30; scales in lateral line 39; in transverse series 7^6^; 

 gill rakers 9 + 10; head 4f in length without caudal; depth 2|; eye 3; 

 maxillary extending just l^eyond anterior margin of eye; a single 

 tooth in maxillary; dorsal inserted behind ventrals, midway in body 

 length; an indefinite vertically elongate humeral spot and a hori- 

 zontal stripe of black on middle caudal rays; sides with a silvery 

 band. 



7, ACESTRORHAMPHUS HEPSETUS (Cuvier). 



Two specimens, 210 and 225 mm. in total length from Buenos 

 Aires, "collected by Burmeister." These correspond with Stein- 

 dachncr's description and figure.* 



D, 11 ; A. 29; scales 54 or 57, \%; head 3§; depth 3^ in length with- 

 out caudal; eye 4; snout 3f ; intcrorbital space 31 in head. 



8. MENIDIA BGNARIENSIS Cuvier and Valenciennes. 



Six specimens from Buenos Aires are referred to this species, as 

 they correspond in all regards to the description given by Cuvier and 

 Valenciennes, and to the excellent one by Steindachncr,' In the 



> Die Siisswassorfische dos Siidostlichen Brasilien, 1S76, p. 111. 

 2 Ichthyologische Notizen, vol. 6, 1867, p, 31, 



