LIST OF CENTRAL AMERICAN AND MEXICAN 

 NEMATOGNATHI. 



AMIURUS Rafinesque. 



AmiurilS dugesi Beau Rio Turbio; Guanajuato, Mexico, west of the 

 Sierra Madre. Proc. U. S. Nat. Mus. 1879, 304. 



ICTALURUS Rafinesque. 



Ictalums meridionalis (Gunther) Rio Usumacinta, Guatemala. Cat. 

 Fish. Brit. Mus. v, 102, 1864. 



RHAMDELLA E. & E. 



Rhamdella parryiE. &E. RioZanaleueo near Tonala, Chiapas, Mex- 

 ico. Proc. Cal. Acad. Sci. 2d Ser. i, 130. 



Rhamdella peteneiisis (Giiuther) Lake Peten; Chiapas, Mexico. 1. c. 

 126. * 



Rhamdella brachyptera (Cope) -Mexico. Trans. Am. Philos. Soc. xiii, 

 404. 



Rhamdella baronis miilleri (Troschel ) Pacific coast of Mexico. Mui- 



ler, Wierbelth. Mex. 102, 1865. t 



Rhamdella guatemalensis (Giiuther) Huamuchal; Guatemala; Nicara- 

 gua. 1. c. 122. 



Rhamdellasalvini(Gunther) Rio San Geronimo, Guatemala. I.e. 130. 

 Rhamdella polycaulus (Guuther) Rio San Geronimo. 1. c. 131. 



Rhamdella managuensis (Gunther) Lake Managua. Fish. Central 

 America, 393 and 476, 1866. 



Rhamdella hypselurus (Gunther) Mexico. Cat. Fish. Brit. Mus. v, 126. 

 Rhamdella motaguensis (Giintlier) Rio Motagua. 1. c. 127. 

 Rhamdella laticauda (Heckel) Mexico. Gunther, 1. c. 127. 

 Rhamdella nicaragliensis (Gunther) Lake Nicaragua. 1. c. 125. 

 Rhamdella micropterus (Guuther) Rio San Geronimo. 1. c. 124. 

 Rhamdella godmanni (Giinlher) Lower Vera Paz; Rio Motagua; Mex- 

 ico. 1 c. 124. 



* The difference between Rhamdia, and Rhamdella lies in the fontanels. In Rhamdia 

 there is a frontal fontanel only, in Rhamdella both frontal and occipital fontanels are 

 present. Only the above two species of those inhabiting this region have been examined 

 in this respect. It is doubtful therefore whether the following ones should be placed in 

 one genus or the other. 



i We have not seen this paper and know nothing of this fish. 



