328 
ACTIN0P1ERYGII. 
Genus RITA, Bleeker. 
[Verhaud. Natuurk. Ver. Nederl. Ind. vol. iv. 1858, p. 00.] 
Closely resembling Chrysichthys and Macrones, but teeth on 
palate granular or molariform. Posterior border of supraocoipita 
plate notched to receive the basal bone of the dorsal spine. 
Existing in the freshwaters of the East Indies, and probably 
represented in the Pliocene of India by the following species, o 
which there are no remains in the Collection : — 
Rita granditcutata , II. Lydekker, Palmont. Indica, scr. x. vol. hi. 
(1880), p. 251, pi. xxxvii. fig. 3.— Siwalik Formation ; 
Punjab. [Very largo basal bone of dorsal spine ; Indian 
Museum, Calcutta.] 
Genus AMIURUS, Rafinesquc. 
[Ichthyol. Ohioensis, 1820, p. 65 (Ameiurtts).] 
Head depressed and covered with soft skin ; teeth minute, con 
fined to the premaxilla and dentary. Pectoral fins with robus 
spine, serrated on the posterior border; pelvic fins with eight rajs- 
behind the dorsal fin, which is far forwards and comprises one robust 
spine and six divided rays; adipose dorsal short or of moderate 
length ; anal fin of variable extent ; caudal fin forked or truncate! . 
Skin naked. 
A North-American and Chinese genus. 
Detached vertebrae have been provisionally assigned to this genus 
under the following names : — 
Amiurus cancellatas, E. D. Cope, Contrib. Canadian Pakeont. 
(Geol. Surv. Canadal, vol. iii. (1861), p. 3, pi. i- fig*' 
Lower Miocene; Cypress Hills, N.W. Territory, Cana a. 
[Canadian Geol. Surv. Museum, Ottawa.] 
Amiurus maconnelli, E. D. Cope, ibid. p. 4, pi. i. fig®- *’> ' • 
Ibid. [Ibid.] 
A genus closely related to the existing Pimelodus is represente 
by the following specimen : — 
P.9010. Imperfect fish in Tertiary lignite; Taubate, Province 
San Paulo, Brazil. „ 
Presented by John N. Tervet, Esq., 1 
