^44—4 INDIAN TERTIARY AND POST-TERTIARY VERTEBRATA. 
brings up the number to forty-six ; while Signor Botti^ enumerates no less than sixty 
species,* to which he adds the new M. salentims: this list does not, moreover, include 
six North American species described by Prof. J, Leidy.^ A memoir on two species 
(included in Botti’s list) by Signor F. BassanP may be also mentioned. The genus 
commences in the London Clay.^ 
Species. Myliobatis cuevipalatus, n. sp. nobis. 
('From the eocene of Kach.J 
Jlistory. — The specimen on which this provisional species is founded has been 
previously described by the present writer® without a specific designation. 
Dental plate. — The type specimen was obtained by Mr. A. B. Wynne from the 
nummulitics of Kach,® and is figured in plan and section in plate XXXV. figs. 9, 9a. 
It has been split longitudinally in the middle line, and comprises the halves of four 
of the middle teeth, and two entire teeth of the innermost lateral row (a) : the 
median teeth are of considerable antero-posterior diameter. The characteristic 
feature of the specimen consists in, the peculiar contour of the transverse section 
(fig. 9a) : the middle line being considerably depressed, the contiguous portion 
presenting a bold upward curve, and the border showing a sharp descent to the 
lateral plates, which are situated much below the plane of the median line. 
Affinities. — A comparison with the specimens in the British Museum apparently 
indicates the distinctness of the present specimen from each of the thirteen species 
mentioned in the foot-note (4) ; it comes, however, nearest to M. striatus, and presents 
some resemblance to M. micropleurus.’’ Figures of the dentition of five species are 
given by Signor Issel,® and the Indian specimen is almost certainly distinct from all 
of them, although the dental plate of M. ligusticus makes an approach to it in the 
contour of the transverse section. M. salentinus, Botti,® is a much smaller species; 
and M. omhonii, and M. elegans., Bassani,^® appear equally distinct. That the Indian 
form is identical with any of the American fossil species is improbable ; and its 
distinction from all the living species (in which the dental plates are simply convex) 
might be inferred on account of its geological age alone. 
Although the writer cannot be absolutely certain that the present form 
is distinct from all the described species, yet it appears probable that such is the 
1 ‘ Atti. Soc. Tosc Sci. Nat.’ vol. III. pp, 371-382 (1878). 
2 ‘ Proc. Ac. Nat. Sci Philad.’ vol. VII. p 397 (1855), and 1876, pp 80-86. 
3 “ Ittiodontoliti del Veneto”—8vo Padua. (1877). 
4 Dental plates of a considerable number of species are figured by Gervais in the “Zool. et Pal. Francjaises,” 2nd ed. 
pis. LXVII. LXXIX. and LXXX. The following species (which unless otherwise stated are from the English eocene) are 
represented in the collection of the British Museum, viz : 1. M. contractus, Dix. 2. M. dixoni, Ag 3. M edwardsi, Ag. 
4. M. goniopleurus, Ag. 5. M. gyratus, Ag 6. M. heteropleurus, Ag. 7. M. irregularis, Dix 8. M. micropleurus, Ag. 
(miocene. Prance and Malta.) 9. M. nitidw^, Ag. 10. M. punctatus, Ag. 11. Af. stokesi, Ag. (miocene, Malta.) 12. 
striatus, Ag. 13. M. toliapicus, Ag. 
5 ‘ Eec. Geol. Surv. Ind.’ vol. X. p. 43 (1877). 
6 In ‘ Journ. As. Soc. Beng.’ vol XLIX. pt. 2. p. 10 (1880) erroneously said to be from the Punjab. 
7 Vide Gervais op. cit. pi. LXXX. fig. 4. 8 Op. cit. 9 Op. cit. 
10 Vide Gunther “ Study of Fishes,” p. 338. fig. 125. (1880) 
