PHARUS. 217 



F^^/«%— SOLENID.E, Lnmarrh. 



Gemis — Pharus, Lench in J. 7?. Grni/, 1847. 



(' Syuops. Brit. Mas.,' e<l 42, 1840, p. 154 ; ' Anu. Mag. Nat. Hist.,' vol. xx, 1847, p. 272 ; 



and ' Proe. Zool. Soc.,' 1847, p. 189.) 



Pharus Waeburtoni (Forhes), 184.3. Plate XXXV, figs. ]— 3. 



1845. SoLECUETUs Warbtjrtoni, E. Foi-hes. Quart. Journ. G-eol. Soc, vol. i, 



p. 237, pi. ii, fig. 1. 

 1850. — —A. (VOrbigny. Prodr. de Pal., vol. ii, p. 117. 



1854. — — /. Morris. Cat. Brit. Foss., ed. 2, p. 224. 



1864. — — F. J. Pidet and G. Campiche. Foss. Terr. 



Crct. Ste. Croix (Mati'r. Pal. 

 Suisse, ser. 4), p. 30. 

 1870. — — F. StoliczJm. Palaeout, ludica, Cret. Fauna S. 



India, vol. iii, p. 99. 



Description. — Shell elongate-oblong, compressed, slightly inequilateral, gaping 

 at the ends, the posterior higher than the anterior part. Dorsal margin 

 almost straight. Ventral margin slightly flexnous, and shghtly oblique to the 

 dorsal margin. Anterior margin rounded. Posterior margin slightly truncate, 

 rounded. Umbones small, inconspicuous, sulj-median. Ornamentation consists of 

 growth-rings, and on the anterior part of the shell, of numerous, very small, rather 

 irregular, radial ribs. 

 Measurements : 



(1) (2) (3) (i) 



Length . 67 . 60-5 . 55 . 44- mm. 



Height .17 . IG . 15 . 12 „ 



(1^-4) Crackers, Atherfield. 

 Affinities. — This species, as was pointed out by Stoliczka, closely reseml)les in 

 foi-ni living examples of the genus Pharus ; but the hinge appears to be miknown, 

 for although the species is well represented in collections, and the specimens are 

 in an excellent state of preservation, none of them sliows the interior of the shell. 

 A single valve resembling P. Warburtoni, but relatively higher, has been described 

 by Dr. Kitchin' from the Uitenhage Series. Dr. Harborf- states that his Solecurtus 

 lungovatas is similar to our species, but is relatively higher and sliorter. 



1 * Ann. S. African Mus,,' vol. vii (1908). p. 155, fij,'. 1. 



= 'Die Fauna d. Sdiaumburg-Lippe'schen Kreidemuldc ' (1905), p. 71, pi. viii, fig. 6. Au 

 imperfect internal cast found in the Upper Greeusand of Devizes shows some i-esemblauce to this 

 species. 



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