574 Mr. Gray's Monograph on the Ci/pr(sidce. 



time. The latter, however, is quite smooth at the back, at»d 

 never acquires any striated coat, or even a denticulated edge. 



When I commenced this Monograph, I intended to have sepa- 

 xated this species from the other Cowries, as a distinct genus, 

 under the name of Cyprceovula (Zool. Journal, i. 75) but on 

 further consideration, I have been induced to change the opinion 

 which I had then formed ; for, on considering the very grea^ 

 differences which are found in the teeth of these shells, I must 

 own I am very unwilling to make use of them as the distinguishing 

 character of a genus. Indeed were it not for the peculiarity 

 (which I believe I first pointed out) of the OvuIcb having the 

 young shell always longitudinally grooved, I should be inclined 

 to place them also in the same genus with the Cowries. 



113. Cyprcea daciylosa, — Finger-like Cowry. 



Testa tenui, oblonga, cylindracea, obtus^, longitudinaliteJ" 

 striato-costata ; striis convexis, angustis, numerosis, alternatim mi- 

 noribus, interstitiis Igevibus. ^^ ;i 



Cypraea dactylosa. Lamarck^ Ann. Mus, xvi. n. 13. Hist, Anirn. 

 sans vert, vii. 407. Defrance. Diet, ScL Nat. xliii. 37. / B-M 6 



Cypraea Gervillii. Sow. Genera, 



/3 Georgii. Testa ovata subventricosa. 



Cypraea Georgii. Defrance, I. c. 



Icon. Sow. Gen. Shells, t. Cyprcea^ f. 8. 



Fossil. France. Grignon ? Xam. Mouchy le Chatel? Defrance^ 



— ^ Nehou. Defrance. '-^-^ "$ d-Vii ^^-^f j 



Shell nearly oblong, ovate, white, with numerous longitudinal 

 rib-£triae, which are narrow, convex, and alternately smaller ; 

 they pass over the centre of the back without any interruption, and 

 the spaces between them are quite smooth ; the outer lip is slightly 

 produced and rounded behind, slightly thickened and incurved ; 

 the inner lip slightly thickened and obscurely denticulated, the 

 denticulations on both sides being caused by the ribs. 



Axis 4-I5 diameter J*^ of an inch. 



The variety is shorter, more ventricose, and smaller, not exceed- 

 ing 1 inch in length. M. Defrance now considers it only a variety. 



