36 SYEIAN MOLLTJSCAN FOSSILS. 



On applying to Conrad's figure a recent Meh JEthiopica of corresponding size, 

 such coincidence of outlines appears as convinces the observer that the two 

 are generically equivalent. 



Fossil species of Meh are rare, but are found in the Cretaceous and 

 Tertiary formations. Stoliczka describes a single species, M. pyriformis 

 (Cretaceous Gastropoda of Southern India, p. 83, PI. vi, fig. 9) from India. 



Lartet (Expl. Geol. de la Mer Morte, p. 115), under the heading Strombus 

 pervetus, speaks as follows: "Nous avons trouve an waddy Ileidan un moule 

 de Casteropode qui se rapproche de cette forme et ressemble ainsi au Ptero- 

 cera inornata." Our specimen and that figured by Conrad, on comparison, 

 will be found very unlike P. inornata d'Orb. (Paleont. Fran.;., Terr. Cret., II, 

 Fl. ccxiv). Coll. Merrill. 



Locality and Position. — Beirut district ; from a yellow marl, probably 

 Turonian. 



Cerithiimi gracilens, sp. nov. 



Testa ehngata, turrita, spires angulus 14°— 16°, suturce 87°: anfractus rnulii, 

 complanati, paulum ezcavati, sutura profunda sejuncti, terms seriebus tubercuhrum 

 ornati tubercuUs in serie mediana ceteris mutto minoribus : basis anfractus 

 uUimi subconvexa, moderate producta, spirdliter serie una tuberculata : aper- 

 tara quadrangularis, antice cdnali angusto terminans. 



An elongated turreted shell composed of numerous flattened volu- 

 tions, which increase very gradually in length and width. Each of 

 the whorls is ornamented with two rows of rounded and close-set 

 tubercles, adjacent to the suture, which are so prominent as to give 

 to the volutions the appearance of being somewhat excavated. Midway 

 between these rows is a third, made up of much smaller tubercles, less prom- 

 inent and distinct. 



Nineteen specimens, none entire, but the greater number retaining the 



test. 



It may have been such specimens as these, found at Abeih. which Fraas 

 considered to he V. trimomle Michelin* (Aus dem Orient. 11. Theil. p. 70). 

 Thai species is very extensively distributed, for besides being known in the 

 Gaull of France, it has been recognized by Stoliczka in Southern India. On 

 comparison with Michelin's, d'Orbinny's, and Stoliczka's figures of G. trimomle, 



* Mom. Sue. Geol., Ill, p. 100, PI. xii, 6g. 5, 1S38. 



