18 SYRIAX MOLLUSCAN FOSSILS. 



spire, and seems therefore more appropriately to bear that generic name. 

 Coll. Bird. 



Locality and Portion. — Abeih; from the arenaceous portion of the Turo- 

 nian marl. 



TYLOSTOMA Sharpe. 



This genus, instituted by Sharpe in 1849 (Quart. Journ. Geol. Soc. Lond., 

 V, p, 376), is identical with Varigera, designated by d'Orbigny in 1850 

 (Prodr. de Paleont., II, p. 103). It is characteristic of the Cretaceous system 

 in Portugal, from which Sharpe described four species. Pictet and Campiche 

 have since named eight from the Cretaceous beds of Sainte-Croix. Switzer- 

 land, and still later (1807) Stoliczka has recorded three species from the 

 Cretaceous of Southern India ; but the genus has not been recognized 

 hitherto among the fossils of Syria. It is assigned to the family Naticidce. 



Tylostoma Birdanum, sp. nov. 



Plate I, fls. 4. 



Testa ovato-etongata, subturrita ; spira elata, conica, acuminata: anfractus septem 

 convezi, vix gradati, striis increnienti crassioribus insigniti, varicibus extends prope 

 coirtinuis in ordines duos fere oppositos redactis muniti ; uMmus longitudinem spirce 

 paido superans et latior quam longior; sutura profunda: apertura ovato-lunata, antice 

 rolundata, postice (uit/itl<> acuio terminans ; columella rimulata. 



Shell ovate-elongate, subturreted ; spire elevated, conical, acuminate: 

 whorls seven, convex, very slightly tabulated at the posterior margin, 

 marked with rather heavy lines of growth, and bearing two rows of nearly 

 continuous varices, distant from each other about half a volution ; last whorl 

 but little longer than the spire and wider than long; suture deep: aperture 

 ovate-lunate, rounded in front and terminating behind in an acute angle; 

 columella slightly fissured. 



The species is described from a single specimen of the following dimen- 

 sions: length in present condition, 38 mm. : original length, approximate, 

 ID nun. : length of hody-w liorl restored. 21mm.; its width. 27 mm.; length 

 of spire measured from body-whorl, ID mm. 



The specimen here described is one of very few of its genus which have 

 been found retaining the test. The only parts wanting are a small trian- 



