TUEEITELLA. — SCALARIA. 23 



a seventh above. Length, 20 mm.; when complete, about 22 mm.: width, 

 increased by pressure. 8 mm. The other is an internal cast, with five entire 

 whorls and parts of others. 



The most remarkable character of this species is to be found in the 

 flatly truncate base, making nearly a right angle with the axis of the shell 

 (as in a few recent species), and bearing at its periphery a sharp keel, which 

 on each preceding whorl is covered by the growth of the following volution. 

 The aperture is incomplete, transverse, and narrowly oval (perhaps through 

 pressure), and the columellar lip is turned very abruptly outward from the 

 flat base. Some whorls of the cast show a single delicate raised line half- 

 way between the median keel and the suture below, while midway from the 

 keel to the suture above run two parallel fainter threads. These threads can 

 hardly be distinguished, except with a lens, and on the specimen retaining 

 the test are obscured by the lines of growth, which by their deep curve 

 prove that the lip was strongly insinuate at the middle. The lines of 

 growth are heaviest upon the flat base. Coll. Bird. 



Locality and Position. — Mount of Olives. If Fraas is correct in regarding 

 the fossils on the whole line from Jaffa to the Dead Sea as belonging to the 

 Upper Cretaceous (Turonian and Senonian), this species is probably from 

 that horizon. 



Turritella sp. \ 



Plate II, flgs. 2 a, 1>. 



Fourteen casts incomplete. Coll. Thomson. 



Locality and Position. — Probably Beirut district and from the Turonian 

 Gasteropod zone. 



Scalaria sp.? 



Plate II, <i s s. 3 a. 1>. 



Three internal casts, incomplete and somewhat flattened by pressure. 



Largest, having four whorls, length. 49 mm.; width, increased by flat- 

 tening, 2-"> mm. Fragment having two whorls and pari of a third, length, 

 3 I mm. ; width, flattened, 21 mm. 



Distinct traces of longitudinal ribs upon one of the casts indicate that 

 the specimens belong to Scalaria rather than Turritella. The well-known 

 S. Dupiniana d'Orb., from Campiche's Sainte-Croix collection, in the Museum 



