202 R. Bullen Newton — Miocene Shells from Egy2ot. 



sutured spire, with the centrally nodular plications, as well as 

 the spiral striae, or sulci, ornamenting the surface, serve to 

 distinguish it from S. coronatus, Defrance, a closely related species. 

 S. coronatus is a shorter and much wider shell with a sharp conical 

 spire, consisting of depressed whorls feebly sutured. Fuchs has 

 figured a similar cast from Egypt under the name of Strombus cf. 

 Bonelli, but the present examples exhibit rather more clearly the 

 sculpture of the species. Hoernes and Sacco must be referred 

 to for a longer synonymy of this species than is offered here ; it 

 is important to notice that Sacco has united S. Bonelli of Brongniart, 

 which is an adult form, with the present species. 



Horizon. —Miocene (Helvetian). 



Distribution. — North Italy ; Bordeaux ; Vienna Basin ; Switzer- 

 land, etc. Egypt : Oasis Siwa (Fuchs) ; between Camps 19 and 

 22. Coll. Geol. Surv. Egypt, No. 833, Box No. 3c. 



Genus PTllULA, Lamarck. 



Mem. Soc. Hist. Nat. Paris, 1799, p. 73. 

 Type. — Bulla ficus, Linnseiis. (Syn. Ficula, Swainson.) 



PTEULA CONDITA, Brongniart. (PI. VIII, Figs. 2, 3.) 

 Fyrula condita, Brongniart : Mem. Terr. Calc.-Trapp. Vicentin, 1823, p. 75, pi. vi, 



fig. 4. Sowerby (G. B.) : Quart. Journ. Geol. Soc, vol. iii (1847), p. 415. 



Hoernes, " Foss. Moll. Tert.-Beck. Wien " : Abhandl. k. k. Geol. Eeichs., 



vol. iii (1853), p. 270, pi. xxviii, figs. 4-6. 

 Ficula condita, Sacco : Moll. Terz. Piemonte, etc., 1891, pt. viii, p. 23, pl.i, fig. 27. 



Desobiption, — Testa ficoidea, cancellata ; striis transversis erec- 

 tiusculis ; interstitiis longittidinalihus, frequentibus, decussantibus ; 

 spira hrevissima, plano-retusa, centro miicronata ; apertura oblonga. 

 (Hoernes.) 



The diagnosis of this species, given here, is that taken from 

 Hoernes' work, which, on account of being somewhat fuller, is 

 thought to be of more practical use than the original as drawn 

 up by Brongniart. 



Remarks. — Several casts in the collection evidently belong to 

 this species. They exhibit the smooth arcuate columella, an oblong 

 fusoid aperture, a depressed spire, and an elongate terminal area. 

 The ornamentation, although obscure, is seen to consist of 

 a cancellated structure made up of close longitudinal striations 

 crossed by strong, elevated spiral ridges with finer strigs between 

 each. These specimens have been compared with some beautiful 

 examples of the species in the British Museum from Saucats, 

 S.W. of France, and are found to agree in all essential details. 



The species differs from P. reticulata of Lamarck in possessing 

 a more delicately arched columella and in its finely cancellate 

 sculpture. The specimen numbered 58a appears to be a very 

 old form of this species. 



Dimensions. — Length, 55 mm. ; width, 35 mm. 



Horizon. — Miocene (Helvetian). 



Distribution. — Turin ; S.W. France ; Vienna Basin ; Portugal 

 (Sowerby), etc. Egypt: between Camps 19 and 22 (Ic), aud 



