620 ME. E. B. NEWTON ON [Nov. I9U, 



Helicella tebeecueosa (Conrad). (PL XLIII, figs. 3-5.) 



Caracolla tubermlosa Conrad, in W. F. Lyncli's ' Official Report of the U.S. 



Exped. Dead Sea,&c,' 1852, pi. xxii, fig. 132 & p. 229. 

 Helix tuberculosa von Martens, Sitz-Ber. Gesellsch. Naturf. Freunde Berlin 



(' Landschnecken & Reptilien aus der Cyrenaika ') 1883, p. 147. 

 Helicella (Turricula) tuberculosa Try on, ' Manual of Conchology ' 1888, ser. 2, 



vol. iv, p. 25. 



Remarks. — This species, which assumes roughly the character- 

 istics of a Trochus, as indicated in the original description, is repre- 

 sented by beautifully preserved specimens of variable dimensions : 

 the smallest having a length and basal width of 3 millimetres in 

 both directions, the largest measuring 15 mm. in length and the same 

 in width, which is an unusual size for the species. The shell was 

 originally described from the Dead Sea region ; von Martens has 

 recorded it from Benghazi, in Cyrenaica, and Bourguignat from 

 Southern Syria, near Jerusalem, and probably from Arabia Petraea. 1 



Occurrence. — In a reddish-brown sandy-looking soil. 



Locality. — Plain east of Benghazi. 



The Marine post-Pliocene (Recent Beds) Mollusca from the 

 Beach-Deposits of Benghazi. 



Gastropoda. 



Ceeithium cf. vulgatem Bruguiere. 



CeritJiium vulqatum BruguuTe, Encycl. Meth. (Vers) 1792, vol. i, pt. 2, p. 481 ; 

 Sacco, ' Moll. Terr. Terz. Pieraonte' 1895, pt. 17, pi. i, figs. 15-34 & pp. 6-11 

 (and varieties) ; P. Bede, Feuille des Jennes Naturalistes, 1904, No. 408, p. 4. 



Remarks. — Consists of a fragmentary worn specimen. Prof. 

 Sacco regards certain varietal forms as ranging through the 

 Miocene (Helvetian) and Pliocene rocks ; while M. Paul Bede has 

 recognized the species in the more ancient Quaternary deposits 

 of Tunisia (Sfax), and the mollusc thrives at the present day in 

 southern European seas. 



Colembeela eestica (Linnaeus). 



Voluta rustica Linnzeus, ' Systema Naturae ' 1758, ed. 10, p. 731. 



Colombella rustica Lamarck, ' Hist. Nat. Anim. sans Vert.' 1822, vol. vii, p. 293 ; 

 Tryon, 'Manual of Conchology' 1883, vol. v, pi. xliii, figs. 34-49 & pi. xliv, 

 figs. 50-56, p. 107 ; P. Bede, Feuille des Jeunes Naturalistes, 1904, No. 408, 

 p. 2. 



Remarks. — An imperfect worn example referable to this 

 species is in the collection. The shell does not appear to have been 

 recognized by Prof. Sacco in the Italian Pliocene, but M. Paul Bede 

 records it from the more recent Quaternary beds of Tunisia (Sfax), 

 and the form is well known as living in the Mediterranean and 

 Atlantic. 



i ' Moll. Nouv. Litigieux ou Peu Connus ' 1863, pt. 1, pp. 60-63. 



