Sir R. Schomburgk on some new Fossil Shells. 347 



Cyclostomata from the same quarter have opercula wound on a 

 plane, as in a new species found by Dr. Jerdon in the Nilgherries, 

 or beautifully ornamented and projecting beyond the peristome, 

 as in C. cornu-venatorium. Of the last -named shell I lately took 

 alive, near Point de Galle in Ceylon, specimens of a singular 

 variety with a free deflected aperture analogous to that of Cylin- 

 drella. 



XXXVIII. — Description of some new Fossil Shells from Bissex 

 Hill and Springfield in Barbados. Communicated by Sir 

 Robert H. Schomburgk, Ph.D., Member of the Imperial 

 Academy Nat. Curios. &c.* 



Fam. SCALARIANA, Lam, 

 ScALARiA Ehrenbergi, E. Forbes. (Fig. 1.) 

 *' S. testa brevi, obesa, ventricosa, anfractibus 5, longitudinaliter 

 costulata, costis regularibus aequalibus, lamelliformibus, in ultimo 

 anfractu 1 6 ; apertura rotundata, marginata. 

 "Shell ventricose and shortly conical, whorls'about 5, rounded, 

 longitudinally ribbed ; the ribs equal, elevated^and not thick, nu- 

 merous, 16 on the body whorls : no spiral ridge on the base : 



2 



Fig. 1 . Scalaria Ehrenbergi. 

 Fig. 2. Nucula Packeri. Fig. 4. Nucula Schomburgkii. 



Fig. 3. The same, showing the dorsal margin. Fig. 5. The same, showing the dorsal margin. 



marginal rib of the round aperture strong and high ; columella 

 broad and rather angulated at the base. Length -^-^ of an inch : 

 breadth -^^ of an inch. 



" This remarkable species is allied to some tertiary forms, pro- 

 bably miocene. Among recent species its nearest ally is the 

 Scalaria crassilabrum of Sowerby, jun., a species from the Phi- 

 lippines and Central America.^' 



* The descri])lion of these interesting fossils is originally printed in my 

 'History of Barbados' (London, 1848, Longman, Brown and Co.) ; but as 

 such a work possesses only local interest, and its circulation is consequently 

 limited, it is not probable that naturalists in general would become acquainted 

 with their description if it were restricted to the pages of that work. I have 

 therefore requested the Editors to insert the account of these fossil shells in 

 the ' Annals of Natural Historv.'— R. H. S. 



