JOURNAL OF CONCHOLOGY, VOL. 9, NO. 12, OCTOBER, I9OO. 365 



The following papers, previously published in this Journal, may be 

 referred to : — 



1. — J. W. Cundall: "List of Shells taken at Tenby," vol. 6, p. 102. 



2. — A. G. Stubbs: "Observations on Abnormal Specimens of Plan- 

 orbis spirorbis and other Freshwater shells at Tenby," vol. 9, p. 106, 

 1898. 



3. — "Observations on Limntza peregra" vol. 9, p. 112, 



1898. 



4. — R. Standen : "Remarks on the cause of Abnormality in Plan- 

 orbis spirorbis" vol. 9, p. 216. 



Balea perversa. — Colonies on walls in several places. Two 

 forms are found : one short and stumpy, the other long and slender. 

 North Cliff, Heywood Lane, etc. — {Note added Aug. 19, 1900). 



Note on Tapes pullastra Montagu. — Some doubt having been suggested as to 

 whether this shell ought not to be called T. geographicus (Gmelin), the following obser- 

 vations may be of interest. Jeffreys (Brit. Conch., vol. 2, p. 357) records his opinion 

 that Venus geographica is a variety of Tapes pullastra, and since the former name 

 was given by Gmelin before the latter was proposed by Montagu, the step might at 

 first sight seem necessary. The fact is, however, that Jeffreys was in error ; indeed 

 it would seem as though he had not actually looked up the authorities to whom he 

 refers. The two shells are quite distinct, and Montagu's name must stand for the 

 British species. 



Gmelin (Linn., Syst. Nat., ed. 13, p. 3293) created his Venus geographica with 

 the following references : — Gualt. Test., t. 86, f. H. ; Chem. Conch., 7, t. 42, 

 f. 440. The former figure is very indecisive, but the latter is unmistakably Tapes 

 geographicus, the well-known Mediterranean species. 



Montagu (Test. Brit. I., p. 125) gives for his V. pullastra these references : — 

 Chem. Conch., vii., t. 42, f. 439 ; Linn. Trans., vi. , t. 17, f. 13, 14 {Wood). The 

 two Chemnitzian figures referred to by these several authors are as different as 

 possible. It is true that Chemnitz refers his fig. 439 (erroneously) to Venus 

 litterata, but Montagu expressly states that it " is exactly the shape of" his, whilst 

 he also points out (as is indicated by his second reference) that Wood was the 

 first to separate T. pullastra from T. decussata, with which it had previously been 

 confused, though he did not give it a name. 



Both T. pullastra and T. geographicus occur in the Mediterranean — a fact of 

 which Jeffreys, evidently from the wording of his remarks, was unaware. Both are 

 cited by Locard, and placed in widely different groups. Romer did not admit 

 Jeffreys' dictum of their identity. — B. B. Woodward {Read before the Society, 

 September 12, 1900). 



