STUBBS : LAND AND FRESHWATER SHELLS OF TENBY. 327 



8. — Caldy Island. Fairly common on the south side of the island. 



Shells like the last. 

 9. — Odd specimens of H. ptsana have also turned up at Saunders- 

 foot, Penally, and on the North cliff, but these have obviously 

 been imported. 

 Var. tenuis. — The Rev. J. W. Horsley and myself have each 

 taken a single specimen of this peculiar form. 



Var. minor. — Common on the Burrows near high-water mark, 

 and in the Jubilee Gardens down by the Burrows. 



Var. lineolata. — Common with type in most places. 

 Var. albida. — Abundant. Pink-lipped specimens are not so 

 common. 



Var. alba. — Rare. South Cliff beneath the Esplanade, Jubilee 

 Gardens, and railway bank below the Wreck Field. The banded 

 form (var. hyalozonatd) is the one usually met with. 



Monstrosities. — I have taken three fine scalariform specimens. 

 Besides the above-named varieties the following modifications of 

 the shell are worthy of notice : — 

 1. — Shells having the spire plain white, but the usual banding, or 



rows of dotted bands, on the body-whorl. Common. 

 2. — Shells plain white, with the exception of a single dotted band 



round the periphery. Common. 

 3. — Shells with arrow and feather-like markings in place of the usual 



banding on and above the periphery. Not uncommon. 

 4. — Shells much depressed above and below. Common. 

 5. — Shells very globose, last whorl much larger in proportion to the 



others. Marsh Road, not common. 

 6. — Shells larger and thinner with an inflated mouth, not uncommon 



by the Wreck Field. 

 7. — Shells smaller and exceedingly thin and light, the animal showing 

 very plainly through the shell. Sea-cliff near Lydstep. 

 H. itala. — Abundant on the Burrows, the railway banks, round 

 Hollo way Quarry, and at Giltar; also a few colonies further inland. 

 It is most plentiful on the Burrows between the Black Rock and 

 Giltar. In winter time living, but much weathered specimens, may be 

 be seen clinging to the long grass, and withered stalks of the Ragwort. 

 The varieties are generally found in colonies except var. albida (=var. 

 alba Charp.) which is always found with the type wherever the latter 

 occurs. Shells taken from the 'Burrow Rose' have often a reddish or 

 pinkish tinge which, however, fades very much after the animal has 

 been extracted. The largest come from the top of the cliffs between 

 Proud Giltar and Lydstep. Two specimens with a double band above 

 the periphery have been taken on the Burrows. Slightly twisted 

 specimens are not uncommon. 



