309 

 NOTES ON THE NON-MARINE MOLLUSCA OF MORTEHOE. 



No. 3. 

 By M. jane LONGSTAFF, F.L.S. 



(Read before the Society, January loth, 1912). 



.The forms now added to the list of moUusca found in Mortehoe 

 Parish here recorded were observed by myself during the summers 

 of 19 10 and 191 1, and by Mr. Hugh Watson in 1903 and 19 10. 

 The identification of all has been confirmed by Mr. F. Taylor, Mr. 

 J. W. Taylor, or Mr. W. Denison Roebuck. The number of species 

 previously noted was fifty-two, of varieties forty. This is now increased 

 to fifty-eight species, and sixty-six varieties. One of the most note- 

 worthy finds is that of Vitrea rogersi Woodward at Braunton, just 

 outside the limits of the parish as previously defined. Mr. Hugh 

 Watson sent a large series of Helicella virgata DaCosta which he had 

 collected at Woolacombe to Mr. W. D. Roebuck who observed that 

 he had never seen a set "that so nearly approached the Tenby forms." 



*Vitrina pellucida Miill. var. depressiuscula Jeff. — Woola- 

 combe, Not uncommon in 1903 (H.W.). 



*[Vitrea rogersi Woodward. Braunton. Four specimens taken 

 on a wall by a stream in Sept., 19 10. This species does not appear 

 to have been previously recorded from North Devon. It has been 

 confirmed by Mr. B. B. Woodward, Mr. Kennard, and Mr. F. Taylor]. 



Vitrea radiatula Alder. — Church Close, four specimens. Near 

 Bennett's Mouth, one. 



*Vitrea nitidula Drap. var. subnitens Bourg. — Woolacombe 

 in 1910 (H.W.). 



*Zonitoides nitidus Miill.— Near Bennett's Mouth. Two ex- 

 amples were found by my niece, Miss Constance Turpin, in May, 

 191 1, on marshy ground. Though previously taken at Braunton 

 and Croyde, its occurrence in this parish has not been noted before. 



*Arion ater L. var. succinea Miill— Near Bennett's Mouth. 

 A single specimen. 



*sub-var. plumbeo-pallescens Roeb. — Twitchen. One speci- 

 men found under a stone in the garden. It was very pale grey, 

 almost white, with a yellow fringe. Confirmed by Mr. W. D. Roebuck. 



*Pyramidula rotundata Miill. var. alba Moq. — Woolacombe 

 Down. Only three specimens were met with, under mossy stones in 

 a Pickwell sandstone quarry. They were in company with the typical 

 form, which was much more numerous. 



