SMITH : NOTE ON BURSA (tUTUFA) RUBETA. 23 1 



of the same species. However, in the large series I have examined, 

 the connecting links appear to be present. 



Var. 4. tenuigranosa Smith (fig. 6). 



The last, or fourth variety, might perhaps be regarded as a finely 

 sculptured form of var. 3. The aperture, columellar callus, and 

 labrum are entirely white, the columella is finely Urate above and more 

 strongly anteriorly. Not one of the three specimens at hand is adult, 

 and the character of the labrum is Uke that of the young shell of var. 

 3 described above. The peculiarity of this fourth variety is the much 

 finer granulation of the surface. The largest specimen is 193 mm. 

 in length. 



Hab.— ? 



Explanation of Plate IV. 

 Fig. I. Bursa {Tutufa) rubeta (Bolten), Typical. 

 Fig. 2. Bursa {Tutufa^ rubeta with undeveloped labrum ^cal- 



edonerisis, Jousseaume. 

 Fig. 3. Bursa (^Tutufa) rubeta var. lissostoma Smith. 

 Fig. 4. Bursa {Tutufa) rubeta var. gigantea Smith. Specimen in 



the Cuming Collection. 

 Fig. 5. Bursa (^Tutufa) rubeta V2a. gigantea Smith. Specimen from 



Muscat. 

 Fig. 6. Bursa (^Tutufa) rubeta var. tenuigranosa Smith. 

 All figures about one fourth the length of the specimens. 



Caecilioides acicula, Vallonia excentrica, etc., in Denbighshire.— At the 



latter end of September, 1913, I visited the famous Cefn Caves, in the Elwy 

 Valley, Denbighshire, along with Mr. R. Standen and others, and in the space of 

 half-an-hour we made a rapid survey of the ground round about in search of shells 

 and woodlice. Finding our time so limited, we gave up the search for living 

 examples, and devoted the last five minutes or so to filling a small calico bag with 

 the loose soil and shell-debris hanging on the narrow rock ledges about the caves. 

 On working through the material at home we were surprised with the result. The 

 following comprises the full list of shells obtained in this way, the majority, of 

 course, being dead examples, but quite recent in appearance :- — Agriolitiiax agi-estis 

 (two shields) ; Vitrina felliicida ; Vitrea crystallina, V. cellaria (and var. albino), 



V. rogersi, V. nitidula, V. radiaiula ; Arion ater (granules) ; Punctum pygmceum ; 

 Pyraviidula riipestris, P. rotiindata ; Helicella caperata ; Hygroniia hispida ; Acan- 

 thiiiida aciileata ; Vallonia costata, V. excentrica ; Helix aspersa, H. nenioi alis ; 

 Cochlicopa lubrica ; Ccecilioides acicula ; Jaininia cylindracea (and var. ctirta) ; 



Vertigo pygDUTa, V. siibstriata ; and Claiisilia bideniaia. Mr. Charles Oldham 

 visited these caves in i8g6, and oljtained quite a number of shells in an hour's col- 

 lecting. Some twelve of the shells in his list {J. of Condi., viii., p. 251) are 

 additional to ours, while some sixteen of ours are additions to those he found. We 

 quite agree with him that this beautiful valley would repay systematic work, but 

 one must not be handicapped with having to catch conveyances back home. — 

 J. Wilfrid Jackson {Read before the Society, Feb. 11, 1914). 



