Mollusca of Great Britain. 343 



Helix umbilicata. Mont. Test. Brit. p. 434. t. 13./. 2. 



Maton ^ Rackett in Linn. Trans. 8. p. 200. Dillw. 



Cat.2. p.9i5. 

 rupestris, 13. Drap. Hist, des Moll. p. 82. t. 7. 



f- 7—9. 

 Very plentiful in the crevices of limestone-rocks near 

 Swansea, Tenby, and other parts of South Wales ; and in 

 the rocks near Bristol. The animal walks with its shell 

 erect, owing to the shortness of its foot. 



27. Pygm^ea. 



Animal nigro-griseum, politum. Tentacula stiperiora fili- 



formia, approximata. Sustentaculum longius. 

 Testa subdepressa, pellucida, subtiliter striata, pallid^ brun- 

 nea. Anfractus 3 — 4, globosi. Apeitura compressa, 

 suborbiculata : perislomio simplici, marginibus dis- 

 junctis. Umbilicus patulus, sinu profundo. 



Long. 0.025.— Diam. 0.06. 

 Helix pygmaea. Drap. Hist, des Moll. p. 114. t. 8. 



/. 8—10. 

 Kirbii. Shepp. in Linn. Trans. 14. p. 162. 



At the roots of rushes in a marshy piece of ground at 

 Marino near Swansea. 



**** Depresses; peristomio incrassato, reflexo. 



28. PULCHELLA. 



Animal croceo-lactescens, pellucidum. Tentacula perbre- 



via ; superior a cylindrica. 

 Testa pellucida, nitida, subtiliter striata, albida. Anfractus 

 3 — 4, subglobosi. Umbilicus patens, sinu profundo. 

 Apertura suborbicularis : peristomio subcontinuo. 

 Long. 0.04. — Diam. 0.1. 

 VOL. XVI. 2 Y Helix 



