71 
t. Clausilia exigua Lowe. 
/ Tab. 16. Fig. 20 — 22. 
Testa cylindraceo- fusiformis, tenuis, oblique confertim costulata, pellucida, fusco- 
cornea; spira turrita, apice acutiuscula; anfractus 8 planulati, ultimus basi obsolete crista- 
tus; apertura pyriformis, lamella supera prominens, infera brevior, profunda, plicae pala- 
tales 2, supera saepe obsoleta, subcolumellaris vix emersa; peristoma continuum, solutum, 
callo albo cinctum. 
Long. 7, diam. 2 millim., apert. millim. longa, \ lata. 
Clausilia exigua Lowe Primit. p. 66. n. 70. t. 6. flg. 39. 
— — Pfei/fer Monogr. III. p. 592. n. 47. 
— — de Charpentier in Petit Journ. d. Conch. 1852. p. 369. n. 57. 
Habitat in Maderae cultis, sub lapidibus, ad muros castelli Funchalensis, haud rara. 
3. Clausilia deltostoma Lowe. 
Tab. 16. Fig. 23—25. 
Testa fusiformis, solidula, confertim oblique costulata, badia, spira subulata, apice 
acutiuscula; anfractus 11 convexi, ultimus basi rotundato -cristatus; apertura ovato-pyri- 
formis, lamella supera mediocris, prominens, infera profunda, obliqua, plicae palatales 2 
profundae, supera saepe obsoleta, subcolumellaris inconspicua; peristoma continuum, so- 
lutura, albo -callosum, undique expansiusculum, ad lamellam superam canaliculatum. 
Long. 12, diam. 3 millim., apert. 2| millim. longa, 1f lata. 
Clausilia deltostoma Lowe Primit. p. 65. n. 69. t. 6. fig. 37 — 38. 
— — Pfeiffer Monogr. II. p. 410. n. 34. 
— — Lamarck edit. Deshayes VIII. p. 211. n. 32. 
— — Kiister in Chemn. II. Glans, p. 92. n. 87. t. 10. fig. 21 — 24. 
— — de Charpentier in Petit Journ. d. Conch. 1852. p. 370. n. 58. 
Var. ji. testa pallidiore, graciliore, subsubiliformi, anfractibus convexiusculis. 
Long. 12, diam. 2^ millim. Lowe 1. c. fig. 38. 
Habitat in Maderae cultis, sub lapidibus, ad muros, ubique frequens; var. in 
locis umbrosis, ad muros oppidi Funchal prope mare, nec non in Ribeira frio ad rupes 
reperitur. 
4. Clausilia Lowei Alhers. 
Tab. 16. Fig. 26 — 28. 
Testa subulato- fusiformis, tenuiuscula, lutescenti -pellucida, crasse et spatiose co- 
stata; spira gracilis, apice acuta; anfractus 11 convexi, ultimus basi bicristatus; apertura 
rotunda, lamellae validae, supera prominens, lunella nulla, plicae palatales 3, superae 2 
