73 
Cyclosloma lucidum Lowe Primit. p. 66. n. 71. t. 6. fig. 40. 
— — Pfeiffer in Chemn. II. Cyclost. p. 110. n. 111. 1. 13. fig. 26 — 27. 
— lucida Lamarek edit. Deshayes VIII. p. 369. n. 36. 
Craspedopoma lucidum Pfeiffer Monogr. pneumonopom. p. 51. n. 1. 
— — Cray Nomenclat. of Cyclophor. p. 13. n. 1. 
Habitat in Maderae locis humidis, sub foliis putridis, v. c. in Ribeiro frio, haud rarum. 
2. Cyclostoraa Lyonnetiannra Lowe. 
Tab. 16. Fig. 32—34. 
Testa rimata, subcompresse -pyramidata, solidiuscula, striatula, nitida, olivaceo- 
badia; spira conica; anfractus 5 convexi, ultimus antice ascendens, subsolutus, ad peri- 
pheriam subcarinatus ; apertura subverticalis, circularis, peristoma simplex, obtusum. 
Diam. maj. 3y, min. 3, ait. 4 millim. 
, Cyclosloma Lyonnetianum Lowe Synops. p. 15. n. 70. 
Craspedopoma — Pfeiffer Monogr. pneumonopom. p. 52. n. 2. 
— — Cray Nomenclat. of cycloph. p. 13. n. 2. 
Habitat in Maderae convallibus umbrosis, humidis; in Ribeiro frio ad rupes de- 
clives atque aditu difficillimas. Rarissimum. 
LIMNAEACEA. 
Testa multiformis, tenuis, margine peristomatis acuto; operculum nullum. 
Genus. 
Limnaeus. 
Testa rimata, ovata vel turrita, spira apice acuta; apertura longitudinalis; peristoma 
rectum, marginibus callo tenui junctis; dextro ad insertionem inflexo. 
Limnaeus truncatulus Muli. 
Tab. 16. Fig. 35 — 36. 
Testa rimata, ovato -oblonga, striatula, pallide cornea; sutura profunda; anfractus 
3 convexi, ultimus ventroso- ampliatus; apertura acute ovata; peristoma tenue rectum, 
margine columellari reflexo, patente. 
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