92 CLASS III. GASTEROPODA. ORDER VI. PULMOBRANCHIATA. 
last but one is unusually inflated, and the last a little contracted ; the aper- 
ture is circular, with the margins disjoined ; the lip thickened, a little re- 
flected, and generally cut or graved near the columella with a small fun- 
nel-shaped canal or fissure. The Pupine are furnished with a horny, 
orbicular, spiral operculum *. 
Examples. 
Pl. CLXXXI. Fig. 1 and 2. 
Purina vitreA, Sowerby, Jun., Proceedings Zool. Soc., 1841; Thesaurus 
Conchyliorum, pl. iv. f. 6 and 7. 
Pl. CLXXXI. Fig. 3 and 4. 
PupiNna simiuis, Sowerby, Jun., Proceedings Zool. Soc., 1841; Thesaurus 
Conchyliorum, pl. iv. f. 4 and 5. 
Pl. CLXXXI. Fig. 5 and 6. 
Purina Nunezit, Sowerby, Jun., Proceedings Zool. Soc., 1841 ; The- 
saurus Conchyliorum, pl. iv. f. 8 to LI. 
Moulinsia Nunezii, Grateloup. 
Pl. CLXXXI. Fig. 7 and 8. 
Purina Humitis, Jaquenot, Annales des Sciences Naturelles, 1841. Sow- 
erby, Jun., Thesaurus Conchyliorum, pl. iv. f. 2. 
Pl. CLXXXI. Fig. 9 and 10. 
Purina LusBrica, Sowerby, Jun., Proceedings Zool. Soc., 1841. The- 
saurus Conchyliorum, pl. iv. f. 12 to 16. 
Callia lubrica (?), Gray. 
* The genus Pupina, of which so little is at present known, has been judiciously selected 
by Mr. G. B. Sowerby, Jun., for publication in the first Part of his ‘Thesaurus Conchyli- 
orum.’ The object of this work is to give a complete monograph of every genus; and we 
sincerely hope that the author will meet with sufficient encouragement to enable him to fur- 
nish that greatest of all desiderata—a well-illustrated Catalogue of Species. 
