224 LIMN^ADiE. 



Velutina otis. Fleming, B. A. 326. — Helix otis. Turton, 

 Conch. Diet. 70. — Galericuluiu otis, and G. ovulura. Brown, 

 III. Conch. — Otina otis. GtYtv, B. Z. Soc. 1848; Clark, 

 Ann. and Mug. N. II. vi. 24.; Forbes and Hanley, B. M. iii. 

 321. t. 99. f. 2, 3. ; Pfeiffer, Moc. Am: 12. 



Rocks on sea-coast. " These animals are genei*ally 

 found at the roots of Lichina pygmcBa on the rocks, 

 often in company with Lasea rubra. When they are 

 placed in water, they generally make their way out 

 and fix themselves to some dry spot, as is the case 

 with many LittorincB, which almost always con- 

 stantly live in free air." — Clark. 



**** Tentacles elongate, linear ; jaio single, angular 

 (fig. 54.) ; body and shell ovate, spiral, 

 sinistral. (Physina.) 



6. Physa. (Bubble Shell.) 



The body spiral, on the middle of an elongate foot ; 

 p- 54 the mantle large, lobed 



on the edge, and ex- 

 panded over the ovate, 

 thin, transparent, spiral, 

 sinistral shell, which has 

 an oblong mouth, with 

 Fhysa fontindis. the inner lip expanded 



and spread over the body whorl, covering it 

 and the smooth pillar ; the tentacles have an 

 auricle at the base. 



The tongue has a multitude of teeth of a simi- 

 lar form, though different from any that I have seen 

 in other genera; but the delicacy of the tongue 



