EASTERN PROVINCE — SOUTHERN REGION SPECIES. 345 



Family TESTACELLIDJE. 



OLAIVDINA, ScHUM. 



Shell oblong, fusiform, horn-colored ; whorls 6-8, the last attenuated 

 at base; aperture narrow, fig. 373. 



c'lliptically oblong: peristome 

 simple; columella twisted for- 

 ward at the base and trun- 

 cated ; suture often crenu- 

 lated or margined ; uniform 



in color or ornamented with Glandinatru7icata, one-hidi the natural size. 



longitudinal, usually brownish streaks. 



Animal heliciform, elongated, narrowed anteriorly; eye-peduncles 

 long, having the eye-spots on the posterior face, behind the tips, which 

 are deflected ; tentacles hall the length of the eye-peduncles, bulbous, 

 and somewhat deflected at tip ; on each side of the oral aperture is a 

 retractile, palpiform appendage, attenuated at tip and more or less re- 

 curved, nearly as long as the eye peduncle, the bases separated bya 

 Assure in front ; buccal pouch capable of a proboscidiform protrusion, 

 tlie aperture furnished with three papilhe ^10.374. 



a1)<)ve and three on each side. Genital ori- 

 licc at some distance behind the right eye- 

 l)e(luncle. Anal and respiratory orifices on 

 the right of the mantle, under the peristome 



of the shell. Mantle thin, posterior, COV- Lingual membrane of G. <nmca«a. 



ered b3' a well-developed shell. No distinct locomotive disk. !N^o 

 caudal mucus pore. 



The eggs are 8™™ long, covered with a hard, calcareous shell. 



The subgenera Varicella and Oleacina, s. str., are not found within 

 our limits, but only the 



Subgenus GLAJ^DINA, s. str. 



Shell ovate or ovate-oblong, plicately striate, generally of a silken 

 luster, but never glittering, and usually decussated with delicate revolv- 

 ing lines; suture crenulated : aperture equaling about half the shell's 

 length, its peristome simple. 



