CORRIGENDA. 631 



Nr. 313 adde: Rceve N. 688. t. 118. Nr. 330 adde: Reeve N. 917. t. 143. 

 - 314 - Reeve N. 666. t. 116? - 332 - Reeve N. 352. t. 67. 



350 '^. H. ambigua Adams. •{• 



T. vix uinbilicala, depresso-orbicularis, cornea; spira con- 

 vexa; sutura impressa; anfr. 6 convexi, ultiinus rolundatus; 

 apertura lunaris; perist. tenue, acutum. (Rv.) — A single in- 

 dividual occurs, which is like H. similis, but smaller; with 

 the spire niore eievated, Ihe columella less obhque, and the 

 anterior part of the lip directly transverse, with a smaller um- 

 bilicus. The suture is deeper than in H. similis or in H. ar- 

 boreoides , between which Ihis shell is in ntost characters in- 

 termediale. Grealest breadth 0,46, least breadth 0,42, height 

 0,25 inch. (Ad.) 



Helix ambigua Adams Contrib. to Conch. N. 3. p. 35. 

 — — Reeve Conch. lc. N. 32 0. t 63. 



Habitat in insula Jamaica. 



Nr. 357 adde: Reeve N. 882. t. 139. Nr. 360 adde: Reeve N. 600. t. 107. 



365 ^ H. placentula (Zonites) Shuttleworth. •{- 



T. aperte umbilicata, depressissima, arctispira, nitidissima, 

 striis distantibus irregularibus impressis notata, cornea, dia- 

 phana, subtus concoior; anfr. 7 lentissime accrescentes , vix 

 convexiuscuh , ultimus subtus convexus, ad umbilicum subex- 

 cavatus; apertura obliqua, lunaris; perist. simplex , acutum. 

 — Diam. maj. 7 7^5 v(\\v\. 6^^, alt. Sy^ mill. (Sh. ) 



Zonites Placentida Shuttleworth in Bein. Mittlieil. 1852. Aug. 

 p. 194. 

 Habitat in Tennessee Americae septentrionalis (Rugel). 



Nr. 367 adde: Reeve N. 733. t. 122. Nr. 373 adde: Reeve N. 332. t. 65. 



- 369 - Reeve N. 337. t. 65. - 374 - Reeve N. 350. t. 67. 



N. 64 4. t. 112 et H. - 375 lege : H. brevior Ad. Confr 



selenina ReeveN.7i6. N. 9. p. 185. — 



t. 121. Reeve N. 388. t. 66. 



- 372 - Reeve N. 325. t. 64. 



