53 



caput connexa. Cucullus latus, corpus testamque antice 

 tegens, margine antico pedi connexus, dum animal pascit 

 detrahendus. Pallium tenue, continuum, latera testac pro- 

 tegens. Operculum comeum, simplex, spira antico-interna, 

 cicatrice parvula. Musculus opcrcularis lateralis, contraclus. 

 Musculus adhaesionis ventralis, latus, cartilagineus, candi- 

 dus. Pes valde contractilis et mutabilis, latus, magnus, 

 subdiaphanus, antice cucullum recipiens. Solea simplex, 

 marginibus tenuibus. Anus pallio absconditus, sinister? 

 Branchiae subdorsales. 



Transactions of thc Linncan soc. nr. V. p. 30. 



a. Naticina lactea Lansdowu Guilding. 



(posthum.) 



N. testa ovali, ventricosa, lactea, nitida; spira promi- 

 nula; anfi-actibus septem, epidermide fuscescenti-ferruginea 

 tectis, apicalibus nudis minutis. 



Axis l/g- unc, diam. \l unc. 



Similis naticae mamillae Lam. ct naticae mamillari Lam. 

 — Animal totum ilavescenti-lactcum, capile rufesceute, ab- 

 domine nigrcscenti-ilavido, operculo castaneo, margine dia- 

 phano. 



Nerita ■ mamilla var. C Dillvvyn cat. IL p. 985. — 

 Lister conch. tab. 571. fig. 22? 



Hab. frequens in profundis Oceaui Caribaei, nec cum 

 neritis littora peteus. 



Transaclions of the Liuneaii soc. nr. V. p. 31. 



!£3, ROTELLA Lani. (Globulus Schum.; pitouilliib 

 Montf.) 



j. Kotella gigaiitea II. P. Lesson. 



R. testa orbiculari, convexo-conoidca, leviter rugoso- 

 slriata, grisea, maculis parvis aut lincaribus albis ucc nou 

 brunncis nolala, facie infima grisca; callo albo. 



Alt. 10 lin., diam. trausvers. 17 liu.; apcrturuc long. 

 9 liu. 



