29 



Fam. Sagaretldae. 



XLV. Sigaretus, Cuv* Gray. 

 1. perspicuus. 



Sigaretus perspicuus, Phill. — Sigaretus hali- 

 otoideus, Flem. — Bulla haliotoidea, Mont. 

 — Helix perspicua, Lin. 

 The animal is described by Montagu ; also by 

 Phillippi. 



Very rare. Mr. Wallace found a single speci- 

 men, cast ashore in Douglas harbour, 1837- 



XLVI. Velutina, Flem. 



1. laevigata. 



Velutina laevigata, Flem. — Velutina capu- 



loidea, Blainv. — Helix laevigata, Lin. — 



Helix haliotoidea, Fahr. — Bulla velutina. 



Mull. — Galericulum laevigatum. Brown. 



Animal pinkish white, with two obtuse conical 



tentacula ; the eyes at their external bases. 



Not uncommon in deep water on all the coasts. 



2. Otis. 



Velutina otis, Flem. — Helix otis, Turt. 

 Animal bluish white. 



In crevices of rocks at half tide, with Kellia rubra ; 

 Kirk St. Ann's Head. 



Fam. Naticidae. 



XLVII. Nati«a, Lam. 

 1. monilifera. 



