— 37 — 

 B. punctata, Adams. Rare. 



Genus Bulla, L. 



B. striata, Brug. Very common. A variety striped on 

 both sides is also pleutiful. Specimeus 35 mm. long 

 and 18 mm. broad, bave been taken. 



B. hydatis, L. Maltese name Bait tas-sriedek In sandy 

 bays. 



B. ovulata, Brocc. 



B. truncatula, Brug. Common. 



B. mammillata, Phil. Very rare. In sandy bays . 



B. acuminata, Brug. * Very rare, In sandy bays. 



B. truncata, Adams. Very common. 



VI. Familia APLYSIACEA. 



Genus Aplysia, L. 



A. punctata, Cuv. * 



A. depilans, L. * Maltese name Serduk. Common on 

 seaweeds. 



(Nudibranchiata.) 

 Genus Elysia, Risso. 



E. cyanea, t Nobis. * 



t Minuta, cyanea, tentaculis prcelongis, conico-acumina- 

 tis, divaricatift, erectis. — Rare. Found on seaweeds at 

 Marsascirocco. 



