MOLLUSOA OP PLYJIOUTR. 401 



Yoalm in August of this year, and were brought back alive to the 

 Laboratory. About twelve more specimens were obtained there on 

 another occasion in September. Empty shells may often be found 

 on the shores of the Yealm ; probably, therefore, the species fre- 

 quents this estuary. 



Clark states, in his History of the British Marine Testaceous 

 Mollusca, 1855, " Twenty years ago I observed hundreds of these 

 creatures swimming [by means of their pedal flaps] and creeping on 

 the fine mud in the lakes of the Mount Pleasant Warren, near 

 Exmouth ; they, however, suddenly disappeared from the locality, and 

 not one has been seen for many years. '^ 



Cocks, in 184-9, recorded the species as common in Falmouth 

 Harbour. 



Family— V^KllimiDM. 



3. Philine, AscaniiLs. 



3. Philine aperta, Linnseits. 



This species is common on sandy bottoms, in Cawsand Bay and 

 especially in Whitsand Bay. The animal is said to be able to swim, 

 but I have not myself seen it progress in this way. 



4. Philine punctata, Clark. 



I have only seen one specimen of this small species, found among 

 some BowerhanJda dredged in the Sound. Clark recorded it as 

 inhabiting the littoral zone at Exmouth along with P. catena, which 

 was " rare amongst algae in the sheltered pools. '^ Cocks found it 

 among shell sand at Falmouth, rare. 



B. ANASPIDEA. 

 Family— AVliY^llJyM. 



4. Aplysia, Linnseus. 

 5. Aplysia punctata, Cuvier. 



Apltsia punctata, Cuvier. Blochmann, Mittheil. Zool. Stat. Neapel, v, ISSi, 



pp. 28—49. 



— — Cuvier. Vaj'ssi^re, Ann. Mus. Hist. Nat. Marseille, 1885, 



Mem. No. 3, pp. 68—71. 



— — Cuvier. Gwyn Jeffreys, British Conchology, v. 



