182 PKELIMINARY EEPOET UPON THE 



striatus (Linn.). Probably in Sound. 



montacuti (Wood). Probably in Sound. 



tumidus (Mont.). In Sound. Coralline zone. 7 — 80 fathoms. 



cinerarius (Linn.). In Sound. Abundant. Sub-littoral. 



umbilicatus (Mont.). In Sound. Abundant. Sub-littoral. 



magus (Linn.). Probably in Sound. 10 — 15 fathoms. 



lineatus (Da Costa). Probably in Sound. Between tide-marks. 

 Cyclostrema (Marr.). Probably in Sound. 10 — 40 fathoms. 



cutlerianum (Clark). Probably in Sound. Found both east and west of Plymouth. 



serpuloides (Mont.). Probably in Sound. 

 Phasianella (Lamk.). 



pulla (Linn.). In Sound and Whitsand Bay. 

 lanthina (Bolt.). 



rotundata (Leach). Whitsand Bay. 



exigua (Lamk.). Cast up in Whitsand Bay during storms. Not British. 

 Crepidula (Lamk.). 



plana (Say). Dredged in the Sound. 

 Truncatella (Risso). 



truncatula (Drap.). Under stones between tide-marks in Sound. 

 Rissoa (Frem.). 



costata (Adams). Whitsand Bay. 



parva (Da Costa). Whitsand Bay. 



fulgida (Adams). Whitsand Bay. 



reticulata (Mont.). On south coast, Devon. 



soluta (Phil.). In Sound. 



cingillus (Mont.). In Sound. 



calathus (F. and II.). Whitsand Bay. 



punctura (Mont.). Whitsand Bay. 



inconspicua (Aid.). Trawl refuse in Plymouth. 



membranacea (Adams). Plentiful on south coast, Devon. 



proxima (Aid.). In sound. 



vitrea (Mont.). Whitsand Bay. 



violacea (Desm.). Probably in Sound. 



striata (Adams). Probably in Sound. 

 Barleeia (Clark). 



rubra (Mont.). Whitsand Bay. 

 Hydrobia. 



ulvae (Penn.). Doubtless in estuaries of Sound. 

 Lacuna (Turt). 



pallidula (Da Costa). On oar-stone. 



divaricata (Fabr.). Probably in Sound. 



puteolus (Turt). Probably in Sound. 

 Skenea (Flem.). 



planorbis (Fabr.). Doubtless in Sound. 

 Littorina (Feruss.). 



litorea (Linn.). In the Sound and its estuaries. 



rudis (Mat.). In the Sound and its estuaries. 



var. tenebrosa. Probably in the Sound. 



var. patula. On Eddystone Rocks. 



obtusata (Linn.). In the Sound and its estuaries. 



neritoides (Linn.). In the Sound and its estuaries. 

 Scalaria (Lamk.). 



communis (Lamk.). In the Sound and Hamoaze. 



clathratula (Adams). On roots of Corallina officinalis. 



trevelyana (Leach), in the Sound. 



turtonae (Turton). Coralline zone. 

 Caecum (Flem.). 



trachea (Mont.). Probably off Sound. Coralline zone. 



glabrum (Mont.). Probably off Sound. Coralline zone. 



