WARREN : MARINli MOLLUSCA OF KILLALA BAY, IRELAND. I07 



Scaphander lignarius (L.). Young shells only after a storm. 

 Philine scabra (Miill). Very fine specimens, Bartra and 



Enniscrone. 

 P. scabra var. circa Marshall. Bartra Island. This has 



already been recorded in the 'Journal' for January, 1889. 

 P. catena (Mont.). Occasionally, Bartra and Enniscrone. Also 



the var. zona Jeff. 

 P. angulata Jeff. One specimen, imperfect, was detected in 



shell-sand from Enniscrone by Mr. Marshall. 

 P. punctata (Clark). Occasionally at Bartra. In 1887 I got 



some particularly good drift on Bartra Island, and in some 



I sent to Mr. Marshall he discovered the var. cingidata of 



this species, analogous to his var. circa of P. scabra. 

 P. nitida Jeff. Mr. Marshall detected some specimens from 



Enniscrone and Bartra. 

 P. aperta (L.). Common, Bartra and Enniscrone. 

 Aplysia punctata Cuv. 

 Melampus myosotis (Drap.). In several parts of the estuary 



w^here fresh_water oozes over the muddy and grassy spots. 



The var. ringens lives with the type. 

 Otina Otis (Turt.). Two specimens in shell-sand, Enniscrone. 

 Spirialis retroversus (Flem.). In shell-sand, Bartra. On 



one occasion, some years ago, these minute shells were 



washed ashore literally in millions, appearing like masses 



of froth. 



It may be a matter of surprise to many readers to find so 

 few /^/;;^cY specimens recorded of those shells cast up on the 

 beach, but their surprise would cease did they see the numbers 

 of large powerful-billed birds — such as the great black-backed 

 and herring gulls — always watching the receding tide ready to 

 seize on all that may be washed up. 



Sep te /liber 22, 1892. 



