TESTACEOUS MOLLUSCA. 69 



^Lacuna picteolus, Turton. 



New to the district : Douglas Bay, among sand (Mai. 

 Mon.) : small living at Bull Bay, and several off Port 

 Erin (F.A.) : one living with L. cUvaricata at Llan- 

 dudno (B.T.). 



Lacujia jxiUidida, DaC. 



Common alive at Moelfre Bay and Forth wen (F.A.), 

 and at Llandudno with the last '2 species (B.T.), 

 where both green and orange forms occur of all sizes. 



*BissocL cancellata, DaC. 



One broken specimen h-om deep water off the Isle of 

 Man, N. coast (Forbes in Jeff. B.C. IV, 10), omitted 

 from Rep. I. 



*Bissoa calathus, F. and H., omitted from Rep. I. 

 Isle of Man (Packe in Jeff. I.e. 11). 



Bissoa punctura, Mont. 



Dredged off Fleetwood (W.H.H.). 



Bissoa costata, Ad. 



Dead in Bull Bay (F.A.), one at Rhyl (B.T.). 



Bissoa joarva, DaC. 



Abundant, living at Porthwen, Llandrillo, Llandulas 

 Point, and Port Erin district (F.A.) : do. at Llan- 

 dudno (B.T.) : Puffin Is. (A. Leicester). 

 Forbes (Mai. Mon.) says that var. interrupta is 

 abundant in Isle of Man, N. but rare at S. and E. 

 where it is replaced by B. cingillus. 



Bissoa striata, Ad. 



Living at Moelfre Bay, Porthwen and Bull Bay (F.A.)' 

 at low water on Puffin Is. (A. Leicester.) : Fleetwood 

 (W.H.H.). 



Bissoa vitrea, Mont. 



One in central area : rare in drift at South port 

 ^G.W.C. and C.H.B.). 



