172 Lebour : Marine Mollusca of Sandsend , Yorkshire. 



Goniodoris nodosa (Mont.). This is the commonest nudi- 

 branch at Sandsend, under stones between tide-marks, 

 frequently with D. us pern. 



Fam. EOLID^E. 



Eolis papillosa (L.). One specimen on seaweed at spring tide. 

 This species must be common, judging from the quantity of 

 its pretty pink worm-like spawn which is to be seen all over 

 the rocks. 



Fam. CHITON I DM. 



Chiton fascicularis (Li). Common at spring-tides under stones 

 among the rocks. 



Chiton ruber (Lowe). Common at spring-tides and at the roots 

 of Laminaria digitata thrown up on the beach. 



Chiton marginatus (Penn.). Very common all over the rocks 

 and extremely variable. 



Fam. PATELLID^E. 

 Patella vulgata (L.). Very common and in great variety. 

 Var. caerulea. Common. 

 Var. depressa. A few specimens. 



Patina pellucida (L.). Very common on seaweed and rocks. 

 Some specimens growing to an enormous size. 



Var. lasvis. ' Very common. 



Acmsea testudinalis (Miiller). Very common on the rocks at 

 spring-tides in great variety. 



Acmasa virginea (Miiller). Very common in shallow rock pools. 



Fam. CAPULIDiE. 



Capulus hungaricus (L. ). Very young specimens common in 

 shell sand. 



Fam. TROCHID^E. 

 Trochus cinerarius (L.). Very common all over the rocks. 

 Trochus turn id us (Mont.). One worn specimen in shell sand. 

 Trochus heJicinus (Fab.). A few specimens in shell sand. 



Fam. LITTORINID^E. 

 Lacuna divaricata (Fab.). Very common on seaweed. 

 Lacuna pallida la (Da Costa). Common on seaweed. 



Naturalist, 



