SMITH : PENNANT COLLECTION OF BRITISH SHELLS. 



39 



12 



13 



14 



16 



17 

 18 



Veinis undata 

 Tellina crassa 

 Soldi pelliicidus 

 Mytilns pellucldus 

 Mytihis iimbilicatus 

 Pecteii subrufus 

 Peden obsohtiis 



Luchiopsis ttndata (Pennant). 

 Tellina crassa Pennant. 

 Cultelhis pellucidtis (Pennant). 

 Mytihis edulis l^inn., var. 

 Modiolus 7//odioljiS (Linn.), monstr. 

 P. {/£qiiipecte7i) opercularis (Linn.). 

 P. {PalliolufH) tigriuus (Miill.). 



It will be noticed that only six in the above list can be retained as 

 valid species, the remaining twelve becoming mere synonyms of 

 species previously described by Linn?eus and Miiller. One of them 

 (Turbo tuberculatus) is not a British species, but belongs to a common 

 West African form. The most interesting shell is the type of Helix 

 riifescem\<\\\(:\\ is merely a young example of H. {Arianta) arbusloriiiii 

 and shows that the H. rufescetis has been wrongly identified by all 

 authors since Pennant's time. A note upon this subject by the 

 writer has appeared in the "Annals & Mag. Nat. Hist., 1913, vol. xi., 

 pp. 263-4. 



II. Figured Specimens. 



(pennant's NOMENCLATURE.) 



1. Pholas crispata Linn. = 



2. Mya trimcata Linn. = 



3. Mya arenaria Linn. = 



4. Mya 7iiargaritifera Linn.= 



5. A'lya pidoruin Linn. = 



6. Solen vagina Linn. = 



7. Solen legicnien Linn. = 



8. Soleji cultellusYQ.nn.{non 



Linn.) = 



9. Tellina cornea Linn. = 

 I o . Cardiiwi aculeatum Li n n . = 



11. Cardium edule lAnn. = 



12. Cardium ciliare = 



1 3 . Cardium Iczvigatuin Pen n . = 



(Linn.?) 



14. Macira solida I^inn. = 



15. Mactra stultorum Penn. 



(non Linn.) = 



i6. Mactra liitraria Linn. = 



17. Venus niercenaria Penn. 



(non Linn.) = 



18. Venus erycina Penn. 



(non Linn.) = 



19. Donax trunculus Penn. 



(non Linn.) =: 



(MODEKN NOMENCLATURE. ) 



Zlr/iea crispata 



Mya trnncata 



Mya arejiaria 



Margaritana margaritifera 



Unio pictoriim 



Solen vagina 



Pharus legumen 



Solecurtus antiquatus Pult. 

 Sphieriuui corneuin 

 Cardium aculeatum 

 Cardium edule 

 Cardium aculeahan, juv. 

 Cardium {Lcevicardium) norvegicum 



Spengler 

 Spistila solida 



Spisula subtruncata DaCosta 

 Lutraria lutraria 



Cyprina islandica (Linn.) 



Venus verrucosa (Linn.) 



Donax vittalus (Da Costa.) 



