LTTSITANIAN PEOVUTCE, 



63 



The following are at present peculiar to Britain : — 



Assiminea, sp. Odostomia, 19 sp. ? Montacuta fermginosa. 



Jeffreysiaj sp. Buccinum fusifonne. Argiope cistellula. 



Otina Oiis. Fusua Berniciensis. Pecten niveus. 



Kissoa, sp . „ Turtoni. Sj-ndosmj'a tenuis. 



Stylifer turtoni. Natica Kingii. Thracia villosiuscula. 



The most common edible species are : — 



Ostrea edulis. 

 Pecteu maximus. 

 „ operoulai-is. 



Mytilus edulis. 

 Cardium edule. 

 Buccinum undatum. 



Fusus antiquus. 

 Littorina littorea. 



Amongst the species characteristic of the Celtic province — or 

 most abundant in it — are the following : — 



Trophon luuricatus. 

 Nassa reticulata. 

 Natica Montagui. 



„ monilifera. 



„ nitida. 

 Velutina lee^igata. 

 Turritella communis. 

 Aporrhais pes-pelecani. 

 Rissoa cingillus. 

 Scalaria Trevelj-ana. 



Littorina litt oralis. 



Trochus Montagui. 

 „ millegranus, 

 „ tumidus. 



Patella vulgata. 

 „ pellucida. 



Acmaea virginea. 



Chiton cinereus. 



Scaphander lignarius. 



Tellina crassa. 



Venus striatula. 



„ casina. 

 Donax anatinus. 

 Solen ensis. 

 Pholas Candida, 

 Mactra elliptica. 



,, solida 

 Periploma praetenuis. 

 Tliracia distort a. 

 Syndosmya prismatica. 



The wide expanse of the Baltic aflFords no shell-fish unknown 

 to the coasts of Britain and Sweden. The water is brackish, 

 becoming less salt northward, till only estuary shells are met 

 with, and the Littorinse and Limnseans are found living to- 

 gether, as in many of our own paarshes. This scanty list is 

 taken from the Memoirs of Dr. Middendorff and M. Boll. 



Buccinum undatum. 

 Purpura lapilhis. 

 Nassa reticulata. 

 Littorina littorea. 

 Patella (tarentina). 

 Hydrobia muricata. 



Neritina fluviatUis. 

 Limnaea auricularia. 



„ OTata. 

 Mytilus edulis. 

 Donax (trunculus). 

 Cardiimi edule var. 



TeUina Balthica. 



„ tenuis. 

 Scrobicularia piperata. 

 Mya arenaria. 

 „ truncata. 



Meyer and Mobius collected the following species at Kiel 



Chiton cinereus. Eissoa parva. Cerithium reticulatum. 



Acmsa testudinaUs. Littorina littorea. Nassa reticulata. 



Eissoa labiosa. „ littoralis. Buccinum undatum. 



„ inconspicua. „ tenebrosa. Fusus antiquus. 



„ ulvae. Lacuna vincta. 



„ ventrosa. „ pallidula. 



ly. LusiTANiAi^ Province. 



The shores of the Bay of Biscay, Portugal, the Mediterranean, 

 and N. W. Africa, as far as Cape Juby, form one important 

 province, extending westward in the Atlantic as far as the Gulf- 



