332 HISTORY OF GLANVILLE'S WOOTTON. 



Lamellibranchiata. In Glanville's Wootton thirty- 

 nine species have been taken, as follows : Lamelli- 

 branchiata, five ; Gasteropoda, fourteen ; and ter- 

 restrial, twenty. 



About the next two classes, Vermes and Protozoa, 

 I know almost absolutely nothing, and therefore am 

 able to make but a very poor list of them indeed. In 

 Linnean Transactions of 1864 Dr. Bastian describes a 

 hundred new species of worms. 



Lamellibranchiata. 



1. Spherium conneus. Common in water. 



2. S. lacustris. Common. 



1. Pisidium fontanale. Abundant in water. 



2. P. nitidum. Common. 



1. Unio tumidus. Large Mussel Shell. Common in 

 Roundchimneys Pond. Some of the specimens 

 are of an immense size. 



Gasteropoda. 



1. Bythinia tentaculata. Common in Roundchimneys 



Fond. 



1. Valvata piscinalis. Common in water. 



1. Planorbis nitidus. Common in water. 



2. P. spinorbis. Pond Snail. Common. 



3. P. lineatus. Rare. 



4. P. albus. Rare. 



5. P. vortex. Rare. 



6. P. complanatus. Common. 



