426 THE OCEAN WORLD. 
whether it be globulous, as in Fig. 196, tun-bottomed, as in Fig. 197, 
plain or biform, as in Fig. 198, or truncated, as in Figs. 199 and 200. 
These figures will give the reader some idea of the multiplied and 
elegant forms which the shells of the genus Hex sometimes assume. 
Fig. 201.—Helix citrina (Linnzus). Fig. 202.—Helix Stuartia (Sowerby). 
In connection with the genus Helix we shall note some kindred 
genera which our space only permits us toname. Such is the genus 
Bulimus, the European species of which are numerous; some of them 
Figs. 203 and 204.—Bulimus sultanus (Lamarck). 
very small, others of medium size ; of these Budimus sultanus (Figs. 
203 and 204). In Figs. 205 and 206, the Berry Pupa (Puga wva), as 
an example of another genus, is represented, 
Yet another typical form may be noted, which is found abund- 
antly amid the grass and in shrubs near brooks round Paris and 
elsewhere. It is Succinea putris, presenting a small, thin, diaphanous 
