122 



GENERA AND SPECIES. 



272. hispida, 

 286. sericea, 



283. rotundata 



271. fiisca, 



263. aculeala, 



274. lamcllata, 



282. revelata, 



Without labial rib 



in. no keel and no stripes, umbilicus small. 

 in. 



no keel and no stripes, greyish white, 

 transparent, umbilicus very small. 



in. bluntly keeled. 



in. wrinkled. 



in. raised periostracum, whorls 4 to 4^, mouth 



semicircular. 

 in. raised periostracum, whorls 6, mouth cres- 



cent-shaped. 



in. greenish, hispid, transparent, umbilicus 

 large. 



The species of Helix vary much in coloration, ; of many of them there are white 

 varieties which it is not necessary to particularise. Of 265 there are varieties that are whitish 

 or yellowish, and one that is reddish brown with a single white stripe, and there are two 

 dwarf varieties. Of neinoralis and hortensis the varieties are too numerous to trouble about, 

 a new one can be found in almost every parish ; arbustorumaXso varies very much in ground 

 colour. Of 268 there is a variety rufilabris, which has a brown labial rib ; of 287 the most 

 marked variety is subglobosa, which has a double band above the periphery, and of 267 there 

 is subscalaris. which has a conical shell. 



Hermaea. (HERMJEID^.} Plate xxxi. 



bifida, i in. body linear. 



586. dendritica, in. body ovate. 



Hero. (.EOLIDIDsE.) Plate xxxi. 



596. formosa, i in. rosy, with three whito lines. 



Homalogyra, (HOMALOGYRIDJE.) Plate xxiii. 



385. atornus, ^ in. smooth or obscurely ridged. 



386. rota, ^ in. ribbed and keeled. 



Hydrobia. (HYDROBIIDM.) Plate xxiv. 

 429. jenkinsii, J in. mouth circular. 



426. ulvce, 



427. similis, 



428. ventrosa, 



in. whorls 7 or 8, mouth oval, narrowly 

 angulated. 



in. whorls 5 or 6, suture deep, shell oval and 

 stout mouth oval. 



in. whorls 6 or 7, suture rather deep, shell long 

 and narrow, mouth oval. 



lanthina. (IANTHINID.E.) Plate xxii. 

 357. fragilis, i^ in. outer lip entire, broad pale streak around 



358. rotundata, 



359. cxigua, 



pillar. 



in. outer lip entire, no streak around pillar. 

 in. outer lip indented. 



