40 INVERTEBRATE ANIMALS. 



H Examples of Solaropsis, Aiichlstoiiia, Ibenis, 

 Theha, dec. 



Group 114— Sub-family HELICIN^. Part II. The up- 

 turned mouth of Anostoma indicates that the adult 

 animal must move with the spire of the shell downwards. 

 The West-Indian tribe, allied to Lucerna, Macrocyclis, 

 &c., includes some of the largest and smallest of the 

 Helices. Estimated number of species: recent, 200; 

 British, 6 ; fossil, a few. Tertiary. 



*J Examples of Acavus, Cochlea, Lucerna, Macro- 

 cyclis, &c., including a fine series of the rare 

 Malayan genus Geotrochus. 



Group 1 15.— Sub-family HELICIN^. Part III, Estimated 

 number of species : recent, 200 ; British, 3 ; fossil, a 

 few. Tertiary. 



^ Examples of Streptaxis, Helix, Helicostyla, &c. 

 In the Philippine Islands the Helices attain their 

 highest beauty of form and colour ; e.g., Cal- 

 licochlias, Corasia, and Helicostyla. 



Group 116.— Sub-family PUPIN^. Pupa, a doll. Esti- 

 mated number of species : recent, 574 ; British, 16 ; 

 fossil, 50. Tertiary. 



H Examples of Piqm, Clausilia, Cylindrella, &c., 

 and of most of the generic forms in this 

 extensive group. 

 Note the form and sculpture of some of the more 

 slender species of Cylindrella, a West Indian 

 genus. 



Group 117.— Sub-family BULIMIN^. Part I. (SovKii^oi, 

 hunger. Estimated number of species : recent, 480 ; 

 British, 5 ; fossil, 0. 



