52 ZONITID. 
Sub-genus.—ViTREA Fitzinger. 
8. H. CRYSTALLINA (crystalline) Miller. Pl. II., f. 13, 13a. 
Depressed above, more convex below, thin transparent pearly white ; 
whorls 5, compressed ; south semi-lunar; zzzbclicus exceedingly 
small; A. 12mm. B. 34mm. 
The iridescent appearance and symmetrical form of 
this little shell cause us to regret that it is one of the 
smaller instead of the larger members of the genus. 
It is easily identified from its colour and the compressed 
appearance of the whorls, but especially by its umbilicus, 
which is so small that a pin of moderate size will hardly 
enter. 
It is common everywhere in moist sheltered situations. 
Var. I. complandta (/Jeff:). Nearly flat on both sides, 
the last whorl larger. 
Var. II. contrdcta ( West?.). Last whorl very narrow. 
Sub-genus.—CONULuS Fitzinger. 
9. TH. CRULVA Cowny) Aiuller. Pi. Us, tara: 
Pyramidal, thin, glossy, clear horn-colour, whorls 54; mouth 
narrow 3 z0¢/¢cus merely a slight indent, only found in adult speci- 
mens. A. 24mm. B. 25mm. 
This pretty little shellis a link between the /yalinie 
and the Hedices. Its quaint pyramidal shape prevents the 
possibility of mistaking its identity, 
Its distribution extends over the whole of the British 
Isles. Common under rotten branches, and logs and 
stones, and among moss in woods. 
