90 HELICID-#. 
Var. XV. riifulozondéta (Taylor). Coloured 
like Zutescens with a single dark peri- 
pheral band. 
d. colour | Var. XVI. suddélbida (Poiret). One band 
and | * above periphery, rest of shell white. 
markings. | War. XVII. dlbicans( Grat.). Whitish with- 
out markings, xuclews dark. 
Var. XVIII. dlba (Taylor). Pure white, 
markings (if any) translucent. 
€. monstrosity. m. sézéstrorsum (Taylor). Reversed. 
Sub-genus.—TURRICULA Beck. 
25. H. TERRESTRIS (earth inhabiting), Tennant. Pl. IV., f. 6. 
Pyramidal, greyish white with a broad dark band round each whorl, 
‘closely and evenly ribbed in line of growth ; very sharply carinated, 
the fee/ forming ridges round the shell ; whorls 8 ; mouth depressed 
and sharply angulate. A. 53mm. B. 9 mm. 
A colony of this Mediterranean species was noticed by 
Capt. McDakin, in 1890, near Dover, where it has now 
established itself. It is not at all clear how it came there, 
but it is just possible that, situated as it is near a railway 
bank, some foreigner threw some rubbish containing the 
shells out of the train window. Mr. E. A. Smith (Journal 
of Conch., vol. 6, p. 379) remarks :—‘ This is not the first 
record of it as British, for Jeffreys (Brit. Conch., I., p. 215) 
mentions the existence of a specimen in Dr. Turton’s 
collection of British shells, marked ‘Cornwall,’” and 
although he questioned its claim to be considered British, 
