198 THE ZOOLOGIST. 
H. cellaria, Miiller.—One of the more uncommon land-shells 
of Malta; found under stones in damp and shady spots. 
H. Erdelii, Roth.—Not common. 
Genus CLAUSILIA. 
C. syracusana, Philippi = C. macrostoma, Cantraine.— Very 
common, with many varieties differing from one another in the 
character of the striation of their shells. This is also abundant 
in Gozo, Comino, and Filfla. ; 
C. bidens, Linn. = C. papillaris, Miiller—Very common, both 
in Malta and Gozo. 
C.scalaris, Pfeiffer = C. delicate, Gulia; C.scalaris, Caruana.— 
This beautiful Clausilia, peculiar to the island of Malta, appears 
to have been first discovered by Admiral Spratt, near St. Paul’s 
Bay, and was first described by Pfeiffer and again by Dr. Gulia.* 
The habitat of this Clausilia is very restricted. I found it on the 
Upper Limestone, along the western shore of St. Paul’s Bay, from 
nearly opposite Selmun Island, to the little cove of Cala Mistra, 
extending inland to the borders of a line of fault, which, extending 
N.N.E. and 8.8.W., exposes the marl and underlying caleareous 
sandstone. I was unable to trace this Clausilia beyond the line 
of fault, and it would appear that the exposure of the lower beds 
has acted as a barrier to the extension of the species inland. In 
the limited area occupied by C. scalaris I did not obtain specimens 
of C. syracusana, Cantraine, so widely diffused over Malta and 
Gozo. 
C. mamotica, Gulia.— This species, described by Dr. Guliat 
in 1861, and subsequently, under the same name, by Dr. Caruana 
in 1867, is confined to a limited area in the island of Gozo— 
namely, on the left side of the gorge of Sclendi. 
Genus PLANORBIS. 
P, species ?—This small species is found in the reser- 
voir in the Floriana Gardens, in the aqueduct leading to Valetta, 
in a stream near Selmun Palace, in the watercourse of the gorge 
of Sclendi in Gozo, and in most places throughout the islands 
where there is a perennial supply of water. 
* «Tentamen Ichtyologie Melitensis,’ Malta, 1861, p. 7, 
+ Op. cit., p. 8, 
