BECHER : MOLLUSCA OF THE MALTESE ISLANDS. 235 



Zonites cellarius Miill. — Feilden gives this as 'one of the 

 more uncommon land shells,' which is precisely my experi- 

 ence. Some Zonites, very similar to Z. cellarius Miill., I 

 submitted to Mr. E. A. Smith, of the British Museum, 

 who kindly examined them and gave his opinion that they 

 were doubtful cellarius. Mr. J. W. Taylor was good 

 enough to report on them, and writes : ' I am inclined to 

 consider them Hyalima aequata Mousson. 



Z. crystallinus Miill. — This species is not mentioned by 

 Feilden. Mr. J. W. Taylor has confirmed my naming. 

 I found in all six specimens, under stones on Manoel 

 Island. I searched for them on many occasions but could 

 find only these six, which were in pairs, and near the new 

 Naval Torpedo Pier. Two I gave to the Valletta Univer- 

 sity, two to Major Feilden, and two are in my collection. 

 Benoit gives it as abundant near Palermo near Madonie. 

 I have also found a very few var. hydatina Rossm. (deter- 

 mined by Mr. J, W. Taylor). 



Clausilia syracusana Phil.=C. macrostoma Cant. — Very 

 common and universally distributed, except in the area in 

 which C. scala?'is Pfeiffer abounds. The specimens I found 

 on Filfla have the longitudinal striae on the last whorl much 

 stronger, and, in fact, are finer than those on the mainland. 

 Benoit states it inhabits the neighbourhood of Syracuse. 



C. bidens Linn.= C. papillaris Drap. — This prettily-marked 

 Clausilia is not so common as the preceding. Common 

 in Sicily. 



C. scalaris Pfeiffer=C. delicatce Gulia=:C scalaris Caruana. 

 — Concerning the history of this Clausilia Feilden says, 

 ' It 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.' Its habitat is very restricted, 

 extending from Cala Mistra along the coast to a point 

 where a fault intersects the coast line opposite Selmone 

 Island. Its boundary on the land side is a fault where 



