JONES : TERRESTRIAL M0LLUSCA IN SOUTH-WESTERN EUROPE. 367 



greatest care in handling, so readily were they broken. Shells were 

 fairly plentiful, but required carefully looking for at Arosa and Aranci 

 Bays, whilst at Gibraltar, Cagliari, and to a rather less extent at Cintra, 

 near Lisbon, they fairly swarmed. 



I am much indebted to Mr. J. H. Ponsonby for the kindness with 

 which he has helped me to name certain of my specimens, and also to 

 papers by him and by Dr. Kobelt. 1 



Parmacella calyculata (Sow.). — I found the shells of this species 

 fairly commonly in the rifts and crevices of the rock at Gibraltar on 

 the way up to the signal station, but I could never discover a living 

 specimen. I do not, however, concur with Dr. Kobelt and Mr. Pon- 

 sonby in considering it rare, for the shells are extremely plentiful, but. 

 the species has very likely increased since their observations were 

 made. Taken also at Algerciras. 



Hyalinia draparnaldi (Beck). — Like all the Hyalinicz this species 

 was rare at Gibraltar, and about half-a-dozen specimens, dead and 

 alive, represent all that I obtained in many weeks careful collecting 

 there. 



H. cellaria (Mtiller). — One or two specimens of this species were 

 taken on the top of the hill where the memorial to H.M.S. "Serpent" 

 is placed at Arosa Bay, in October, 1898. 



H. calpica (Kobelt). — A few specimens which I think may be 

 safely relegated to this species. 



Helix lenticulata (Fer). — This find adds another to the list of 

 inexplicable disappearances and recurrences of species, for Dr. Kobelt 

 in 1884 found this species commonly at Gibraltar, whilst after many 

 weeks' careful searching in 1898-99 three dead shells were all that I 

 could find. I found it also at Cagliari. 



H. coquandi (Morelet) var. ellioti (Kobelt). — Of the two forms 

 of this mollusc, the yellow shelled one is found all over the western 

 side of the Rock, whilst the five banded is, so far as I could ascertain, 

 confined to one small tract, consisting of about forty yards of a path 

 in the uppermost part of the Alameda Gardens, bordered by a species 

 of Aloe. Here this species is moderately plentiful, and here alone at 

 the present time the five banded form occurs, and although the yellow 

 one is found in other parts of the Rock as well, it is scarce, and 

 generally one at a time only can be taken. Another curious point is 

 the fact that I only found this snail occurring in the above mentioned 

 tract in the adult state during the last three weeks of November, 1899, 

 and although I searched most carefully during the same three weeks 

 of 1898 I never saw one there then. Dr. Kobelt, in May, found the 

 young of this species much more common than the adults, whereas 



1 /. Conch., vol. 4, p. i-9, 1883, p. 266, 1885. 



