160 The Scottish Naturalist. 



his possession that had only four molars on each side in the 

 lower jaw, and, he adds, most obviously there never had 

 been more. All the crania of this seal that have come under 

 my notice had the normal number of teeth in one shape or 

 other. In the lower jaw of a female I have, the posterior molar 

 has been attacked by caries immediately above the alveolar 

 margin, and is wasted about half-way across the tooth. This is 

 a smallish jaw, although evidently that of an oldish individual. 

 The female does not seem ever to attain to much more than 

 half the dimensions reached by the old members of the other 

 sex. In all the skulls that I have seen of this species, the 

 ascending processes of this intermaxilla are in contact with the 

 nasal bones to a much greater extent than is represented in the 

 figures of Ball, i Bell, 2 or Blasius. 3 Another curious feature 

 in the cranium of the Grey Seal is the unossified condition of 

 the sutures between the facial and cranial bones, which do not 

 appear to become anchylosed at any size or age. 

 St. Andrews, July, 1875. 



Captures of Helicidse at Moulin, near Pitlochry, Perthshire. - 

 The following list by no means pretends to be a complete list of the shells 

 of the district, but is simply an account of my own experience, and as such, 

 may be of use, if any conchologist should visit Moulin : — 



Vitrina pellucida — -very common under moss and stones. Helvetia cel- 

 lo Ha — abundant. 77. alliaria — less common than cellar/a. H. ptira — 

 common. H aysfalliua — rather scarce. 77". fulva — rare. Helix nemo- 

 ralis — not uncommon. 77. hortensis — less common than nemoralis. H 

 hispida — rather scarce. H fi/sca — not uncommon ; on nettles and coarse 

 grass. 77. aculeata—one specimen. H arbustorum — rather common ; 

 far. alpeslris — on the banks of Craigeour Burn. 77. rotundata — the com- 

 monest of the genus ; on one log of wood I counted about twenty speci- 

 mens. Bulimus obscurus — rare. Zita lubHca — common. Pupa umbtli- 

 cata — scarce ; among dead leaves. Clausilia rugosa — common, especially 

 on limestone rocks and roots of trees. 



The shells enumerated in the above list were collected in June, which 

 was this year rather a favourable month for mollusk-gatherers, on account 

 of the frequent showers. — H. Coates, Perth, August 1875. 



Helix caperata ■ — I found a white specimen of this shell at Troon, on 

 a wall facing the sea. — Id. 



A New British Moth.— In July last I had the pleasure of taking a few 

 specimens of Ablabia argcntana CI., a beautiful white Tortrix not pre- 

 viously recorded as British. It was found on the side of a mountain near 

 Blair Athole, where I was collecting in company with Sir Thomas Mon- 

 creiffe and Mr. W. Herd, who also secured a few specimens. A. argcn- 

 tana is rather local on the continent. — F. Buchanan White. 



1 Trans. Irish Academy, vol. 18. 2 British Quadrupeds. 



3 Saugethiere Deutschlands. 



