naturalist’s calendar. 
429 
plied into two species. Our later writers supposed the provincial name “ pipit” 
or “ pipit-lark,” to signify the meadow-pipit, (An thus pratensis) in its winter 
plumage, and the term “ tit lark” they referred to the same species in its summer 
garb. This application, however, of the two provincial names is incorrect; the 
“ tit lark” of bird-fanciers and bird-catchers being the tree-lark or tree-pipit (A 
arborem) of naturalists, while the meadow-pipit (A pratensis) of naturalists is, at 
all seasons, and in every state of plumage, provincially known by the name of 
“ pipit,” or pipit-lark.— Field's Not.. Mag. 
Squirrels.—A very marked variety, if not a distinct species of squirrel exists 
in England, which does not appear to be noticed by any author, ft is generally 
when full grown, rather larger and stronger built than the common squirrel, the 
fur is much coarser, and of a very red colour, the tail is more bushy and hand¬ 
some, and the ears are rounder, and not furnished with those long hairs which 
adorn the ears of the common squirrel. 
[We regret to state that the Wood Cut which should have occupied the blank 
space in this page of the Register is, through Ihe negligence of the Engra¬ 
ver, unavoidably omitted. The printing of the present sheet was deferred 
to the last moments in the hope of obtaining the cut in time, but after all no 
other alternative remained to us than to pledge ourselves for its appearance 
in the next number.] 
Molluscous Animals. —The shell (fig. 6) Clausilia bidens is said to be a 
native of Wales and Scotland; it is half an inch long, pale brown colour, and 
obliquely striped with a darker colour, Under stones and in old walls, however, 
another species, the Clausilia rugosa (fig. 7) is common enough ; it is about the 
same size as the last, but instead of being pale brown, is usually of a glossy black, 
sometimes grey, and often marked with light lines. In slow running shallow 
rivers is the Neritina fluviatilis, (fig. 8) it is something less than half of an inch 
long, and quarter of an inch broad, and is usually found adhering to the stones. 
The shell is of a greenish or whitish colour, and variously chequered with spots 
I or bands of white, brown, purple or pink. The Limacellus Unguiculus (fig 9) is 
i found in the interior of the large grey slug, with a yellowish ridge down the 
1 back, called the Limax carinatus. This shell is about quarter of an inch long, 
and little more than half that in breadth. The Limacellus Parma (fig. ID) is 
| about double the size of the last, and is found in the Limax maximus, or dark 
j grey slug. All the genus Limacellus arc found within such of the slugs as have 
I a carinated ridge down the back, at least on its lower extremity, and 
none else. Thus the large grey slug, with stripes of darker spots, is armed 
with this internal testaceous shield, but the. common black or brown slug 
has none, or the mere unformed rudiments. In the fissures of rocks, 
I amongst the mosses and Lichens which will be found growing on old apple trees, 
