MOLLUSCA. 
131 
which it may possibly be merely a variety. The specimen, 
however, presents characters perfectly distinct from it.” 
Found by Miss Anne Macgillivray, among corallines brought 
up from deep water off Aberdeen. 
Genus Testacella (Page 54.) 
Animal with an elongated body, narrowed in front, and 
provided with two divergent grooves, issuing from the fore 
part of the mantle, and terminating at the head ; mantle small, 
covered with an auriform shell, situate on the hinder part of 
the body. 
1. Testacella Haliotoidea, pi. LIX, f. 17. 
Testacellus Haliotoides, Ferussac, Hist. Moll., pi. '8, f. 5; 
Testacella Haliotoidea, Drapernaud, pi. 8, f. 44, 45 ; Thomp- 
son, Ann. and Mag. Zool. and Bot., VI, p. 19 ; Ib., Mag. Nat. 
Hist., VH, p. 226, f. 39. 
Animal with cylindrical tentacles ; grey, yellowish, or pale 
reddish; spotted on the sides beneath in some specimens; body 
elongate, tapering from the shield to the head. 
Found in a garden, at Lambeth, by Mr. Sowerby. 
Genus Limax Ferussac. — (Page 55.) 
Animal with an elongated, lanceolate, granular body, cari- 
nated behind ; mantle shield-shaped, ovate, concentrically 
lineated, entirely enveloping the shell ; end of the tail taper- 
ing, and destitute of a gland ; pulmonary cavity situated in 
front of the body, respiratory orifice towards the hinder part 
of its edge, or behind the middle ; infracesophageal ganglion 
provided with two fissures below, presenting on each side of 
the medial line three gangliform prominences. 
The following is the arrangement of the Rev. B. J. Clarke. 
Section I. — Mantle produced behind, concentrically striate ; 
tail partially carinated. 
1. Limax Maximus, pi. LVHI, f. 3. 
Limax Maximus, Thompson, Ann. and Mag. Nat. Hist., VI, 
p. 18 ; Clarke, Ib., XH, p. 333, pi. 10, f. 1, 2 ; Limax macu- 
latus, Muller, p. 8; Drapernaud, p. 124, pi. 7, f. 10. 
Animal ash-coloured, spotted or immaculate ; tentacles 
venous-coloured ; keel long, white, and acute ; mantle with its 
hinder extremity produced, shield-shaped ; skin with small, 
linear rugosities, converging towards the caudal extremity. 
Variety 1. Drapernaud; pi. LVHI, f. 3. Shield spotted; 
back with black, longitudinal, broad lineations. 
Variety 2, pi. LVHI, f. 3. Ash-coloured and black. 
Cinereo-niger, Nilsson, p. 7. 
2. Limax arboreus, pi. LIX, f. 9, 10, 11, 12, 13. 
Limax arboreus? M. Bouchard Chantreux, Cat. des Moll. 
terres. et fluv. du Pas de Calais ; Limax glaucus, Clarke, Ann. 
and Mag. Nat. Hist., XII, p. 334, pi. 11, f. 4 to 10. 
Animal whitish-yellow, smooth, and variegated ; shield with 
two black, dorsal bands ; tentacles obscure. 
Found on trees covered with moss ; the Ash and Elm seem 
a favourite resort. 
Section II. — Mantle rounded behind, and concentrically 
striate; end of the tail carinated. 
3. Limax flavus, pi. LIX, f. 7, 8. 
Limax favus, Drapernaud ; Clarke, Ann. and Mag. Nat. 
Hist., XH, p. 338, pi. 11, f. 11, 12; Limax variegatus, 
Ferussac. 
Animal yellowish, spotted with brown ; the tentacles azure- 
blue ; mantle mottled with yellow ; body more or less spotted 
with yellow, and the sides pale yellow. 
Found in cellars and damp ground floors, and rarely upon 
trees. 
Section III. — Mantle truncated behind, concentrically stri- 
ate; end of tail carinated. 
4. Limax agrestis, pi. LIX, f. 16. 
Limax agrestis, Linn. Syst. Nat., H, p. 1082; Nunneley, 
Local Cat., pi. 1, f. 4; Thompson, Ann. and Mag. Nat. Hist., 
VI, p. 19; Clarke, Ib., XII, p. 338, pi. 12, f. 13. 
Animal grey or reddish, frequently spotted with brown ; 
body with interrupted furrows, and provided with a short, 
oblique carina ; mantle large, ovate, rounded behind, and con- 
centrically striate. 
Inhabits fields and open situations. 
Section IV. — Mantle truncated behind, granulated or sha- 
greened; back carinated from the mantle to the extremity. 
5. Limax Sowerbii, pi. LVHI, f. 6, and pi. LIX, f. 14. 
Limax Sowerbii, Ferussac, Hist. Moll., pi. 8 D, f. 7 ; Alder, 
Mag. Zool. and Bot., II, p. 105; Clarke, Ann. and Mag. Nat. 
Hist., XH, p. 338, pi. 12, f. 14, 15. 
Animal pale yellow, tessellated with brown, head and ten- 
tacles black ; mantle granulated, with a furrow near its margin ; 
dorsal keel amber-coloured, and very conspicuous; sides cream- 
white. 
Found in open situations. 
6. Limax gagates, pi. LVHI, f. 4, 5, and pi. LIX, f. 2, 
3, 4, 5, 6. 
Limax gagates, Drapernaud, pi. 9, f. 1, 2; Clarke, Ann. and 
Mag. Nat. Hist., XII, p. 339> pi- 12, f. 16 to 22. 
Animal shining black ; body with subrugose striae, the back 
carinated; mantle truncated posteriorly, and granulated; cir- 
cumscribed by an elevated ridge, which meets in a point near 
the pulmonary orifice, making the upper portion of the mantle 
appear more prominent than the rest ; back abruptly carinated 
its whole length from the mantle ; when at rest the keel pro- 
jects above the mantle, and forms a carinated ridge. 
Variety 1. Ferussac; pi. LVHI, f. 4, 5, and pi. LIX, f. 2. 
Lead-coloured or greyish-black. 
Variety 2. Clarke. Brown ; with the sides of the mantle 
yellowish. 
Found by the Rev. B. J. Clarke, at Tourmakady Lodge, on 
the borders of Lough Mash, Ireland. 
Sub-Genus Bull^a. — (Page 57-) 
3. Bull^a catenulifera. 
Bullcea catenulfera, Macgillivray, Moll. Ab., p. 187. 
Shell very thin, transparent, pure white, oblong, cylindrical, 
. truncate above, wider and rounded below ; aperture extending 
the whole length of the shell, narrowed above for about a 
fourth of its space, and then dilated into an oblong truncated 
form ; outer lip very thin ; columella exposed, and gently 
