5106 Mollusks. 



and the individuals are all at least three inches long. Some of the 

 individuals are darker than the others ; some have one furrow, and 

 others two furrows, extending from the shell to the anterior part of 

 the body : each has four tentacles, the two posterior carrying the 

 eyes. The animal has the power of so porrecting the lip as to lead 

 a superficial observer to suppose the animal has six tentacles. 



The shell is small, of a dark brown colour, much darker than any 

 part of the animal ; it is but faintly striated, and scarcely more than a 

 mere scale. Tn shell this species is more like T. haliotoidea than T. 

 Maugei, the shell of the latter being deeper and better developed. 



Owing to the ignorance of naturalists as regards the special dis- 

 tinctions of this interesting family, it may be that some of the species 

 described in this paper are identical with T. Medii Templi; but, so 

 far as descriptions and an inspection of the shells of T. haliotoidea 

 and T. Maugei in the British Museum go, this certainly is a species 

 new to science. 



I agree with Mr. Sowerby that this family is very tender, all having 

 been found in sheltered situations and on a warm soil. They are 

 mostly found in the neighbourhood of greenhouses. My observa- 

 tions have led me to the fact that they frequent dry, porous, rich and 

 loamy soils (such as Lambeth, Kennington, Kensington, and the 

 Middle Temple Gardens), and are not to be found in stiff, clayey soil. 



Habitat. — The gardens of the Honourable Society of the Middle 

 Temple, London. It is found in one part of the gardens only, under 

 the protection of a south-west wall. It has been known to the 

 intelligent gardener, Joseph Dale, for the last ten years. This is 

 truly a British species, as the garden is not manured with foreign 

 manures, and is in so secluded and surrounded a spot that it cannot 

 have been accidentally or recently introduced. 



Habits. — The attention of the gardener was first directed to this spe- 

 cies by the fact that on turning up the soil he brought to the surface 

 a slug, with a portion of a worm sticking from out its mouth. Being 

 struck by the singularity, as he considered, of this fact, he deposited 

 the slug in a glass vessel to observe it. On the following day 

 he found the slug had gorged the worm entirely. Since that period 

 he has constantly turned up similar slugs ; and on mentioning the 

 fact to me he procured me seven specimens, about the end of Decem- 

 ber last. They were all found together, and in a semi-torpid state, 

 under the south-west side of a high wall. I am informed that 

 though they for the most part are found underground, yet occasionally 

 they visit the surface. 



