haliotideus, scutulum^ Maugeiy and amhiguiis, 229 



[a pallide lutescens, iramaculatum Fer. Hist vol. i. p. 94. t. viii. fig. 5. 

 to 9.] 



[It is this last condition of the species which is figured by Ferussac, 

 whose figures are copied in our Jig, 41. «, A, c : a, seen from behind ; b, as 

 seen when contracted ; c, the shell, as seen on the inside. In Sowerby's 

 Gen.y No. i., two views of the shell of this species are given, to contrast 

 with those of T. scutulum and Maugei, there also exhibited. " T. halio- 

 tldeus is not uncommon in France." (G. B. Sowerb^y in Gen.) It is 

 a native of France and Spain. (Mr.Lukis, in p. 225.)] 



T. scutulum G. B. Sowerby. Testa ovata, antice paulum acuminata, extus 

 plana, clavicula arcuata, elevata. The animal bears a near resemblance 

 to that of T. haliotideus, not having the double row of tubercles running 

 from the head to the anterior part of the shell, so conspicuous in T. 

 Maugei. G. B. Sowerby, in Gen.y No. i., fig. 3, 4, 5, 6. [Of these figures 

 of T. scutulum, derived from an animal or animals taken in the neigh- 

 bourhood of London, fig. 3. represents a front view of the animal ; 

 fig. 4., a view of the same animal when extended; fig. 3. (copied in our 

 Jig. 41. e)y an outside view of the shell magnified; fig. 6. (copied in our 

 Jig. 41. d)y an inside view of the shell magnified. If the Guernsey Testa- 

 cellus i^Jig' 39.) be, as I have, in p. 226., conjectured it to be, of the 

 species T. scutulum, then j%. 39. farther exhibits the animal, the shell, and 

 the eggs of this species, and all of the natural size ; and Guernsey may be 

 added to the habitats of this species already noted in p. 224.] 



T. Maugei Ferussac. Animal: Rufescens; maculis brunneis sparsis or- 

 natis; tentaculis filiformibus; ora corporis aurantia. Testa: Ovato- 

 elongata, fulva, exilis, striatula ; spira elevata ; clavicula angusta. Fer. 

 Hist, vol.i. p. 94. t.viii. fig. 10. 12., Sowerby Gen. No. i. fig. 7. to 10.] 



[The synonymes exhibited by Ferussac, under T. haliotideus and 

 T. Maugei, teach that these two species had been more than once con- 

 founded. Our^g. 40. Cy (repeated in VI. 45., and VII. 225., from 

 the Encyc. of Agriculture y ed. 2. § 7706.), is wholly erroneous, as com- 

 pared with Ferussac's figures, in the matter of the part of the animal in 

 which the lateral furrow is commenced. In Ferussac's figures, the 

 furrow is represented as commenced in this species (T. Maugei) just in 

 front of the shell, and as carried thence to each of the two sides of the 

 animal's body. Fig. 40. c? is a view of the shell of this species, taken 

 (as well as that of the animal c, though this too inaccurately) from an 

 individual derived from Bristol; oxxdjig. ^\.f,g are views of the shell 

 copied from Ferussac's figure. " T. Maugei is a native of Teneriffe ; 

 but [is] naturalised in a garden at Bristol." — G. B. Sowerby y in Gen.] 



T. ambiguus Ferussac, Animal [unknown]. Testa : Depressiuscula, fra- 

 gilis, subtiliter striata ; pallide viridis ; spira indistincta ; apice occultata ; 

 apertura amplissima, simplici. 



[Ferussac has (in ^i^^. vol.i. p. 95. t.viii.) given two views of the 

 shell, which are copied in ouvjig. 41. A, i. " We cannot consider De 

 Ferussac's ambiguus as a species, inasmuch as it has every appearance 

 of being an internal shell [of some species of the family of slugs]." — . 

 G. B. Sowerby y in Genera, under T. scutulum.] 



Ferussac has consigned eight folio pages, and twelve figures 

 besides, to the elucidation of the three species quoted from 

 him : but the greater portion of the descriptive matter is an 

 exposition, in a generic manner, of the anatomy, faculties, 

 habits, and manners of the Testacelli; that is, of the two 

 species (haliotideus and Mauge/), with the animals of which 

 he is acquainted. He has, besides, in another part of his 



Q 3 



