224 



Characteristics and Habits of a Testacellus 



longitudinally into two equal portions, except at the lowest 

 part, where they communicate (rf), the septum being wanting. 

 The intestine has its origin close to the termination of the 

 oesophagus, is extremely small, dilates into a cavity containing 

 a hard white spherical body the size of a pin's head, and then 

 makes a turn upon itself. The course it follows is shown by 

 the letters e in the cut. (Home's Comp, A?iat., vol. i. p. 373.) 



Art. IV. A Notification of the Occurrence^ in the Island of Guern- 

 sey , of a Species of Testacellus, and of some of its Characteristics 

 and HabitSi as observed there. By Frederick C. Lukis, Esq. 



A SPECIES of Testacellus is rather abundant in certain lo- 

 calities in this island (Guernsey); and I send drawings of it 

 {fg, 39.) for comparison with the characteristics of T. scutu- 



lum Sowerbi/, as exhibited in the individuals of that species 

 found, as stated in VI. 43. to 46., at Stamford Hill, Lambeth, 

 Kensington, Bayswater, and on the side of the road from 

 London to Hampstead; and with the characteristics of T. 

 Mauge/, as figured in VI. 45. I avoid, purposely, applying 

 a specific name to the species which occurs here, because 1 

 have never been able to ascertain, correctly* the distinctive 

 differences of the few species which have been published ; 

 namely, T. haliotideus \_Faure Biguef], sciitulum Sowerbi/, 

 Mauge/ Ferussac, and ambiguus FerussaCi with corneus and 

 costatus of M. de Roissy. Besides, therefore, the identifica- 

 tion of the species represented in my drawing, information 

 on the differential characteristics of any of the species will be 

 very acceptable. 



I had hoped that the late Mr. Miller of Bristol would have 

 made some enquiries about the species which occurs here ; for 



