88 TESTACELLIDyE, 



slime. It is by no means timorous ; when placed on 

 the hand it will soon extend itself and crawl along, 

 and if an attempt be made to arrest its progress it 

 will bite savagely. I once made the experiment, and 

 have no intention of repeating it. 



The eggs of Testacella are very large, of an oval 

 form, and covered with a thick skin ; they are de- 

 posited separately underground, and the young are 

 excluded in from twenty-five to thirty days. 



I. Testacella halioti'dea,* Draparnaud. 

 Pl. VI. bis. 



Body capable of great extension, tapering in front, slender in 

 the middle and broader behind, skin thick, with transverse 

 wrinkles when the animal is resting, but nearly smooth when its 

 body is extended, of a dirty yellowish-brown colour, occasionally 

 more or less spotted with red, white, or black ; lips flexible and 

 capable of being extended ; mantle small, nearly covered by the 

 shell ; tentacles short, brown, tips very slightly swollen ; back 

 rounded, with two longitudinal furrows which extend down- 

 wards from the head to the front of the mantle, and are provided 

 with a series of ramifications or slender branch-like offsets ; 

 foot with a prominent border. Loigth about 3 inches ; Ungual 

 ribbon large, with about fifty rows of 51 teeth which are 

 curved and barbed like a fish-hook. 



Shell oblong, compressed, solid, of a dull aspect, with regular 

 close-set lines of growth ; epidermis moderately thick ; spire 

 very short, pointed, terminal ; front margin rounded ; hinder 

 margin obliquely truncated ; mouth very large ; lip thickened 

 and shghtly reflected towards the pillar where it has a fold. 



Inhabits gardens in a few places in England and 

 Ireland, and is common in Guernsey. Though this 

 remarkable mollusc has no doubt been, from time to 

 time, unintentionally imported from France and else- 



Resembling Haliotis (the marine ear-shell). 



