486 



VAGINULID^E. 



defined margin separating the central part from the edges ; the 

 latter are merely a little flatter ; there is not the least trace of 

 solid material in the covering or in the substance of the body. 

 The superior pair of horns are cylindrical, somewhat longisb, and 

 terminate in a little rounded bulb, on the upper surface of which 

 the minute black eye is imbedded ; the buccal pair is bilobed, but 

 not deeply sulcated, appearing exactly as if two short cylinders 

 were under a skin. The foot terminates a little before the end 

 of the mantle ; it occupies in breadth about one-fifth or rather 



Fig. 156. Vaginulus maculatus. 

 (Copied from A. M. N. H.) 



Fig. 157. Vaginulus maculatus. 

 (After Templeton.) 



more of the under surface, and is separated by a deep groove 

 from the mantle, so that it appears as if winged ; it has about 

 200 transverse ruga3 in the inch, which, in the advancing move- 

 ment of the animal, present precisely the same appearance as the 

 legs of Julus, a wave running from behind forward, about six 

 ruga3 forming each wave, with an interval of fourteen to eighteen 

 between them. The under surface of the body of the animal on 

 each side of the foot is covered with minute papilla or tubercles, 

 about 180 in an inch. 



"The habits of the animal, as far as I had an opportunity of 



