LEPTOCHLAMYS AMPULLACEA. 147 



once distinguished from Hi/alosphenia by its circular 

 cross section and circular mouth. " It is a thin, trans- 

 parent, chitinoid shell, generally somewhat obliquely 

 ovoidal (or ellipsoidal), and possesses a slightly ex- 

 panded, minutely bell- shaped mouth at the narrower 

 or ventral pole. The shell is quite firm and rigid, and 

 the body-protoplasm of the animal completely fills it, 

 fitting closely to the inner surface. The nucleus, 

 which, as compared with that of other lobose rhizo- 

 pods, is exceedingly large, is situated towards the 

 extreme dorsal pole of the shell, and exhibits a finely 

 punctate appearance. The body-protoplasm is of a 





FIG. 103. Leptochlamys ampullacea. Lateral views of two examples, 

 and oral view. Llyn-y-cwm-ffynon, N. Wales. From drawings by 

 G. S. West, x 520. 



dull grey colour, and is filled with granules of variable 

 magnitude, more especially in the region immediately 

 ventral to the nucleus." * The single broad hyaline 

 pseudopodium of this animal is a remarkable feature. 

 " At most, it becomes retuse at the broad, distal end, 

 and at all times there is a well-marked separation into 

 ectoplasm and endoplasm." The author considers it 

 closely related to Gryptodifflugia Penard. It differs from 

 that genus in the character of the pseudopodia, Crypto- 

 difflngia being figured by its author with pseudopodia 

 which are very long and narrow. 



* [Evidently the region between the nucleus and the aperture.] 



