LEPTOOHLAJiyS AMPULLAGEA. 147 



once distiiiguislieil from Hi/alospJoeui'i hy its circular 

 cross section and circular nioutli. " It is a tliin, trans- 

 parent, chitinoid shell, generally somewhat obliquely 

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

 panded, minutely l)ell-sliaped mouth at the nari'OAver 

 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 

 23unctate appearance. The body-protoplasm is of a 





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Pig. 103. — LeptocJdaviys aiiipuUacna. Lateral views of two examples, 

 and oral view. Llyn-y-C'wm-ttvnon, ^N. Wales. From drawings by 

 G. S. West. X .520. 



dull grey colour, and is filled with granules of vai'ial)le 

 magnitude, more especially in the region immediately 

 ventral to the nucleus." * The single broad h^-aline 

 psendopodium of this animal is a I'emarkaljle feature. 

 " At most, it becomes refuse at the liroad, distal end, 

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

 ectoplasm and endoplasm." The author considers it 

 closely related to (Jri/jjtodifffii/jia Penard. It differs from 

 that genus in the character of the pseudopodia, Cri/pto- 

 diffliiqia lieing figured by its author with pseudopodia 

 which are very long and narroAV. 



* [Evidently the region Ijetween the nneleus and the aperture.] 



