PARMUL1NA OTATHUS. 29 



Length 40-55 A*- 

 Habitat. Mosses . 



SCOTLAND. Perthshire (Brown). 



IRELAND. Louisburgh and Achill Island, Mayo 

 (Penard). 



The test is of a greyish or yellowish colour and too 

 opaque for the plasma to be clearly visible in the 

 living animal. No pseudopodia have been observed, 

 but the plasma often protrudes in a lobular form. 



Genus 16 a. CAPSELLINA Penard, 1909. 

 Capsellina PENARD in Arch. Protist. XVII (1909), p. 290. 



Body enclosed in a hyaline, ovoid, membranous sac, 

 with or without a second outer testaceous covering ; 

 aperture single, terminal, linear ; nucleus single, placed 

 posteriorly ; one or more contractile vesicles ; pseudo- 

 podia filose. Multiplication takes place by division. 



Only two species belonging to this genus have been 

 described ; C. bryorum Penard has in addition to the 

 inner membranous sac a dark brown outer test 

 similar in shape, composed of a membrane covered 

 with fine silicious or chitinous particles ; it is 3545 p, 

 in length. C. timida Brown has no outer envelope 

 and is the only species recorded, so far, from the 

 British Isles. 



Multiplication in C. bryorum takes place by binary 

 fission accompanied by the longitudinal division of the 

 envelopes. 



1. Capsellina timida Brown. 

 (Plate LVIII, fig. 8; PI. LIX, figs. 10-14.) 



Capsellina timida 



BROWN in Jrn. Linn. Soc., Zool. XXXII (1911), pp. 80-82, pi. ix, 

 ff. 9-13 ; in Scott. Natur. 1912, pp. 112, 113 ; in Naturalist, 1912, 

 p. 181. 



Test small, ovoid, membranous, hyaline ; longitu- 

 dinal section oval ; transverse section elliptical ; aper- 



