RHIZOPODA AND HELIOZOA OF SCOTLAND in 



Locality. — Ground moss. Ecclesall (Sheffield), 1910 ; Bass 

 Rock and Isle of May, 191 1 ; St Kilda, 191 1 ; Dore (Derby- 

 shire), Surrey, 191 1. 



EUGLYPHA DENTICULATA, n. sp. (PL V., Figs. 5-1 1). — 

 In broad view the test is ovoid (oviform), bluntly rounded 

 posteriorly, broadest about one-third the length from 

 the posterior end, from which point the lateral margins 

 descend, narrowing very slightly at first, then more abruptly, 

 to the borders of the much-contracted mouth. The test is 

 compressed laterally to about one-half the width, giving 

 an elliptical outline to both dorsal and narrow side views. 

 No spines are present, and the test is transparent and 

 colourless. 



The surface appearance is very characteristic. The 

 plates, which are small and numerous, are elongated with 

 obtusely rounded ends, and arranged in regular rows alter- 

 nately placed, and so disposed that considerable overlapping 

 is produced from end to end, and only very slight from side 

 to side (PL V., Fig. 11). The imbricated end-portions stand 

 out very prominently, while the lateral margins are in- 

 distinctly seen, and this gives on superficial examination 

 a scalariform appearance to the surface of the test (PL V., 

 Figs. 6 and 7). 



The mouth is elliptical, obscure, and much contracted, 

 and the outline of the end-plates not easily seen. Towards 

 the mouth the arrangement of the plates becomes less regular, 

 and the aperture itself is bordered by several (eight or nine) 

 rather irregularly arranged pointed plates, not always of equal 

 size, producing an unevenly denticulate appearance. 



The protoplasm is normal, and practically fills the test. 

 The posterior portion is clear, containing the distinctly seen 

 nucleus. The middle portion contains granules and food 

 bodies, while the anterior region is hyaline, and in the active 

 animal projects through the mouth aperture as a clear mass, 

 from which arise numerous delicate elongate pseudopodia. 



Size. — Length, from 43 to 48 fx ; breadth, from 23 to 

 28 i*. The proportions are slightly variable, and irregularly 

 formed specimens (Fig. 9) are occasionally seen. 



Locality. — Ground moss. Aberfoyle, 1910; Duddon 



