AND THEIR CLASSIPICATldlS". 115 



The species stands nearest to H. minuta, Cash (Trans. Man- 

 elaester Micr. Soc. 1891, p. 49, pi. 11, figs. 3-4), but the form of 

 the shell is diflferent, the mouth being much broader and more 

 truncate, and the body-protoplasm and pseudopodia exhibit 

 rather different characters. 



9. HtalospheniAu inconspictja, sp. n. (PI. 13. figs. 7-11.) 

 Yery minute ; shell thin, of a reddish-brown colour, in front 



view with an almost circular outline, the basal portion being 

 slightly protracted to form a short neck ; mouth small and 

 truncate ; in side view, shell ovate-elliptical in form, with a 

 notched mouth. Protoplasmic body occupying only about half 

 the cavity of the shell and furnished with a small nucleus ; with 

 one short pseudopodium ; contractile vacuoles not observed. 



Length of shell 14-5-17 /x; breadth of shell 12*5-16 //; 

 breadth of mouth 6*5-7'7 p ; thickness of shell 8"6 ^i. 



Sab. Lough Gartan, Co. Donegal, Ireland. 



This minute Syalosphenia^ which is considerably smaller than 

 any other known species, was observed in quantity from the 

 above locality in May 1901. The almost circular outline of the 

 shell aud the reddish-brown colour are characteristic. The 

 animals were very sluggish, and only protruded one small 

 pseudopodium. 



Eamily EuaLTPHiNA. 

 Genus Eugltpha, Dujardin, 



10. Eugltpha ceistata, Leidy, in Proc. Acad. Nat. Sci. 

 Philad. 1874, p. 226; Freshw. BUz. N. Amer. 1879, p. 218, 

 pi. 37. figs. 1-4. 



Length of shell (without bristles) 65-104 ix; breadth 27-31 jx. 



Sah. Ehiconich, Sutherland ; frequent. Also near Tarbert, 

 Harris, Outer Hebrides. 



Some of the examples were very rounded at the apex, but 

 others were more attenuated towards the apex, and also furnished 

 with a slight neck at the base. 



Genus Sphenodebia, ScMumheryer. 



11. Sphenoderia ptjlchella, sp. n. (PL 13. figs. 12-15.) 

 Shell ovoid or ellipsoid^ in vertical view circular, composed of 



