CORYTHION PULCHELLUM. 99 



From Mount Conlough, Kerry, an individual was 

 obtained 58 ft in length and 37 /A in breadth, but this 

 size is abnormally large. In North America individuals 

 occur up to 42 /x in length. The form of the aperture 

 distinguishes it from G. dubium; it does not resemble 

 any other species. 



ENGLAND. Durham ; Westmorland ; N. & "W. York- 

 shire ; Derbyshire ; Shropshire ; Bedfordshire ; Hert- 

 fordshire ; Devonshire. 



SCOTLAND. St. Kilda (Outer Hebrides), Inverness- 

 shire, Elginshire, Perthshire, Isle of May (Fifeshire), 

 Argyllshire, Bass Rock, and Ayrshire (Browii). 



IRELAND. Armagh ; Mayo and the islands off 

 Bay ; Galway ; Wicklow ; Kerry. 



Family 3. G-ROMIINA. 



Test membranous, usually flexible, smooth or 

 covered with extraneous particles ; pseudopodia long, 

 branching, straight or irregularly dendroid, frequently 

 anastomosing ; one or more nuclei ; contractile vesicles 

 one or more. 



The genera included in the family Gromiina may be 

 divided into two groups ; one consisting of Leci/thiwm, 

 Pseudodifflugia, Diaphoropodon, Olypeolina, Frenzelina, 

 and Gromia, is intermediate in character between the 

 Euglyphina and the true Gromise in the other group. 

 These genera possess pseudopodia which are filose, 

 usually branching, but not anastomosing in a true 

 sense, although occasionally some of the filaments may 

 coalesce ; but the ectoplasm is of a comparatively firm 

 character and does not possess the digestive functions 

 which the reticulated pseudopodia of the Gromia} 

 proper are able to perform, an ability doubtless due to 

 the rapidly circulating currents which traverse the 

 pseudopodal reticulum in all directions. 



The Rhizopoda with reticulated pseudopodia differ 

 only from monothalamous Foraminifera in being 



