GENUS PSETJDODIFFLUGIA. 197 



and sphagnous swamp of Atco, New Jersey, I found several individuals 

 of a species of Pamphagus, larger and apparently different from any of the 

 preceding. Its size accords with that given for 'Corycie' by Dujardin, and 

 perhaps the animal may be the same. 



One of the individuals observed, represented in fig. 10, pi. XXXIII, 

 was so replete with food as greatly to obscure from view the nucleus and 

 other usual constituents of the sarcode. Among the food contents were two 

 considerable portions of the alga Didymoprium, which were so long as to 

 cause some distortion of the animal, making it project beyond the normal 

 outline both in front and behind. Among the contents of the sarcode, 

 besides the ordinary pale granular basis and fine oil-like molecules, there 

 were noticed many clear globules or water vacuoles. 



The pseudopods were like those of P. mutahilis. In the distorted con- 

 dition of the animal, as represented in the figure, the creature measured 

 0.22 mm. in length by 0.12 mm. in breadth. The longest pseudopod 

 measured 0.2 mm. in breadth. The following morning, after first seeing the 

 specimen, it had discharged the two long portions of Didymoprium, and in 

 this condition presented a cordiform outline, with the mouth depressed and 

 puckered, and it measured 0.16 mm. in length by 0.1 12 mm. in breadth. 



Another individual, of ovoid form, had the mouth in the centre of the 

 broader pole. It was 0.148 mm. long by 0.12 mm. broad. It contained 

 many clear globules or water vacuoles from 0.004 mm. to 0.008 mm., 

 together with oil-like globules up to 0.01 mm. in diameter. The abundant 

 food consisted of indistinct yellowish granular material and a number of 

 round, one-celled, bright green algae. A clear nucleus in the fundus of the 

 sarcode measured 028 mm. in diameter. 



This large form of Pamphagus may perhaps be the same animal as 

 the Plagiophrys cylindrka of Claparede and Lachmann, which approximates 

 it in size. 



PSETJDODIFFLUGIA. 



Greek, pseudos, false; Latiu, diffluo, to flow. 

 Pseiidodifflugia : Schlumberger, 1845. Pleurophrys: Claparede and Lachmann, 1859. 



Animal provided with a thin chitinoid shell mostly incorporated with 

 variable proportions of fine quartz-sand, or other extrinsic material, of inde- 

 terminate character, commonly distinguished as 'dirt.' Mouth terminal, 



