GENUS HETEROPHRYS— HETEROPHRYS MYRIAPODA. 243 



HETEROPHRYS MYRIAPODA. 



Heterophrys myriapoda. Archer: Quart. Jour. Mic Sc. 1869, 267, pi. xvii, fig. 4; Ibid. 1870, 110.— Greeff, 



Arch. mik. Anat. 1875, xi, 21, Taf. i, Fig. 8, 9 T. 

 t Heterophrys rarians. Schulze : Arch. mik. Anat. 1874, x, 386, Taf. xxvi, Fig. 2-5. 

 t Heterophrys variabilis. Greeff: Arch. mik. Anat. 1875, xi,28, Taf. ii, Fig. 20-23. 



Body composed of a soft, usually spherical, granular mass of proto- 

 plasm, colorless at the surface, and commonly bright green in the interior, 

 due to the presence of variable proportions of chlorophyl corpuscles, or in 

 some conditions with little or no color independently of that produced by 

 food ; also containing clear colorless corpuscles, vacuoles, nuclei, and one or 

 more contractile vesicles. With or without an exterior envelope of clear, 

 colorless protoplasm defined at the surface by granules or cil-like villi. 

 Pseudopods as simple granular rays. 



Size. — Diameter ^ b th to ^th of an inch (Archer). 



Locality. — Ireland (Archer) ; Germany (Schulze, Greeff). 



The genus Heterophrys, established by Mr. Aixher, consists of Actino- 

 phrys-like animals, the body of which usually contains colored corpuscles, 

 and is invested with a layer of protoplasm defined by a ciliated or granu- 

 lated surface, and penetrated by the pseudopodal rays. 



To the genus Mr. Archer refers a creature of gregarious habit, previ- 

 ously described by Focke (Zeitschrift fur wissenschaftliche Zoologie, 1868, 

 5553, Taf. xxv, Fig. 1), and gives it the name of Heterophrys Fockii. This I 

 am disposed to view as pertaining to Baphidiophrys elegans, hereafter to 

 be described. 



Heterophrys niyriapoda, as described by Mr. Archer, is a beautiful, 

 bright green, Actinophrys-like animalcule, having the body enveloped in a 

 thick laver of granular protoplasm defined by a villous surface and pene- 

 trated by numerous simple rays like those of the common Sun -animalcule. 



Professor Schulze has described a colorless heliozoan, which he attri- 

 butes to the same genus under the name of Heterophrys varians. He indi- 

 cates two conditions of the animal : one in which the body is surrounded 

 by a clear protoplasmic layer defined by a granular surface ; the other in 

 which this layer is absent. The interior contained from three to half a dozen 

 nuclei and a variable number of contractile vesicles. The size of the body 

 was about 0.06 mm. 



