SPIROTRICHA, HYPOTRICHA 845 



E. cionaecola C. and S. (Fig. 359, d). 60-70 m by 45-55m; in the 

 branchial cavity of the ascidian, Ciona intestinalis. 



Family 4 Aspidiscidae Claus 



Genus Aspidisca Ehrenberg. Small; ovoid; inflexible; right and 

 dorsal side convex, ventral side flattened; dorsal surface conspicu- 

 ously ridged ; ado ral zone reduced or rudimentary ; 7 frontal-ventrals; 

 5-12 anals; macronucleus horseshoe-shaped or occasionally in 2 

 rounded parts; contractile vacuole posterior; fresh or salt water. 

 Numerous species. 



A. lynceus E. (Figs. 55; 358, h). 30-50/x long; fresh water. Division 

 and reorganization (Summers, 1935). 



A. polystyla Stein (Fig. 358, i). About 50/x long; marine; Woods 

 Hole (Calkins). 



References 



Bullington, W. E. : (1940) Some ciliates from Tortugas. Carnegie 



Inst. Wash. Publ. no. 517. 

 Calkins, G. N.: (1902) Marine Protozoa from Woods Hole. Bull. 



U. S. Fish Comm, 21:415. 



— (1930) Uroleptus halseyi. II. Arch. Protist., 69:151. 



Chatton, E. and Segtjela, Josephine: (1936) Un hypotriche de la 



branchie de Ciona intestinalis, etc. Bull. soc. zool. France, 61 : 



232. 

 Froud, Joan: (1949) Observations on hypotrichous ciliates: the 



genera Stichotricha and Chaetospira. Quart. J. Micr. Sc, 90: 



141. 

 Gaw, H. Z. : (1939) Euplotes woodruffi sp. n. Arch. Protist., 93 : 1. 

 Hall, R. P.: (1931) Vacuome and Golgi apparatus in the ciliate, 



Stylonychia. Ztschr. Zellforsch. mikr. Anat., 13:770. 

 Hammond, D. M.: (1937) The neuromotor system of Euplotes pa- 

 tella during binary fission and conjugation. Quart. J. Micr. Sc, 



79:507. 

 and Kofoid, C. A.: (1937) The continuity of structure and 



function in the neuromotor system of Euplotes patella, etc. Proc. 



Am. Philos. Soc, 77:207. 

 Horvath, J. v.: (1933) Beitrage zur hypotrichen Fauna der Um- 



gebung von Szeged. I. Arch. Protist., 80:281. 

 Kent, S.: (1881-1882) A manual of Infusoria. London. 

 Lepsi, J.: (1928) Un nouveau protozoaire marine: Gastrocirrhus in- 



termedius. Ann. Protistologie, 1 : 195. 

 Lund, E. E.: (1935) The neuromotor system of Oxytricha. J. 



Morphol., 58:257. 

 Manwell, R. D.: (1928) Conjugation, division and encystment in 



Pleurotricha lanceolata. Biol. Bull., 54:417. 

 Merriman, D.: (1937) Description of Urostyla poly micr onucleata. 



Arch. Protist., 88:427. 



