928 



ADDENDUM TO CLASS II 



of a termite (Procryptotermes sp.) from 

 Madagascar. 



3. Caryococcus dilatator Kirby, 1944. 

 (Univ. Calif. Publ. Zool., 49, 1944, 238.) 



di.la.ta'tor. L. p. adj. dilahis dilate; M.L. 

 noun dilatator the dilator. 



Spherules 0.5 micron or less in diameter. 

 Internally differentiated with a stainable 

 granule or stainable region peripherally 

 situated. Parasitic in nucleus and nucleolus. 

 The nucleus becomes greatly enlarged, and 

 the chromatin mostly or entirely disappears. 



Parasitic in the nucleus of flagellates 

 (Trichonympha chationi and other species of 

 T richonympha) from the intestine of a ter- 

 mite {Glypiotermes iridipennis) from Aus- 

 tralia; also found in other species of ter- 

 mites. 



4. Caryococcus invadens Kirby, 1944. 

 (Univ. Calif. Publ. Zool., 49, 1944, 238.) 



in.va'dens. L. p. adj. invadens invading. 



Spherules, 1.0 to 1.5 microns in diameter, 

 sometimes arranged in pairs. Often inter- 

 nally differentiated with stainable central 

 or peripheral granules or stained areas. 

 Parasitic in the nucleolus and nucleus. The 



parasitized nucleolus becomes greatly en- 

 larged and crossed by trabeculae, the nu- 

 cleolus eventually being consumed; the 

 nucleus becomes moderately enlarged, but 

 the chromatin does not disappear. 



Parasitic in the nucleus of a flagellate 

 {Trichonympha peplophora) from the intes- 

 tine of a termite (Neotermes howa) from 

 Madagascar. 



5. Caryococcus nucleophagus Kirby, 

 1944. (Univ. Calif. Publ. Zool., 49, 1944, 236.) 



nu.cle.o'pha.gus. L. noun nucleus a 

 small nut, a nucleus; Or. v. phagein to eat; 

 M.L. adj. nucleophagus nucleus-destroying. 



Spherules with a diameter of about 0.5 

 micron, sometimes arranged in pairs, some- 

 times with a thicker, crescentic, stainable 

 area of the periphery on one side. Parasitic 

 within the nucleus, lying exteriorly or in- 

 teriorly to the chromatin mass; the chro- 

 matin mass may be diminished in amount 

 but does not disappear; the parasitized 

 nucleus also is not appreciably enlarged. 



Parasitic in the nucleus of a flagellate 

 (Trichonympha corhula) from the intestines 

 of termites {Procryptotermes sp.) from 

 Madagascar and from three species of 

 Kalotermes from Madagascar. 



Genus B. Drepanospira de Petschenko, 1911. 



{Miillerina de Petschenko (not validly published; rejected by author), Cent. f. 



Bakt., I Abt., Orig., 56, 1910, 90; de Petschenko, Arch. f. Protistenk., 



22, 1911, 252; see Editorial Board, Internat. Bull, of Bact. 



Nomen. and Taxon., 2, 1952, 9.) 



Dre.pa.no'spi.ra. Gr. noun drepane a sickle; Gr. noun spira spiral; M.L. noun Drepano- 

 spira sickle spiral. 



Cells incurved in two spiral turns that are not abrupt, one of the ends being pointed, the 

 other a little rounded. No flagella; movement helicoid by means of all the body. No cell 

 division. So-called endospores are formed. Regular spherical colonies are formed by indi- 

 viduals at certain stages of development. 



The author regards this genus as belonging in the family Spirillaceae between Spiroso7na 

 {= Spirillum) and Microspira (= Vibrio). 



The type species is Drepanospira muelleri de Petschenko. 



1. Drepanospira muelleri de Pet- 

 schenko, 1911. {Miillerina paramecii de 

 Petschenko (name rejected by author). 

 Cent. f. Bakt., I Abt., Orig., 56, 1910, 90; 

 Drepanospira Miilleri (sic) de Petschenko, 

 Arch. f. Protistenk., 22, 1911, 252; also see 

 Kirby, in Calkins and Summers, Protozoa 

 in Biological Research, 1941, 1036; and Bu- 



chanan, Internat. Bull, of Bact. Nomen. 

 and Taxon.,;?, 1952,9.) 



mue'lle.ri. M.L. gen. noun muelleri of 

 Muller; named for J. Miiller, who studied 

 ciliates and who directed attention to these 

 parasites of Paramecium. 



Develop from a group of curved rods in 

 the cytoplasm to a large, ellipsoidal mass 



