ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 49 



dividuals that have conjugated become more alike in their average 

 length, so that by-parental inheritance occurs in respect to body size (as 

 well as in respect to rate of fission). The members of pairs in the 

 culture examined showed, owing to assortative mating, a coefficient of 

 correlation in body length of 0*3881 : this was increased as a result of 

 conjugation to snch an extent that their progeny showed a coefficient 

 of U'5744 — an increase of 48 p.c. 



Remarkable Protistan Parasite.* — H. M. Woodcock and G-. Lapage 

 describe a new type, Solenomastix ruminantium (Certes), which occurs 

 in the rumen of the goat in two forms, crescents and ovals. The 

 crescents present a homogeneous non-granular appearance, with a defi- 

 nite envelope, with a single large flagellum arising from the concavity of 

 the crescent. They may move by the flagellum or by the body alone. 

 There is no proper nucleus, the chromatin being present in the form of 

 a peripheral layer of granules, or there may be one or two large masses 

 projecting into the cytoplasm. Division is by equal binary fission 

 transverse to the long axis. 



The ovals resemble the crescents in general, but have no flagellum, 

 although capable of active movement. The chromatinic substance may 

 be in a narrow peripheral layer with or without granules. In others 

 there is a lighter central zone and a darker peripheral zone, perhaps 

 chromatinic. Perhaps the second type of oval gives rise to the first, 

 and perhaps the crescent may become an oval of the first type. 



The new type is not a Dinoflagellate, nor a Schizosaccharomycete, 

 nor a Spirochete. It may be regarded as a Proflagellate. 



Urceolaria synaptse.f— N. L. Cosmovici has studied this Infusorian 

 from the intestine of Synaptids. There is a crown of cilia in the 

 interior of the urn (the " Kranz " cirri of others). The foot of the 

 urn is lined with active vibratile cilia (the " batonoi'des " elements of 

 Schneider). The micronucleus appears in the resting-stage like a 

 homogeneous mass, lodged in an excavation of the aboral end of the 

 macronucleus. The cilia of the peristomial ring are usually immobile, 

 but they move when the animal is at rest. There is conjugation and 

 fission. The marine habitat, the presence of cilia at the foot of the 

 urn, and the simple triangular form of the vestibule (cytopharynx) 

 lead the author to regard Urceolaria as a primitive member of the 

 Urceolarinae. 



New Chytridiopsid.^ — G. Tregouboff describes Chytridioides schizo- 

 phylli g. et sp. n. from the intestine of a millipede (Schizophyllum 

 meiliterraneum) common at Banyuls-sur-mer. It presents a considerable 

 resemblance to Clujtriopsis socius of Blaps. But in its mode of sporu- 

 lation with transient partitioning of the contents of the cyst and in its 

 amoeboid schizozoites it approaches the Chytridineas. 



* Quart. Journ. Micr. Sci., lix. (1913) pp. 431-57 (2 pis. and 2 figs.). 



t Bull. Soc. Zool. France, xxxviii. (1013) p. 233. 



X Arch. Zool. Exper., lii. (1013) Notes et Revue, No. 2, pp. 25-31 (2 figs.). 



Feb. 18th, 1914 E 



