ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 229- 



Protozoa, 



Studies of Protists.* — G. Tiegoudoff has studied at Villefranche 

 a new moQthless ciliate, Perezella pneiimodermopsidis sp. n,, a parasite 

 in the general cavity of Pneumodermopsis ciliatum, a gymnosomatous 

 Pteropod. The cilia are in fourteen rows, each arising from a basilar 

 corpuscle ; the contractile vacuole is always posterior ; the macro- 

 nucleus divides by constriction"; the micronucleus divides into two parts 

 connected for some time by a long band. The author discusses the 

 Acinetarian Trichophrya salparum Entz ; a new species, T. morchellii, 

 from Morcliellium ; and a new sub-species, T. salparum, pyrosomse from 

 Pyrosoma. In a species of Porospora from Pisa gibsi, almost 1 mm. in 

 length, solitary encystation was observed, and also a peculiar conjuga- 

 tion preceding encystation. One of the conjugates fixes its anterior end, 

 into the body of the other, which is more passive. 



Infusorians of Lake Geneva. f — Emile Andre has been able to add 

 thirty-three species to the known list of 111 species of Infusorians from 

 this lake. Four of the thirty-three are new records for Switzerland, and 

 three, are new to science — viz. Holophrya haplostoma sp.n., marked, like 

 H. ovum, by a very simple mouth ; Nassula versicolor sp. n., with diverse 

 coloration due to pigment, chloreUae, and food particles ; and Prosop- 

 senus sinuatus g. et sp. n., in the family Oxytrichinse and sub-family 

 Psilotrichinas. In the last form the cirri are all in the posterior half 

 except four on the frontal region, and the peristome extends for three- 

 quarters of the length of the animal. 



New Genus of Coccidia.| — L. Leger and 0. Duboscq describe Pseudo- 

 Idossia glomerata g. et sp. n., from the kidneys of the bivalve Tapes. 

 They occur as intracellular parasites, and cause hypertrophy of the nucleus 

 of the cell. When the infestation is intense there may be five to 

 ten coccidia pressed together, as the specific name glomerata suggests. 

 Gamogony occurs, and the development of microgamete and macro- 

 gamete is described in detail. Schizogony was not seen with certainty. 

 The nearest relationships of the new genus seems to be with AggregatUy 

 from Cephalopods, and with Angeiocystis and Caryotropha from Annelids. 



Studies on Gregarines.§— Minnie Elizabeth Watson describes 

 twenty-one new species of Gregarines, gives a synopsis of the 

 Eugregarine records from the Myriopods, Coleoptera, and Orthoptera 

 of the world, discusses the structure of typical Stenophoridge and 

 Gregarinidaa, and deals with various questions relating to the life of 

 these parasites. 



Gregarines infect only Invertebrates. The only Invertebrates from 

 which they have not been recorded are Protoza, Porifera, and Eotifera. 

 The mid-intestine is the chief area of infection with the sporonts, which 



* Arch. Zool. Exp6r., Iv. (1916) Notes et Kevue, No. 3, pp. 35-47 (4 figs.), 



t Rev. Suisse Zool., xxiv. (191(5) pp. 621-34 (1 pL). 



: Arch. Zool. Exp6r., Iv. (1915) Notes et Revue, No. 1, pp. 7-16 (4 figs.}. 



§ Illinois Biol. Monographs, ii. (1916) pp. 1-258 (15 pis.). 



