596 SUMMARY OF CURRENT RESEARCHES RELATING TO 



in Orlitolites, Peneroplis, &c. ; a megalospheric and a microspheric form 

 both occurring, the former with one and the latter with several nuclei. 

 The minute details of structure are described and figured, but it does 

 not appear that any very striking or novel points were made out. 



Nomenclature of Dimorphic Protozoa.*— Prof. A. Silvestri discusses 

 a question recently raised by E. van den Broeck t as to the most con- 

 venient way of naming dimorphic Foraminifera. The megalospheric 

 forms may be labelled A, and the microspheric forms B ; Nummulites 

 elegans Sowerby and N. planulata Lamarck are respectively the forms A 

 and B of the same species, and this should be registered as follows : — 

 Nummulites planulata Lamarck, N. planulata B Lamarck, N. planulata A 

 {elegans) Sowerby. Similarly, Frondicularia alata d'Orbigny is the form 

 B to which corresponds F. annularis the form A ; the B forms are most 

 important for determining the species, and the A forms for the genus ; 

 the registration, in this case, should be Frondicularia alata d'Orbigny, 

 Fr. alata B. d'Orbigny, Fr. alata A {annularis) d'Orbigny. 



Radiolaria.J— Mr. A. Earland publishes an interesting general paper 

 on this subject, which, without containing anything very novel, is worthy 

 of note as a useful summary of the present state of our knowledge of the 

 group. 



Flagellated Heliozoon.§— Mr. H. Crawley describes what he believes 

 to be specimens of Vampyrella lateritia, some of which were provided 

 with normal pseudopodia, while others bore flagella. 



Intranuclear Parasite of the Kidney of Rats. ||— Dr. E. Giglio-Tos 

 discovered in the renal epithelium of the sewer rat a parasite designated 

 Karyamosba renis sp. n. It is strictly confined to the nucleus, and is com- 

 posed of two parts, a central or nuclear and a peripheral or protoplasmic. 

 In size the parasite varies from 2 to 9 /a, and the numbers present vary 

 from 1 to 6. The sections were stained with Ziehl's phenol-fuchsin 

 diluted with 5 per cent, carbolic acid (10 ccm. sat. ale. sol. fuchsin to 

 490 5 per cent, carbolic acid). The nuclear portion of the parasite was 

 stained red, the peripheral was unstained. 



* Atti Accad. Pontif. Nuovi Lincei, liii. (1900) pp. 77-86. 



f Bull. Soc. Beige Geol., x. (1899); Ann. Soc. Malacol. Belg., xxxiv. (1S99> 



J Journ. Quekett Micr. Club, vii. (1900) pp. 257-84 (2 pis.). 



§ Araer. Nat., xxxiv. (1900) pp. 255-8 (2 figs.). 



II Atti R. Accad. Sci. Torino, xxxv. (1900) pp. 563-9 (1 pi.). 



* i < ^>-«- 



