33 



axial filaments led to some interesting conckisions regarding the 

 comparative morphology of the two principal types of spicules, 

 monaxon and triradiate, occurring in calcareous sponges. 



Dr. T. A. Chapman, F.Z.S., F.E.S., read a paper pointing out 

 that Gyaniris Ghennellii of de Niceville was not a Cyaniris {Celas- 

 tr-ina Tutt), but belonged to a new genus near to Everes ; and 

 that a specimen in Col. Bingham's collection placed with chennellii 

 was a species almost entitled to be placed in Cyaniris^ for which 

 he proposed new generic and specific names. Another specimen 

 of the latter species was in the Tring Museum. It was suggested 

 that de Niceville had both these species together in dealing with 

 chennellii, and unfortunately selected as his type the one that was 

 not a Cyaniris. The two forms probably fly together and are 

 therefore mimetic. 



Mr. F. E. Beddakd, F.R.S., F.Z.S., gave an account of two 

 communications, entitled respectively, "A Contribution to Know- 

 ledge of the Batrachian Rhinoderma darivini " and " Some Notes 

 upon the Anatomy of Clivromys madagascariensis, with references 

 to other Lemurs." 



Miss Annie Porter, B.Sc, read a paper, communicated by 

 Mr. H. B. Fantham, F.Z.S., on " Leucocytozoon mioscioli, sp. n., a 

 Parasitic Protozoon from the Blood of "White Mice." The para- 

 sites occur in mononuclear and transitional leucocytes and free in 

 the plasma. The free trophozoites are gregariniform vermicules, 

 their average size being 10*9 p long by 5-1 jj. broad. Small free 

 forms enter leucocytes and grow partly at the expense of the 

 nucleus. A cytocyst is formed. The endoglobular parasites 

 average 8 /j, long by 5 ^ broad. Schizogony occurs in the bone 

 marrow. A schizont produces about twelve merozoites, each 4'4)u 

 by 0"8 fj,. Two parasites were sometimes seen in one host cell, 

 suggesting association, and in one case possible exchange of 

 chromatin occurred. Positive evidence of male and female forms 

 was not obtained. Vermicules were found in the gut and 

 Malpighian tubules of lice, ectoparasitic on the mice, but no sexual 

 cycle in the louse was observed. Perhaps the lice serve merely 

 as mechanical agents in the spread of infection. 



In a memoir from Mr. E. Meyrick, B.A., F.R.S., F.Z.S., 



entitled " Descriptions of African Micro-Lepidoptera," 108 species 

 and 11 genera of Tortricina and Tineina from the African Region 

 (especially the Transvaal) were described as new. 



Prof. A. Dendy, F.R.S., F.Z.S., communicated a paper by 

 Mr. A. G. Thacker, A.R.C.iS.{Lond.), on a collection of Calcareous 

 Sponges made by Mr. Cyril Crossland in the Cape Yerde Islands. 



