730 SUMMARY OF CURRENT RESEARCHES RELATING TO 



reserve-material, in Pterocephalus nolilis, parasitic in Scolopendra ciii- 

 qulata Latr. The process of amphimixis is closely similar to that in 

 Metazoa, the division of the zygote is comparable to segmentation in 

 some Metazoa, and the distinction between the male and female parents 

 is well-marked. 



New Parasite of Hermit-Crabs.*— L. Leger and 0. Duboscq de- 

 scribe Aggregata vagans sp. n., a polycystidean, gymnosporous Gregarine, 

 parasitic in or on the alimentary tract, or in the parivisceral cavity of 

 Eupagurus prideauxi. It is closely allied to Aggregata ccclomica Leger 

 from Pinnotheres pisum. 



Phototaxis in Volvox.t — S. J. Holmes maintains that the larger 

 size of the red pigment-spots at the anterior pole of the Volvox colony 

 is of importance in relation to phototactic movements. But it does not 

 appear that he has sufficiently separated in his experiments the direction 

 of the illumination from the intensity thereof. 



Progress in Study of Coccidia.J— M. Liihe has done a useful and 

 laborious piece of work in summing up with bibliographical details what 

 has been done in regard to Coccidia in the last four years. After dis- 

 cussing the classification and the new forms, he devotes the bulk of his 

 account to the studies on the life-history of Eimeria, Isospora, Cyrfospora 

 caryolytka Schaud., Adelea, Klossia, Leger etta, Eucoccidium, Garyotropha 

 mesnill Siedl., Klossiella muris Smith and Johnson. The last section of 

 the paper deals with the pathology of Coccidial infection. 



* Arch. Zool. Expe'r. I. series 4 (1903). Notes et Kevue, No. d, pp. cxlvii.-li. 

 (6 fiss.). 



t Biol. Bull., iv. (1903) pp. 319-20. See Zool. Centralbl. x. (1903) 592-3. 

 J Zool. Centralbl. x.(1903) pp. G17-G1. 



