ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 525 



In the formation of the oogonia there is a fatty degeneration of the 

 rachis and the pedicel which unites it to the germ-cells. Part of this 

 fat is incorporated in the oogonia. In the oocytes of the first order 

 mnch of the fat disappears and al)undant glycogen appears. After 

 fertilization a large proportion of the glycogen is transformed and the 

 resulting glucose is changed into glycosamine in the external membrane 

 of the egg. Some of the fat reappears. The development cannot 

 proceed except in the presence of oxygen, and the segmentation is 

 associated with a combustion of the carbohydrate and fatty reserves. 



Trichosomum of Turkey.* — C. Barile describes both sexes of a new- 

 species of Trichosomum, a delicate hair-like Nematode, causing fatal 

 lesions in the intestine of the turkey. 



Uterus of Nematodes. f — L. G. Seurat describes the minute structure 

 of the terminal part of the uterus in Hahronema muscse, Spiroptera micro- 

 stoma, and Spirura taJpse. The terminal part is adapted for the expul- 

 sion of the ova, forming what Looss has called the " ovijector." In 

 Strongylidae it is paired ; in the forms mentioned above it is unpaired ; 

 it is similar in nearly related forms. 



Mermithidifi.J — A. Hagmeier describes a number of new species of 

 Mermis and Parnmermis, and revises the family. Diagnostic characters 

 are found particularly in the variety of structure exhibited by the sensory 

 organs at the head end and in the arrangement of papillae at the pos- 

 terior end of the males. The lateral organs of the head are invaginations 

 of the skin, forming goblets with often very narrow openings, containing 

 a fluid secretion produced by a singleposterior gland-cell, and innervated 

 by the lateral cephalic nerves. They are probably organs of chemical 

 sense. 



Microfilariae of the Guinea Coast. § — G. Pittaluga deals with the 

 minute structure of the embryos of some tropical Microfilariae, such as 

 Filaria loa. He also discusses the difficult question of diagnostic 

 characters and the pathogenic role of various species. 



Platyhelminthes. 



Structure of Taenia gigantea (Peters).|| — G. A. and W. G. 

 McCallum have studied an enormous tapeworm — a length of about 

 20 ft. was found — discharged from a Javanese rhinoceros. It is referred 

 to the species Tsenia giyantea (Peters). The study of sections reveals 

 no marked peculiarity. It seems that after fertillization the vagina 

 becomes obliterated towards the distal portion of its course — a local 

 atresia sometimes leaving the extreme distal portion open to the outside 



* Bull. Sou. Zool. France, xxxvii. (1912) pp. 126-33 (3 figs.). 



t C.R. Soc. Biol. Paris, Ixxii. (1912) pp. 778-81 (4 figs.). 



% Zool. Jahrb., xxxii. (1912) pp. 521-612 (5 pis. and 7 figs.). ^ 



§ Bol. Inst. Nacional Higiene Madrid, viii. (1912) pp. 77-92 (8 pis.). 



II Zool. Jahrb., xxxii. (1912) pp. 379-88 (4 figs.). 



