42 SUMMARY OF CURRENT RESEARCHES RELATING TO 



the ventral side of the 9th abdominal segment; the copulatory ap-. 

 paratus is on the ventral side of the 2nd and 3rd segments ; previous 

 to copulation the abdomen is bent so that the vesicle at the front of the 

 3rd abdominal sternum is charged ; the female is swung round so that 

 her genital orifice is brought into contact with the accessory apparatus 

 on the 2nd abdominal segment. A very careful account of the complex 

 parts in their various stages of differentiation is given. 



Arborescent Glands of Female Cockroach.*— L. Bordas describes 

 these organs, first noted by Siebold and Dufour, which surround the 

 rectum and the terminal portion of the hind-gut, and extend even to the 

 oviducts and ovarioles. There are two of them, the left much larger 

 than the right, and they have two apertures on the dorsal wall of the 

 vaginal cavity. The left arborescent gland secretes crystals of carbonate 

 of lime, very abundant at the time of oviposition, which serves to build 

 up the ootheca or ovigerous shell. 



Kidneys of Thysanura.f — L. Bruntz finds two kidneys in Thysanura, 

 consisting of a labyrinth and a saccule, with excretory canals opening 

 together at the base of the lower lip. The saccules eliminate ammo- 

 niacal carmine, and the labyrinths carminate of indigo. 



Machilida? and Lepismida3 have two pairs of cephalic glands, an 

 anterior pair opening at the base of the masticatory cavity, and a 

 posterior pair annexed to the excretory canals of the kidneys. Both 

 pairs are mucous glands, the anterior pair may be called masticatory 

 glands, the posterior pair may secrete a fluid which bears away the 

 excretory products. 



Antarctic Aptera.| — G. H. Carpenter describes a new Podurid 

 from South Victoria Land, Gompluocephalus hodgsoni g. et sp. n. It 

 seems to be a Podurid with affinities to the Entomobryida?, just as 

 the AnurophorinEe— which include that remarkable antarctic genus 

 C'rytopygus (Willem, 1902)— are Entomobryids, with affinities to the 

 Podurida?. The presence of such ancient connecting links on the 

 antarctic continent and islands might reasonably have been expected . 



fi, Myriopoda. 



Dimorphic Spermatogenesis in ScutigeraJ— P. Ancel and P. Bouin 

 note that two kinds of spermatozoa have been observed in Paludina, 

 Mure®, Scolopendra, Pygmra, etc., but they have observed in Scuiigera cole- 

 opt rata two distinct spermatogenetic lineages, distinct from start to finish, 

 resulting in giant spermatozoa rich in chromatin, and dwarf spermatozoa 

 poor in chromatin. 



5. Araclinida. 



Stridulating Organs in Mygalomorph Spiders. || — A. S. Hirst 

 describes some new types of apparatus, which are situated on the inner 



* C.R Soc. Biol. Paris, lxv. (1908) pp. 533-5. 



t Arch. Zool. Expe'r., ix. (1908) pp. 195-238 (3 pis). 



X Nat. Antarctic Exped. (Zool.) iv. (1908) 5 pp. (1 pi.). 



§ C.R. Soc. Biol. Paris, lxv (1908) pp. 287-9. 



|| Ann. Nat. Hist., ii. (1908) pp. 401-5 (5 figs.). 



