

ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 355 



New Species of Cittotsenia from a Wallaby.* — R. C. Lewis 

 describes Cittotsenia lagorchestis sp. n. and C. villosa sp. n. from tbe 

 stomach and small intestine of Laijorchestes conspicillatus from Monte 

 Bello Islands. Both species are characterized by the presence of two 

 sets of genital organs and two lateral genital pores to each segment. 

 The first species is nearest C. zscholckei von Janicki, e.g. in having a 

 projecting sheath, which is fimbriated, at the posterior border of each 

 segment, overlapping the next segment. Bnt the two differ in their 

 reproductive and excretory systems. The second new species, G. villosa, 

 is marked by the extraordinary development of the fimbriations of the 

 projecting sheath at the posterior border of each proglottis, the presence 

 of two large testicular sacs instead of, as in other species, numerous 

 small testicular sacs, and by other features. 



Urocystidium.t — F. E. Beddard discusses the remarkable tapeworm 

 Urocystidium gemmipariim, which he found in sexual and asexual states 

 in cavities of the liver of the musquash {Fiber zibethicus). The asexual 

 stage is not referable exactly to any type of asexual tapeworm as yet 

 described. In spite of its external and internal (transverse water- 

 vascular vessels) segmentation, it is essentally a bladder worm, but, as it 

 appears, without a scolex. In complexity of structure and in details, 

 this asexual stage is not far different from the sexual stage. The sexual 

 worm which occurs in the same cavities of the liver is roughly of the 

 same size as the fully developed asexual stage. It has a strongly 

 muscular rostellum, two rows of hooks, large oval calcareous bodies, 

 gonads about the centre of the proglottides, and the ducts all to one 

 side. 



It is suggested that from the egg there arises a plerocercoid larva ; 

 that this gives rise by budding to many larvae which differ in several 

 structural features from the asexual parent, and that these, perhaps, give 

 rise to the sexual worm. 



Viviparous Distome.J — Edwin Linton describes Parorchis avitus 

 sp. n. from the cloaca of a herring gull (Larus argentatus), unique in 

 having miracidia in the uterus, and a well-developed redia within each. 

 Miracidia in the ova of Distomes have been recorded, and larva? contain- 

 ing rediae have been noted in certain Monostoniidge ; but this seems to 

 be the first record of a Distome whose uterus showed ova with ciliated 

 larvae containing' redias. 



*& 



New Trematodes.§ — W. Nicoll describes a number of new parasites 

 from animals dying in the Zoological Society's Gardens in London. 

 The list of new forms includes Mediorima propria g. et sp. n. (from the 

 intestine of a striped snake, Tropidonotus ordinatus), closely resembling 

 Lechriorchis but distinguished from it by the median position of the 

 genital aperture and the shape of the cirrus-pouch ; Ommatobrephus 

 singular is g. et sp. n. (from the intestine of the spiny-tailed mastigure, 



* Proc. Zool. Soc, 1914, pp. 419-33 (10 pis. and 3 figs.), 

 t Proc. Zool. Soc, 1914, pp. 1-22 (9 figs.). 

 X Proc. U.S. Nat. Museum, xlvi. (1913) pp. 551-5 (1 pi.). 

 § Proc. Zool. Soc, 1914, pp. 139-54 (3 pis.). 



