ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 617 



female. They are furnished with nerve-cells, and are probably also 

 tactile. (/*) The female reproductive organs are very well developed. 

 The long ovaries, extending from the pharynx nearly to the hind end 

 of the body, function posteriorly as oviducts, whence the eggs pass 

 through a peculiar muscular collar into the vagina, which s also 

 furnished with delicate muscles. The young ova become fixed by a 

 fine filament (rachis) to a sort of funiculus in the centre of the tube, 

 they liberate themselves from" the parietes, lose their rachis, and in 

 the posterior portion of the ovary acquire their chitinous envelope. 



Notes on Entozoa.* — M. E. Blanchard reminds us that cysts of 

 Tsenia echinococcus are not rarely found in the horse, though they are 

 not reported by Dr. Linstow as occurring in that animal. Amphistoma 

 conicum, which is known to occur in cows of Europe and Australia, is 

 now reported from Formosa. Anhylostoma bose is a new species from 

 the intestine of a Boa constrictor ; this is almost the first notice of a 

 nematoid of this genus in an Ophidian, most of them living in warm- 

 blooded animals. Rictularia bouvieri is a new species found in the 

 intestine of Vespertilio murinns, but is described from a single (female) 

 specimen ; this is a very rare generic type, but there is in Dr. Dohrn 

 a sixth observer, not noticed by M. Blanchard, nor is his species 

 (.B. macdonaldi), from a West African bat, mentioned by the author 

 in his synopsis or synonymy. 



Anatomy of Taenia lineata.j — Dr. 0. Hamann gives a detailed 

 account of this parasite of the dog ; the ripe proglottis is remarkable 

 for containing a rounded body, from which a much-coiled tube is 

 given off; the body has a reddish colour, and, with the tube, is filled 

 with embryos. After the joints have been deposited for two or three 

 days the embryos are found in the spherical body only. 



The musculature is of a somewhat abnormal type, and may bo 

 arranged in two groups; in one we have the fibres in which the 

 formative cells are retained, and in the other no remnants of these 

 cells at all. In the first group wo find the circular layer and the 

 dorso-ventral muscles; on each fibre of the latter there is a large 

 peripheral cell, which seen from the surface is oval or spindle-shaped 

 in form ; when seen from the side the connection between the cell 

 and the fibre can be made out. In the second group are the fibres 

 which lie parallel to the long axis of the proglottis, the subcuticular 

 longitudinal muscles, and the layer which surrounds the centrally 

 placed organs. The characters of the longitudinal trunks of the 

 water-vascular system vary considerably in different proglottids ; the 

 trunks are lined by a fine hyaline membrane, secreted by flattened 

 epithelial cells ; from the trunks there are given off fine canals, which 

 can be followed for some distance ; they, terminate in a fuunel-shaped 

 widened end ; the course of the fine vessels is exceedingly irregular, 

 they are much coiled and often branch ; each lateral twig ends in a 

 funnel; they are transparent tubules of 0*00142 mm. diameter; 



* Bull. Soc. Zool. France, xi. (1886) pp. 294-304 (1 pi.), 

 t Zeitschr. f. Wiss. Zool., xlii. (1885) pp. 718-44 (2 pis.). 



