INVERTEBRATA, CRYPTOGAMIA, MICROSCOPY, ETC 803 



(1) There are small ciliated infundibula, identical with those just 

 described, 



(2) The canaliculus from each infuudibulum has a more or less 

 tortuous direction. They are arranged in groups, and anastomose 

 with one another. 



(3) They give rise to a superficial plexus, whence two largo 

 trunks pass from behind forwards, on either side ; and these four 

 are connected anteriorly with ten largo longitudinal trunks. 



(4) Those last anastomose largely in the head, and during their 

 course communicate with one another by transverse branches ; they 

 open by ten orifices into a reservoir at the hinder end of the body. 



The ciliated infundibula have also been detected in the cysticerci 

 of Tcenia serrata, in the adult T. serrata, and in T. cucumerina, 



Tlie author refrains for the present from entering into any general 

 speculations, and contents himself with pointing out the bearings 

 which the facts he details have on the affinity between the Platyhel- 

 minthes, on the one hand, and the Rhyncoccela and Hirudinea on the 

 other. These worms may, he thinks, bo divided into the Coelomati 

 and the Acoelomati ; for the latter (the Trematoda and Cestoda) have 

 the coelom, in which the hajmolymph circulates, in a rudimentary 

 condition. 



Development of the Liver Fluke.* — M. Baillet shows that 

 segmentation may begin, and even be completed, while tlic egg is 

 unlaid, or the process may take place in the bile-ducts or gall-bladder 

 of the host. Further, the withdrawal of the eggs from the body 

 of the latter does not kill them, as is the case with the Nematode, 

 Sclerosiomum. Media seem, in fact, to be of little importance in this 

 matter, for presence or absence of light, immersion in common water, 

 in water containing organic matter in solution, in damp earth, alike 

 seem to influence neither the quickness nor perfection of the develop- 

 ment. 



Anatomy of the Nemertinea.f — Herr Dewolctzky has come to 

 the following conclusions, as he states in a preliminary account: — 



(1) The tegunieiitary epithelium contains other than the two 

 forms of cells already recognized ; there arc fihimentous supporting 

 cells, gland cells, both miicou.s and granular, as well as the terminal 

 cells of nerves, and cells which secrete pigments, or concretions of 

 definite f(u-m. 



(2) The ccsophftgcal epithelium is devoid of mucous cells ; tlio 

 supporting cells are shorter and more massive ; while the granular 

 cells are not deeply inlaid, and only communicate with the exterior 

 by fine efferent ducts. 



(3) In the sensory epithelium tliere appear to be no glands at 

 all ; while 



(4) In tlie epithelium whieh lines the canal of tlie lateral organ 

 the glands are confined to two points. 



♦ • Mc'in. Acad. Sci. Inscrip. ct ncllcs-Lettrcs,' Toulouse, 1879. Sec * Riv. 

 Bci. Nat.,' ii. (18H0) p. 114. 



t ' Zool. Anzeip.,' ill. (1880) p. ."iTi"). 



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