ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 187 



Superficial Secretion of Tapeworms. * — P. Mingazzini concludes, 

 after careful use of various histological methods, that the whole surface 

 of the body of an adult Cestode secretes a substance which has a notable 

 physico-chemical action on the intestinal contents of the host. What 

 has been so often described as a cuticle is a complex investment forme 1 

 by the intestinal juice, modified by the action of the secreted substance, 

 and intimately attached to a delicate chitinoid stratum, which is the true 

 cuticle of the tapeworm. 



New Species of Didymozoon. f — S. Kichiardi describes as D. 

 micropterygis sp. n. what seems to be a very distinctively new species of 

 this interesting genus of Trematodes. He found a large and a small 

 specimen beneath the skin in the interparietal region of Micropteryx 

 dumerilii Cuv. 



New Species of Distomum from the Duckmole. J — S. J. Johnston 

 describes as D. ornithorhynchi sp. n. a Trematode from the stomach, 

 duodenum, and anterior small intestine of Ornithorhynchus anatinm 

 Shaw. The simple nature of the intestine, the absence of hooks or lobes 

 from the oral sucker, the almost total obliteration of the oesophagus, 

 and the absence of a retractile telescopic tail-part, place the species in 

 Dujardin's sub-genus Brachylaimus, but it does not show a striking 

 likeness to any particular species. 



Structure of Lineus gesserensis.§ — E. C. Punnett gives a general 

 account of the anatomy, histology, and development of this worm, illus- 

 trated by some clear figures. The paper forms one of the Memoirs 

 published by the Liverpool Marine Biological Committee. 



Incertee Sedis. 



North Atlantic Brachiopods. || — H. Friele and J. A. Grieg include 

 Brachiopods in their report on North Atlantic Mollusca, and briefly 

 discuss eight species. 



New Species of Gastrotricha.^f — Max Voigt describes from the 

 lakes of Plon three new species of these forms, Ichthydium forcipatum 

 sp. n., Chsetonotus chuni sp. n., Dasydytes stylifer sp. n. The first-named 

 owes its name to the long forked tail, which resembles the forceps of the 

 earwig. The new species of Chsetonotus has its forked-tail distinctly 

 expanded, the edges of the expansion bearing two slight depressions. 

 The third form is characterised by the nature of the bristles in the 

 posterior region. 



Rotifera. 



New Rotifer.**— Max Voigt gives a short description of Coelopus 

 rousseleti sp. n., which he has found in the lakes near Plon, and which 



• Atti R. Accad. Lincei (Rend.), ccxcviii. (1901) pp. 307-14. 



t Atti Soo. Tosc. Sci. Nat., xiii. (1902) pp. 4-5. 



t Proc. Linn. Soc. N.S. Wales, xxvi. (1901) pp. 334-8 (1 pi.). 



§ Proc. and Trans. Liverpool Biol. Soc, xv. (1901) pp. 242-78 (4 pis.). 



|| Norske Nordhavs-Exped., xxviii. (1901) viii. and 131 pp., 2 figs, and a map. 



«[[ Zool. Anzeig., xxv. (1901) pp. 37-8. •• Tom. cit., pp. 38-9. 



