ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 599 



Remarkable Adaptation in Onychodactylus Acrobates. * — A. 

 Brodsky notes that this holotrichous Infusorian, which he has studied 

 on the shores of the Black Sea, attaches itself to seaweed by a long 

 resistant anchoring filament, which it secretes from its conical " foot." 

 Whenever this foot or appendix touches a solid body it fixes a filament, 

 and the Infusorian may ride like a ship at anchor. This is an interest- 

 ing adaptation to littoral life. 



Patagonian Protozoa.!— G. Entz, senior, reports on a collection of 

 fresh- water Protozoa (23 species) from Patagonia. Most of them are 

 represented in the European plankton, but the collection included 

 numerous specimens of Acineta tripharetrata sp. n. Of this and of Toco- 

 phrya cyelopum a detailed account is given. 



Tokophrya Cyclopum. +—B. Collin has studied the short-stalked 

 form of this Infusorian, which is common on the antenna? and appen- 

 dages of Cyclops. He notes that the canal of the contractile vacuole 

 opens into the base of an " embryonal cavity," much larger than the 

 "embryo." The latter fixes itself by the pole which is anterior in 

 swimming : this is the more pointed pole, furthest from the nucleus, 

 inclosing the basal secretion of the future stalk ; the other pole has a 

 rudimentary ad oral zone of cilia. The same phenomena were seen in 

 another Infusorian found on Cyclops, namely, Choanophrya infundi- 

 bulifera Hartog, which seems to be a Tokophrya. In unfavourable con- 

 ditions Tokophrya, becomes mobile, returning to an embryonic condition 

 or undergoing a sort of moult. 



Hgemogregaxine of the Eel.§ — C. France describes Emmoyreyarina 

 bettencourti sp. n. from the eel. It seems to be quite distinct from 

 E. liynieresi, which Laveran described in eels from near Buenos Ayres. 



Trypanosomes of the Frog.|| — C. Franca finds that the Inverte- 

 brate host of Trypanosoma costatum and T. rotator ium is a leech, 

 Helobdella dlgira, which also transmits T. mopinatum. 



Notes on Myxosporidia.^]" — L. Mercier has studied Boferellus cyprini 



in various stages which occur in the tubules of the carp's kiduey. He 

 finds a valve-nucleus in each of the two valves of the spore, and he 

 finds that the peculiar " yellow bodies " found in the kidney along with 

 Myxobolus cyprini, or in healthy fishes, are the residues of normal 

 phagocytosis. 



Parasite of Male Starfish. — Casimir Cepede** describes Orchitophrya 



stellarum g. et sp. n., an astomatous Infusorian which causes degenera- 

 tion of some of the cells of the testes of the common starfish (Asterias 

 rubens), causing partial parasitic castration. 



* Arch. Zool. Exper., viii. (1908) Notes et Kevue, No. 2, pp. li.-liii. (1 fig.), 

 t Math. Nat. Ber. Ungarn., xxi. (1907) pp. 84-112 (2 pis. and 7 figs.). 

 X Arch. Zool. Exper., viii. (1908) Notes et Revue, No. 2, pp. xxxiii.-xxxix. 

 (2 figs.). § Bull. Soc. Portugaise Sci. Nat., i. (1908) pp. 165-8. 



|| Tom. cit., pp. 169-70. 



^f Arch. Zool. Exper., viii. (1908) Notes et Revue, No. 2, pp. liii.-lxii. (5 figs.). 

 ** Comptes Reudus, cxlv. (1907) pp. 1305-6. 



