262 SUMMABY OF CUKEENT RESEARCHES RELATING TO 



single, long, coiled flagellum, and not a row of numerous cilia as pre- 

 viously supposed. The author considers the same arrangement 

 probably obtains in Ceratium, though he has not observed the 

 flagellum. 



A few notes are added concerning various Infusoria. In Spiro- 

 stomum teres (C. and L.) the author has observed conjugation to be 

 followed by transverse fission. In StichotricJia secun'Ja Perty, the 

 anus was discovered to be near the posterior extremity, and the 

 granular condition of the mucilaginous sheath is said to be caused by 

 the animal's excrement. Chilodon caudatus divides transversely ; 

 the lip is developed afterwards on the posterior half. 



He considers the form Laguncula piscatoris of Fisher to be a 

 species of Trachelomonas — T. piscatoris — the characters of which are, 

 Lorica cylindrical, covered with short spines ; anterior aperture 

 situate at the end of a long neck; frontal border denticulate, 

 bearing a row of small spines ; flagellum about twice as long as the 

 lorica. The author is unable to confirm Fisher's results as to the 

 separation of the spines from the lorica by the aid of potash, nor 

 as to the calcareous nature of the lorica by testing with hydrochloric 

 acid. 



New Infusoria.* — Dr. A. C. Stokes describes some new forms of 

 American fresh- water Infusoria, forming five new genera : — 



Clostonema, belonging to the family Spheno-monadid^e of Saville 

 Kent : the bodies are fusiform, naked ; persistent in shape, with two 

 unequal flagella ; pharyngeal passage, apparently communicating with 

 a contractile vesicle. Gyclanura is somewhat like Phacus, but without 

 the caudal prolongation. Diplomastax is holotrichous ; elongate ovate, 

 with tail-like prolongation ; oral aperture on ventral surface, 

 enclosing two vibratile membranes; it belongs to Kent's family 

 Ophryoglenida3. Histiohalantidium : heterotrichous ; setose hairs 

 abundant on the ovate body; mouth ventral and central, with a 

 vibratile membrane on its right border; it leads into a tubular 

 passage. The author places it between Saville Kent's SpirostomidaB 

 and Stein's BursaridsB. Balanitozoon : free-swimming form ; sub- 

 pyriform body ; long cilia anteriorly, none posteriorly ; oral aperture 

 apical ; pharynx present ; single long seta posteriorly. It connects 

 the Holotricha with the Peritricha. 



The following are new species : — Heteromita variabilis, Paramonas 

 alata, Clirysopyxis urceolaia, C. dispar, JJrotricha platysoma, Tillina 

 campyla, AmpJiileptus monilatus, LvxopTiyllum vorax, Colpidium putri 

 num, G. striatum, Bhabdostyla pusilla, Vorticella lemnae, Vaginicola 

 ampulla, Uroleptus sphagni. 



New Ciliated Infusorians-t — M. P. Fabre-Domergue gives a list 

 of Ciliated Infusorians found by him in the Bay of Concarneau. The 

 list includes two new genera and three new species. 



(a) On the outside of Asterias glacialis, especially on sickly speci- 

 mens with tegumentary excoriations, a parasitic infusor was found in 



* Ann. and Mag. Nat. Hist., xvii. (1886) pp. 98-111 (1 pi.). 



t Juuru. Anat. et Physiol. (Robiu), xxi. (1885) pp. 554-68 (2 pis.). 



