ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 759 



giving the body a punctate appearance. Longer cilia surround the 

 mouth. The sarcode is transparent, and, apart from a few greenish 

 food-balls, contained only a large number (over a dozen) of oval 

 bodies of a similar character (endoplastules in an unobserved coiled 

 endoplast?). The motions of the animal are very quick, and are 

 occasioned chiefly by the whip-like motions of the proboscis, which 

 is extremely vigorous in movement, and alters its form greatly. 

 Apart from this rapid motion, it can propel itself slowly by means 

 of the cilia covering the entire surface. It is the type of a new 

 genus, and is named Phragelliorhynchus nasuius. 



Parasitic Peridinian.* — G. Pouchet has met with a Peridinian 

 which in its early stage is parasitic on AppendicularicB. These 

 parasites are pear-shaped, about 170 to 180 /x, long, with a nucleus 

 large in proj)ortion. In colour they are a deep brown ; they are 

 enveloped in a thin cuticle which they keep on becoming free, whilst 

 they abandon their pedicel. These detached individuals float in great 

 abundance on the surface of the sea and there undergo free or 

 independent segmentation, subdividing after the manner of a fecundated 

 vitellus into uninucleated spheres dwindling in size and growing 

 paler in colour as the process continues ; but the products of this 

 segmentation always remain independent. A very thin cuticle is 

 thrown off" as they divide. The spheres finally resulting, measuring 

 no more than 10-13 /x, develope a longflagellum and a crown »f cilia, 

 and become minute Peridinians allied to Pulvisculus of Ehrenberg 

 {Gymnodinium pulvisculus of Bergh). The whole process occupies 

 about 24 hours. 



Observations on Flagellata.t — F. Blochmann commences with 

 some notes on Trichomonas vaginalis, at the anterior end of which 

 there are three flagella, from the base of which an undulating mem- 

 brane extends to about the middle of the body ; this membrane, never 

 hitherto observed, may be best seen if the creature is allowed to die 

 gradually. The T. hatracliorum of Perty (the Cimcenomonas batrachoriim 

 of Grassij is next considered, and here also an undulating membrane 

 was detected. If the monad is allowed to remain for some time under 

 the pressure of the cover-glass the whole margin of the animal is 

 seen to exhibit an active undulatory movement, thougli, of course, 

 this is not so regular as that of the membrane. A similar phenomenon 

 is to be observed in Trichomastix lacertce, a species lately detected by 

 Biitschli in the cloaca of Lacerta agilis ; it has four flagella, one of 

 which is half as long again as the animal and is directed backwards. 

 Oxyrrhis marina is the last form described ; within their bodies a 

 large number of fat-drops, often of considerable size, are to be 

 detected ; they take in solid nutriment. The author was able to 

 observe their multiplication by a mode of transverse division. 



Geometry of Radiolari'-i.J — Prof. E. Hiickel points out that the 

 four orders of the Kadiolaria are distinguished by their geometric 



• Comptes Rendus, xcviii. (1884) pp. 1345-6. 



t Zeitaclir. f. Wi.-^s. Zool., xl. (1884) pp. 42-9 (1 pi.). 



+ SB. .Jenai.sch. GeB«ll. f. Mod. u. Niiturwiss., 18S.^ (1881) pp. 104-8. 



