ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 633 



the apparently anomalous manner of division in the Vorticellinte. The 

 author gives an account of his observations on division, and con- 

 cludes with some notes on Lagenophrys, in which Stein reported that 

 fission was in an oblique direction. Prof. Biitschli suggests that this 

 appearance is due to the abnormal course taken by the adoral spiral. 



Species of Chromulina as Stages of Palmella.*— Herr N. Wille 

 describes the life-history of Chrysopyxis which, when it begins its 

 spring vegetation, leaves the thick membrane which invests the 

 encysted cell, and multiplies by transverse division within a mucous 

 covering ; while the cells are still within this coat the cilia may be 

 seen to be moving ; at the anterior end of the body there is a con- 

 tractile vacuole. A species of Chromophyton is next described, which 

 has oviform swarm-spores, and appears to develope into an Epipyxis ; 

 they may be easily distinguished from Chrysopyxis by having their 

 contractile vacuole in the centre of the cell. The mode of develop- 

 ment of these two forms is so similar to that of a Dinobryon that the 

 author thinks they must be placed in the same family ; and he is 

 further of opinion that the swarm-spores of Chrysopyxis are identical 

 with the round form of Chromophyton Rosanoffii and Monas ochracea, 

 and that those of Dinobryon (Epipyxis) are the same as the oviform 

 stages of C. Bosanoffii and Monas flavicans ; their reported presence 

 in the same waters justifies this view. 



Microscopic Pelagic Animals of the Mediterranean.! — Dr. 0. E. 

 Imhof describes a new species of Cyttarocylis — C. adriatica — the test 

 of which has the form of a stalked cup, the stalk, however, not serving 

 as part of the habitation. A species of Codonella was found near 

 Brindisi which resembles C. acuminata of the Lake of Como, but 

 differs in size — the whole length was ■ 176 mm. 



New Fresh-water Infusoria.^ — Dr. A. C. Stokes adds several 

 new species to his former contributions. 



Physomonas elongata differs from previous species in the absence 

 of the subspherical outline usually considered characteristic of the 

 genus. A pedicle is formed temporarily, though the animal is 

 usually free-swimming. Beproduction takes place by longitudinal 

 fission. 



Tetramitus variabilis is noticeable for the entire absence of the 

 longitudinal grooves found in the other species. Urceolus subulosus 

 has a cuticular investment of sand, which is apparently unique 

 among Infusorians. This obscures the internal structure. 



Chrysopyxis triangularis, C. macrotrachela, and C. ampullacea have 

 forms signified by the names given to them. Prorodon limnetis differs 

 from P. teres, which it most nearly approaches, in the excentric 

 position of the mouth, and the well-marked anterolateral curvature. 



Trachelophyllum clavatum is the only species which possesses a 

 single nucleus. 



* Bot. Centralbl , xxiii. (1885) pp. 258-63. 



t Zool. Auzeig., ix. (1886) pp. 198-200. 



X Amer. Moil. Micr. Joura., vii. (1886) pp. 81-6 (18 figs.). 



