ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 907 



the membrane divides to form the fringes, the thick edge then going 

 into the thickened extremities of the adoral comb. In two hours, 

 more or less, the sweet-water Lemhus is a sweet-water Ctedodema." 



New Fresh-water Infusoria.'— Dr. A. C. Stokes also describes 

 and figures some new genera and species of fresh-water Infusoria. 



Loxodes vorax n. sp. resembles L. rostratum Ehr. superficially, but 

 their anatomical difterences are more conspicuous than their likeness. 

 Its favourite diet is diatoms and small rhizopods. 



Angaria nov. gen. is probably near Blepharisma in systematic 

 position. There are three species, A. undulans, A. ovata, and A. elon- 

 gata. Beonema nov. gen. I. dispar nov. sp. closely resembles in 

 contour Tracheophyllum apiculatum C. & L. If from the latter 

 the acutely conical anterior apex is removed and the flagellum of 

 Beonema be added, " the result would be a species of the genus now 

 under notice, the likeness between the contrasted forms being also 

 striking." The author thinks it may be considered a link intimately 

 connecting the two orders of the Flagellata-Eustomata and the Cilio- 

 Flagellata. 



Solenotus nov. gen. approaches nearest to Stein's Colponema, but 

 cannot be admitted into that genus by the absence of the anterior 

 curvature, by the apical origin of the trailing flagellum, and by the 

 presence of a dorsal instead of a ventral groove. Two species, S. 

 apocamptus and S. orbicularis, are described. 



Life-history of Stentor cseruleus.f— Prof G. W. Worcester gives 

 a detailed description of the development and life-history of Stentor 

 cceruleus, which can hardly be satisfactorily abstracted. When first 

 observed it appeared a motionless, intensely blue mass, containing 

 what seemed to be a row of internal vacuoles, which later proved to 

 be the moniliform endoplast of the mature infusorian. A larger 

 vacuole was observed that subsequently became the mouth. The mass 

 slowly changed its form, developing cilia at each extremity. The cilia 

 eventually disappeared from one end, the shape was constantly varied, 

 and in a little less than two hours it had put on the mature form and 

 was swimming very rapidly. Conjugation with another specimen was 

 then observed, each fastening itself by its posterior end to some 

 object, their backs meeting, when they would roll over each other till 

 their anterior extremities met. Conjugation lasted some moments 

 when the specimens separated and swam away. The individual ob- 

 served lost its bluish tint and became of a bronze colour. About an 

 hour and a half after the conjugation it stopped suddenly, assumed a flat 

 spread-out condition, whilst at the same time large vacuoles appeared 

 throughout its entire mass. In appearance it was amceba-likG and 

 after a time small masses became detached and immediately assumed 

 a globular form. The detachment of masses whilst in this amoeba-like 

 stage in other specimens was witnessed, as also their development into 

 mature forms. 



The main mass would in some instances disintegrate after portions 



* Amor. Journ. Sci., xxviii. (1884) pp. 88-'10 (10 figs.). 

 t Proc. Central Oliio Hci. A.sh(»c., i. (1881) pp. 'JT-lOG (4 plw) 



3 2 



