46 Verm. 
xv. VERMES. 
21. Stokes, A. 0. (1) Notes on the genus Apsilus and other American 
Rotifera. J. R. Micr. Soc. pp. 269-278, pi. vi. 
22. . (2) Structural features in American Rotifera. Sci. Gossip, iii, 
pp. 121, 122, 148 & 149, 1 fig. 
Criticized by Rousselet (16). 
23. . (3) Some new forms of American Rotifera. Ann. Nat. Hist* 
xviii, pp. 17-28, pis. vii & viii. 
24. Thorpe, Y. G. Notes on a new species of Peclalion found in the 
Solomon Islands. P. Soc. Tasmania, 1894-95 (1896), pp. 40 & 41. 
25. c 'Ward, H. B. A biological examination of Lake Michigan in the 
Traverse Bay Region. Bull. Michigan Fish Comm. 151 pp., 2 figg., 
5 pis., maps. 
26. Zaciiarias, 0. Forschungsberrichte aus der biologischen Station 
zu Pion, IV. Friedlander : 1896, 290 pp., 1 pi., 45 figg., 1 map. 
27. ^Zelinka, C. Monographic der Echinoderen. Yerh. Zool. Ges. vi, 
pp. 197-199,23 pis. 
BIOLOGY. 
Skorikow (20) has a well-illustrated treatise on the Rotifers of 
Charkow. 
The peculiar Trochosphcera solstitkdis, hitherto only known to occur 
in China, the Philippine Is., and Australia, has now been found in 
America, and is briefly described by Kofoid (12). 
Hartog (7) tries to maintain that the affinities of the Rotifers are 
rather with the Pilidium- than with the Trochosphere- larva. Rousselet 
(16) shows that the peculiarities mentioned by Stokes in American 
species occur also in their European representatives, and (17) gives a 
list of species whose males are known, and describes the male of 
Rhinops vitrea. Dixon-Nuttall (4) describes that of Stephanoceros 
eichhorni. 
The parasitic Rotifers of plants are dealt with by Frank (5), and 
Rotiiert (14) deals with the one parasitic on Vancheria. 
A monograph of the Echinoderidce by Zelinka is announced and 
briefly summarised (27). He would divide the group into 2 orders, the 
Homalorhagte (with 3 families), and the Cyclorhagce (with 2 families), 
and describes the development by metamorphosis. 
GEOGRAPHICAL DISTRIBUTION. 
Sandhurst : Bog ponds ; Rousselet. 
Denmark (Ponds, &c.); Wesenberg-Lund. 
Baltic (compared with' Extra-Baltic) : Brackish water, 2 species, p. 11 
( Synchceta ); Euryhaline, 1 species, p. 45 ; Aukivillius. 
Tergern See : 3 species ; Richard, Zool. Auz. xix, p. 29. 
Alpine Lakes of Tessin ; Fuhrman. 
Hungary : Rotifers and Gastrotricha ; Daday (2). 
Russia : Near Charkow, 140 species ; Skorikow. 
