AllACIINIDA. 
265 
difjr'ada in gencraL He characterizes the gcmis and the previ- 
ously described species,, M. hvfdandii (C. A. Schultze), ikf. 
oherheiuseri (Doy.), and M. macromjx (Duj.), and also describes 
and figures 2 new species. The author discusses the subject of 
the revivification of the Macrohioti after desiccation, disposes 
of Elirenberg^s objections, and describes the natural history and 
anatomical structure of the animals. 
Tlie two plates (taf. G «& 7) contain, besides detailed figures of tlie 2 new 
species : — illustrations of the anatomical structure &c. of the Itnown species, 
such as feet and claws of M. Iivfekmdii, macranyx, and oherhiiuscri, figs. 3-6 ; 
oesophageal apparatus of M. hvfelandii and oherJuiuseri, figs. 0, 7 ; spermato- 
zoids of AT. hvfelandii, fig. 10 ; egg of M. oherhdnseri, fig. 12 ; terminations of 
nerves among epithelium of shin, fig. 14; oesophageal ring and brain and blood- 
coipuscles of M. hufclandii, figs. 16-17. 
3Iacrohiotus scJiidtzei, sp. n., Greefi', Arch, inikr. Anat. ii. p. 117, taf. 6. 
fig. 1, and anatomical details, figs. 3, 8, & 9, and egg, taf. 7. fig. 10 ; and M. 
tct)’adactyh(s, B\). n,, GrcefF, 1. c. p. 119, taf. G. fig. 2, claws, and taf. 7. fig. 13, 
cast shin with 4 eggs. Both in moss &c. on rochs, walls, and roofs. 
