578 
ZOOLOGICAL LITEllATUttE. 
rangement and nomenclature. Ann. & Mag. Nat. Hist. 
1868, vol. i. pp. 161-173. 
Gray, J. E. On the peculiar structure and function of the 
spicules of Hyalonema, Ibid. pp. 292-295. 
. Note on Hyalonema boreale, Loven. Ibid. p. 484. 
. On Hyalonema skboldii. Ibid. vol. ii. p. 264. 
. On a new form of Hyalonema sieboldii, and on its manner 
of growth. Ibid. pp. 264-276 (woodcut). 
. On Tetilla euplocamos and Hyalonema boreale. Ibid. 
p. 319, 
. Note on Hyalonema schultzei, Semper. Ibid. pp. 373- 
377, and woodcut. 
— — . On the name Alcyoncellum. Ibid. p. 390. 
. Letter from, containing a reply to Dr. Bowerbank^s re- 
marks on his ^ Notes on Sponges.' Proc. Zool. Soc. Lond. 
1868, p. 532. 
. Notes on Theonella, a new genus of Coralloid Sponges 
from Formosa. Ibid. pp. 565, 566 (figured). 
. Notes on Ceratellidee, a family of Keratose Sponges. 
Ibid. pp. 575-579 (figured). 
. Notes on Xylospongia cookii, a new genus of palmated 
Sponges in the collection of the British Museum. Ibid, 
p. 637. 
Hackel, E. Monographic der Moneren. Jenaische Zeitschrift 
fiir Med. u. Naturwissen. Band iv. Heft 1, Leipzig, 1868, 
pp. 64-137, Taf. 2 & 3. 
HackePs monograph of the Monera consists of : — 1. An his- 
torical introduction. This name was first applied to the non- 
nucleated amoebiform organisms by Hackel, in his ^ Generelle 
Morphologic ; ' and the group embraces some of the forms de- 
scribed by Max Schultze and Cienkowski. 2. Descriptions of 
new Monera — Protomyxa aurantiacaj Myxastrum radians, 
Myxodictyum sociale, Protamoeba primitiva. 3. Bemarks on the 
protoplasm theory, chiefly a rather strongly worded protest 
against the heresies of Reichert, whose writings are dignified by 
being called the most astonishing productions of modern zoo- 
logical literature." 4. On the limits of the Protista. This 
name is given by Hackel to the boundary kingdom " inter- 
mediate between the animal and vegetable kingdoms. In our 
special part we give the groups placed in this third kingdom by 
Hackel. 5. The comparative morphology of the Monera. 
6. The systematic arrangement of the Monera. 
