PROTOZOA, 
671 
IIackel, Ernst. Ueber den Organismus der Scliwamme und 
ibre Verwandtschaft mit den Corallen, Jenaiselie Zeit- 
schrift, Bd. v. pp. 207-254. 
To this memoir is appended a Prodromus of a system of Cal- 
careous Sponges. The author says that if we try to make an 
artificial boundary between vSponges and Corals^ we find nothing 
of essential importance, save a higher degree of differentiation 
in the corals, and their possessing urticating cells ; but this his- 
tological character is unimportant, and both physiologically and 
morphologically is but little adapted to establish a well-defined 
boundary. He, however, points out a very important, if abso- 
lutely established, difference, i. e. that sexual differentiation has 
not advanced so far as to differentiate sperm cells ; and the 
supposed germ cells (ova) are probably agamic spores. It is 
of course here quite impossible to more than indicate the im- 
portant facts. 
Jones, T. R., Parker, W. K., and Kirkry, J. W. On the 
nomenclature of the Eoraminifera. — Part xiii. The Permian 
Trochammina pusilla and its allies. Ann. & Mag. Nat. 
Hist. ser. 4, vol. iv. Dec. 1869, pp. 386-392, pi. 13. 
Kent, W. S. On some new Infusoria from the Victoria Docks. 
Monthly Mic. Journal, May 1869, pp. 289-293, pi. 12. 
Macdonald, J. D. On the structure and relationship of the 
simple or nucleated and the compound or punctate forms 
of Thalassicollidae. Quart. Journ. Mic. Science, 1869, 
pp. 147-149, pi. 11, 
Moore, T. J. On the habitat of the Regadera (watering- 
pot) or Venus^s flower-basket {Euplectella aspergillum, 
Owen). Ann. & Mag. Nat. Hist. ser. 4, vol. iii. March 
1869, pp. 196-199 (woodcuts). 
The author mentions, on the authority of Captain Morgan, 
that the only place where this sponge is found is about three 
miles from the shore in front of the small village Talisay, whicli 
is about five or six miles south of the town of Cebu, Isle of 
Cebu. The mode of catching them is described. 
Moxon, W. On some points in the Anatomy of Stentor, and 
on its mode of division. Journ. Anat. and Physiol. 1869 
(May), pp. 279-293, pis. 5 & 6. 
The author states the results of some observations on Stentor 
cceruleus, and discusses certain questions concerning the anatomy 
of Infusoria. Dr. Moxon seems to regard the contractile vesicle 
as an organ connected with the excretion of food. 
Muller, C. J. On Vaginicola valvata. Quart. Journ. Mic. 
Science, 1869, pp. 25-27, pi. 7. 
Norman, A. M. Notes on a few Hebridean Sponges, and on a 
