10 Ccel. 
CCELENTERATA. 
opinion expressed that Syringopora and the Favositidce should be placed 
amongst the Alcyonaria. 
17. Koch, G-. yon. Die ungeschlechtliche Yermehrung (Theilung und 
Knospung) einiger palaeozoischen Korallen. Palaeontogr. xxix. p. 327, 
pis. xli.-xliii. 
The author commences by describing the multiplication of the fol- 
lowing palaeontological corals :—Stauria favosa , Acervularia , Fascicu- 
laria , Eeliolites, Favosites, Syringopora, and Syringopliyllum ; and then 
passes on to describe the same ’process in the following recent corals : — 
Galaxea , Astroides, Eeliopora , and Tubipora. As a result of these investi- 
gations he is able to distinguish the following different modes of 
budding: — 
I. Internal budding. 
a. Budding by division. 
B. Internal gemmation. 
a. Septal gemmation. 
b. Tabular gemmation, 
ir. External budding. 
a. Intermediate gemmation. 
B. Coenenchym gemmation. 
C. Stolon gemmation. 
The paper concludes by a description of the part played by the soft 
parts in the process. 
18. Koren, J., & Danielssen, D. 0. New Alcyonarians. Gorgonids 
and Pennatulids of the Norwegian Seas. Bergen : 1883, 4to, 38 pp., 
13 pis. Abstr. in J. R. Micr. Soc. (2) iv. p. 239. 
The authors describe a new genus, Duva, with 3 new species, and a new 
genus ( Gcendul ) of Pennatulids, constituting a new family, Gcendulece. 
19. Kowalewsky, A., & Marion, A. F. Documents pour l’histoire 
embryog^nique des Alcyonaires. Ann. Mus. Marseille, i. pp. 1-43, 
pis. i.-v. 
The paper commences with the description of the development of 
Clavularia prolifer a and Sympodium coralloides [Zool. Rec. Ccel. xix. p. 12], 
and proceeds to describe some abnormal developments of the ovum of 
the latter. The second part contains some general considerations on the 
blastodermic layers of the Coelenterates, and on the nature of the meso- 
derm, and the authors therein controvert the theory that the mesoderm 
layer of the Coelenterates is homologous with the mesoblast layer of the 
Coelomates. 
20. Lacaze-Duthiers, H. de. Etude d’une Actinie prise comme type. 
Son embryogenie et son organisation. Rev. Sci. 1883, pp. 513-520. 
This is a popular account of the anatomy and development of a Sea- 
anemone, illustrated by several woodcuts. 
21. Lendenfeld, R. yon. Zur histologie der Actinien. Zool. Anz. vi. 
p. 189. 
The researches were made on species of Adamsia , Anthea , and Phyllac - 
