ANTHOZOA. 
Coel . 15 
43. Wriciit, Bryce. On some new species of Coral. Aud. N. H. (5) 
ix. p. 73. 
44. Wilson, E. B. Animal polymorphism. John Hopkins’ University 
Circulars, May, 1882, p. 203 ; and in Ann. N. H. (5) x. p. 416. 
The author refers to the dimorphism in the Pennatulida , and says the 
zooids are not degenerate polyps, but new formations which have inherited 
certain peculiarities from the sexual polyps. 
45. . Variation in the Yolk-cleavage of Renilla. Zool. Anz. v. 
p. 545. 
46. . The Development of Renilla. Abstr. in P. R. Soc. xxxiv 
p. 384. 
As in other A Icyonaria , Renilla is dioecious, and fertilization takes place 
in the water after the discharge of the generative elements. The division 
of the vitellus is apparently extremely variable, being at times regular, 
at times regularly meroblastic, and at others exceedingly irregular and 
unequal. The layers are differentiated by delamination. The radial 
septa and the horizontal or peduncular septum differ widely in structure 
and mode of origin. The former arise simultaneously at the anterior end 
and grow backwards. Each septum consists of two layers of endoderm 
cells separated by a structureless lamella. The peduncular septum arises 
at the posterior end, and grows backwards. It is composed of three layers 
of endoderm cells, the middle of which atrophies. The septa have a very 
marked bilateral arrangement. The dorsal pair of mesenterial filaments 
arises last and develops most slowly. The spicules developed in the 
interior of the cells are of two kinds, ectodermic and endodermic. The 
colony is produced by budding from the axial polyp. In the buds 
there is no trace of a peduncular septum and the mesenterial filaments 
appear in a different sequence. The buds to form sexual polyps always 
appear in symmetrically placed pairs. The zooids develope in the same 
manner as the polyps, and are indistinguishable from the latter in the 
earlier stages. The “ Hauptzooid ’’ is a bud of the axial polyp. Finally, 
the author considers Renilla to be related to the Balhyptilece and not to 
the Penniformes. 
New genera and species : — 
POLYACTINLzE. 
Actinaria. 
Hertwig (10) describes the following : — 
Anthcomorpha , g. n. Belonging to the now family Antheomorpliidce, which 
is distinguished from the family Corallimorphidcc by the absence of the 
intermediate secondary tentacles ; Antlieomorpha itself embraces those 
Antheomorphidce with a corona of tentacles placed in a single row; ten- 
tacles of different sizes decreasing according to the orders ; wall smooth. 
A. elegans (p. 30), 35° 22' N. lat., 169° 53' E. long., 2900 fath. 
Tealia bunodiformis (p. 35), Tristan da Cunha. 
