12 Ooel. • CG2 LENT E RATA. 
A general sketch of recent contributions to the morphology of the 
Hydroida is given by Allman. 
The comparative anatomy of the Rhizostomata is exhaustively treated ; 
two new species are described in detail, and the systematic position of the 
group is discussed j Lendenfeld (8). 
Flabellum michelini and F. pavoninum are described anatomically, and 
some criticisms offered on the writings of Bourne & Fowler ; Koch. 
Madracis asperula forms a eoenenchymatous colony, with septa pro- 
jecting above the general surface, and is morphologically intermediate 
between Caryophyllia and Seriatopora ; Fowler (3). 
Amphihelia ramea has a canal system between the body-wall and 
corallum ; in Stephanophyllia formosissima the body-wall is supported only 
by the costae ; id. t. c. 
Iu Penpatula phosphorea all the polyps of one leaf are arranged in the 
same direction ; the two dorsal septa only are ectodermal in origin, and 
gonads never develope on them ; Jungersen. 
The morphology of Cunoctantha and the new form Gastrodes is dis- 
cussed ; the latter is the larval form of a Cunina ; Korotnev (3). 
On the basis of an anatomical examination by means of thin sections, 
Parkeria is placed amoDg Hydrozoa ) intermediate between Hydrocoral- 
lina and the Hydractiniidce ; Nicholson (1). 
Presence of mural pores in Favositidce maintained ; id. (3). 
Thread-cells ; Cox ; Wilson, E. B. 
Large spicules of Acis orientalis , and possibility of the recognition of 
such as fossils ; Bell (2). 
Formation of the axis of Telesto trichostemma ; Studer (2). 
Remarks on spectrum of pigments from Anthea ; MacMunn. 
- Colouring matter of Hydra viridis ; Girod. 
Chemical characters of the pigment of Hydromedusa} ; Colasanti. 
In Velella and Porpita , about twice a minute, the lower surface is 
strongly pressed against the air chambers so as to expel their con- 
tents. These forms are thus Ccelenterata , which breathe air by traclieoa ; 
Chun (2). 
The process of ingestion in Hydra , and the minute anatomy of the 
digestive apparatus in different stages of the process ; Greenwood. 
Haacke’s observations on the Medusae of the Gulf of St. Vincent \cf. 
Zool. Rec. xxiv, Ccel. p. 4] are criticised , Lendenfeld (3). Reply ; 
Haacke (2). 
Specimens of Aurelia aurila lost from two-thirds to three-fourths of 
their weight by starvation for 150 days ; Varigny (1). Effect of poisons 
and of fresh water on Berce ovatus ; id. (3). 
In general those species which inhabit the shore can stand influence of 
fresh water better than those from deeper water ; id. (2). 
Pelagia noctiluca owes its phosphorescence to a luminous micro- 
organism {Bacterium pelagia ) ; Dubois. 
The propagation of the phosphorescence of Pteroules is almost certainly 
a phenomenon of turgescence, and by no means due to nervous con- 
duction ; Krukenberg (1). 
A few data in some other phosphorescent Coelenterates ; id. (2). 
