20 Pisces. 
PISCES. 
Emery, (b) On the morphology of the Pronephros in Teleostei . [See 
Grosglik.] 
Grassi. Lo sviluppo della colonna vertebrate ne’ pesci ossei. 
Henneguy. On the primitive streak in Osseous Fishes.' 
Janosik. Partielle Furchung bei den Knochenfischen. 
Klein. Beitrage zur Bildung des Sckiidels der Knochenfische, pt. ii. 
Maurer. Mittheilung liber die Schilddriise und Thymus der Knochen¬ 
fische. 
0wsiannikow. Studien liber das Ei hauptsachlich bei Knochenfischen. 
Ryder. (b) The development of the rays of Osseous Fishes ; extract 
of a paper which will appear in the P. U. S. Kat. Mus. 
——. (e) The author, taking Lophius as an extreme type of Physo- 
clist Fish, in which the tendency to shift the pelvic limbs forwards is 
strongly marked, is of opinion that this must have commenced to mani¬ 
fest itself far back in the ancestral history of these Fishes, and that the 
Physoclisti have descended from the Physostomi . 
- . (e) The development of the spines of the anterior dorsal of 
Gastrosteus and Lopliius . 
— —. (f) On the formation of the embryonic axis of the Teleostean 
embryo by the concrescence of the rim of the blastoderm. 
--. (h) On the manner in which the cavity of the heart is formed 
in certain Teleosteans. 
-. (j) Gives a summary of our knowledge respecting the best- 
known of the truly viviparous Osseous Fishes characterized by an intra- 
follicular or intraovariau development. Long extracts are given from 
papers by American authors on this subject. The new observations 
recorded on the changes undergone by the embryos of the Embiotocids 
during gestation relate to the development of the intestine and the 
vascular supply of the median fins, both of these organs undergoing 
changes which appear to the writer to have considerable significance. 
The author also adds notes on the act of copulation and the birth of the 
young of Gambusia , as observed by Mr. A. A. Duly. 
-. (k) On the development of the Salmon. 1 and 2. On the deve¬ 
lopment of the vertical and paired fins ; 3. The embryonic blood vascu¬ 
lar system ; 4. The diseases or abnormalities which involve the yelk sac 
and vitelline circulation of salmon embryos. 
■- . (l) A contribution to the development of Osseous Fishes, with 
special reference to the development of Gadus morrliua . 
Tichomiroff. Zur Entwucklung des Schadels bei den Teleosteern. 
Wenckebach. Development of the blood-corpuscles in the embryo of 
Perea Jiuinatilis . 
Wright, (a) On the auditory organ of Hypoplithalmus . 
ACANTHOPTERYGII. 
Percidj:. 
Perea fluviatilis , L.: on the development of the blood-corpuscles in the 
embryo ; Wenckebach, p. 231, pi. xi. P . rhomboidalis , L., = Lagodon 
rhomboides , auct., and must stand as L. rhomboidalis , L.; Goode & 
