GANOIDEI, CHONDKOPTEJRYGII. 
Pisces. 7 
GANOIDEI. 
Huxley, T. Coutribufcious to Morphology. Ichtliyopsida, No. 1. On 
Ceratodiis forsteri, with Observations on the Classification of Fish es. 
P. Z. S. 1876, pp. 24-58. 
1. The anterior nares of Ceratodus cannot be said to open into the 
cavity of the mouth, inasmuch as they lie outside the premaxillary por- 
tion of the upper lip, and are not enclosed by the maxillary portion of 
that lip. The* position of the anterior nares on the under face of the 
snout is an embryonic feature retained in the Dipnoi^ the Selachians, 
and probably many early Ganoidei. A comparison of the nasal 
apertures and passages is made with those of Sc^Uium, Cestracion, and 
Chimcera. 
2. Internal structure of Ceratodus ; the brain, the skull, and the pec- 
toral limb. 
3. Taxonomy of Ceratodus, and remarks on the classification of 
fishes [see supra^. Griinther’s group Palceichthyes is objected to, on 
the ground that it brings into undue prominence the differences 
between the Teleostei and the other ‘ hyostylic ’ fishes, and that it is 
better to retain the Mullerian groups as equivalent assemblages. 
Wilder, B. G. Notes on the North American Ganoids, Amia, Lepi~^ 
dosteus, Acipenser, and Polyodon. P. Am. Ass. (1875) 1876, pp. 
151-196, 3 pis. 
A lengthy memoir on the physiological characters, the brain, heart, 
and respiratory organs of Ganoid fishes, with sketch of a provisional 
arrangement of Vertebrates According to cerebral and cardiac characters. 
'Section ii. of this paper “ On the transformations of the tail of the Gar- 
pike {Lcpidosteus)'’ pp. 153-166, is of special interest. 
Neoceratodus hlancJiardi, g. & sp. nn., F. Castlenau, J. Zool. v. p. 132 ; 
= Ceratodus forsteri, juv., id. 1. c. p. 343. 
Notes on Ceratodus,^ hy the same, communicated by Gervais ; C. R. 
Ixxxiii. p. 1034. ^ 
^ On the habits of living. Ceratodi in captivity ; E. P. Ramsay, P. Z. S. 
1876, p. 698. 
On their habits in their native conditions and on their colours when * 
alive ; Schmeltz, J. Mus. Godeffr. viii. p. 138. 
/ 
CHONDEOPTERYGII. ‘ 
/ Balfour, F. On the development of the Spinal Nerves in Elasmo- j 
j branch Fishes. Phil. Tr. clxvi. pp. 175-196, pis. xvi.-xviii. I 
\ , On the origin and history of the Urino-genital Organs of j 
j Vertebrates. J. Anat. Phys. x. pp. 17-48. j 
/ Deals especially with these organs in the Selachia. | 
