LEPTOCARDIT. 
Pisces 43 
LEPTOCAKDII. 
On the chorda of Amphioxus ; H. Joseph, Zeitschr. wiss. Zool. lix, pp. 511- 
536, pis. xxviii & xxix. : V. v. Epner, Anz. Ak. Wien, 1895, pp. 263 
& 264. 
On the posterior termination of the spinal cord of Amphioxus ; Retzius, 
Biol. Untersucb. (2) vii, pp. 26-28, pi. viii, figg. 1-9 [Reprint]. 
On the fecundation of the Amphioxus egg ; Sobotta, Anat. Anz. xi, 
pp. 129-137, figg. 
On fecundation and maturation of the ovum of Amphioxus lanceolatus ; 
Van der Sticht, Bull. Ac. Belgique (3) xxx, pp. 539-570, 2 pis. 
Remarks on the generic characters by T. Gill, Amer. Nat. xxix, p. 457. 
Amphioxides , n. g., for Branchiostoma pelagicum , Gthr.; Gill, t. c. 
