37 Pisces. 
riscES. 
Freud, S. Ueber den Ursprung der hinteren Nervenwurzeln im Riicken- 
mark von Ammocaetes {Petromyzon planeri). SB. Ak. Wien, Ixxv. 
Abth. iii. pp. 15-27. 
A note by Goette on the Roots of the Spinal Nerves in the Lam- 
prey; Zool. Anz. i. p. 11. 
r Kupffer, 0., & Benecke, B. Der Vorgang der Befruchtung am Ei 
' der Neunaugen [^Petromyzori] beobachtet. Konigsberg: 1878, 4to, 
^ 24 pp. 1 pi. 
l' Per^pelkine, K. Sur la Structure de la Notocorde de la Lamproie 
{Petromyzon Jluviatilis). Bull. Mosc. liii. pt. i. pp. 107 & 108. 
V Lan GERMANS has also published a very extensive memoir of all parts 
of the structure of Petromyzon planeri, in Verh. Ges. Freib. vi. Heft 3. 
Bdellostoma stouti, sp. n., W. N. Lockington, Am. Nat. xii. p. 793, Hum- 
boldt County, California. 
LEPTOOARDII. 
Amphioxus. On the chorda dorsalis ; J. Renaut & G. Duchamp, C.R. 
' Ixxxvi. p. 898. 
C Account of the finding of didoAi Amphioxus in Heligoland; Ehlers, 
Zool. Anz. i. p. 247. 
Nusslin, O. Zur Kritik des Amphioxus-auges. Dissert. Tubingen, 
\ 33 pp 2 pis. 
