42 Pisces. 
V. PISCES. 
Petalodus securiger , n. sp., O. P. Hay, J. Geol. iii, p. 561, figg., Carboni- 
ferous, Illinois. 
E. W. Claypole reviews recent contributions to our knowledge of 
Cladodont Sharks ; Amer. Geol. xv, pp. 363-368. 
Short remarks on the Cladodonts of the Upper Devonian of Ohio; Clay- 
pole, Rep. Brit. Ass. 1895, p. 694. 
Cladoselache newberryi , n. sp. (foss.), Dean,.} Tr. N. York Ac. xiii, 1894, 
p. 115, pi. i, Devonian, Linton, Ohio. 
O. Jaekel, SB. Ges. naturf. Berlin, 1895, pp. 69-85, writes on the organ- 
ization of the Pleuracanthidai . 
Tremataspidw (foss.) : remarks by J. Y. Boiion, Pull. Ac. St. Petersb. 
(2) iv, 1894, p. 201, with description of Trenuitaspis schmidti , Rohon, 
p. 206, pis. i & ii. 
O. M, Reis, Geognost. Jahresh. vi, 1894, pp. 49-66, figg., has a further 
contribution to the knowledge of the fossils Acanthodes, Machcera- 
canthus, and Gyracanthus. 
Menaspis armata. , Ewald. (f oss ) : O. M. Reis, in a pamphlet published 
in Munich, further discusses the nature of these spines. 
Ctenacanthus (?) erectus, n. sp. (foss.), A. v. Koenen, Abh. Ges. Gotting. 
xl, No. 2, p. 3, Devonian of Biidesheirn, near Gerolstein. 
( kdolepia zitteli , n. sp. (foss.), ItouoN, M6m, Ac. Pdtersb. xli, 1893, No. 6, 
p. 30, pi. i, fig. 10, Upper Silurian, Oesel. 
Thelolepis volborthi and tulensis , n. spp. (foss,), id. ibid. pp. 36 & 37, 
pi. i, figg. 14 & 15, Upper Silurian, Oesel. 
Anciatrodus , n. g. for small teeth allied to Monopleurodus. A. gracilis , 
n. sp., id. ibid • P- 51, pi. i, figg- 31 & 32, Upper Silurian, Oesel. 
OYCLOSTOMI. 
J. Schaffer, Anat. Anz. x, pp. 697-708, figg., investigates the structure 
of the branchial apparatus of An\moc(x.tes\ C. v. Kupffer, Verh. 
Anat. Ges. ix, pp. 105-122, the development of the branchial skeleton. 
On the epithelium of the branchial cavity in Ammocostes ; J. Schaffer, 
Arch. mikr. Anat. xlv, pp. 294-338, pis. xix & xx. 
On the posterior termination of the spinal cord in Myxine and Petro- 
myzon ; Retzius, Biol. Untersuch. (2) vii, pp. 29-33, pis. viii & ix 
[Reprint]. 
On the eye of Myxine and Petromyzon ; C. Kohl, Bibl. Zool. v, pp. 185- 
204. 
On the hypophysis ot Myxine, and the parietal eye of Ammocostes ; 
Retzius, Biol. Untersuch. (2) vii, pp. 19-25, pi. vii. 
Geotria chilemis, Gj’fiy, noticed and figured by Berg, An. Mus. Buenos 
Aires, iv, p. 122, pi. ii, figg. 2 & 3. 
