88 
PISCES. 
3. Rhinobatus (Gthr.), with 18 species, one being new, Rh. spinosus, from 
Mexico, p. 618. 
4. Trygonorhina (M. & H.), with 1 species. 
Fam. 3. ToiiPEDiNiDiB. 4 
^ 6. Torpedo (Duin.), with 9 species, one being new, T. smUIiii, from South 
Africa (?), p. 461. 
6. Narcine (Henle), with 6 species. 
7. Hypnos (Dum.), with 1 species. 
8. Discopyge (Tschudi), with 1 species. 
9. Astrape (M. & H.), with 2 species. 
10. Temera (Gray), with 1 species. 
Fam. 4. IlAjiDiEj. 
11. Raja (Guv.), with 40 species. 
\%^Psammohatis rudis (gen. et sp. nov.), from Magellan Straits, p. 470. 
13. Sympterygia (M. & H.), with 1 species. 
14. Platyrhina (M. & H.), with 2 species. 
Fam. 6. Tbygonid.®. 
16. TJrogymnus (M. & H.), with 1 species. 
16. Ellipesurus (Schomb.), with 1 species. 
17. Trygm (Adanson), with 29 species. New are : — T. punctata, from 
the East Indies (?), p. 474 \ 2\ nuda, from India, p. 476 ; T. mar- 
garita nudi^rudis, from West Africa, p. 479. 
18. Tceniura (M. & H.), with 9 species. 
19. Urolophus (M. & H.), with 6 species. 
20. Pteroplatea (M. & H.), with 7 species. 
Fam. 6. Myliobatid^. 
Group A. Myliobatina. 
21. Myliohatis (Guv.), with 10 species, one being new, M. cornuta, from 
Japan, p. 490. 
22. Aelohatis (M. & H.), with 1 species. 
23. Rhinoptera (Kuhl), with 8 species, one being new, Rh. polyodon, 
hab. — ?, p. 495. 
Group B. Geratoptebina. 
24. Dicet'obatis (Blainv.), with 6 species. 
26. Ceratoptera (M. & H.), with 2 species. 
Selache maxima. Th. Gornish describes a Shark apparently of this spe- 
' cies, captured on the coast of Gornwall. Zoologist, 1870, pp. 2253-2260. 
V Spinax acanthias. Embryo figured by Van Beneden in M(Sm. Ac. Belg. 
[ xxxviii. 1870, pi. 7, 
Pristis. Prof. Kolliker and Dr. Giinther haye determined the singular 
( body described by Dr. Gray under the name of Myriosteon higginsii as one 
' of the hollow tubes of the saw of Pristis. Gray, Ann. & Mag. 1870, v. 
p. 366. As these tubes are homologous with the rostral processes of the 
j Bays generally, Mr. Garter is quite right in stating that he had extracted a 
i Myriosteon from the snout of a Bay. Ibid. p. 449. 
Torpedo narke. On the final distribution of the nerves in the electric 
organ, by G. V. Giaccio, Arch, per la Zool. Anat. e Fisiol. 1870, ii. pp. 6-9. 
rCephaloptera. A. Dumeril has noticed the prsebranchial appendages de- 
