90 
SELACHII, 
Genus ONCOBATIS, Leidy. 
[Proc. Acad. Nat. Sci. Philad. 1870, p. 70.] 
Dermal tubercles of pentagonal outline, with the under surface 
convex and smooth ; upper surface presenting five sloping planes, 
more or less well defined by prominent borders, the raised central 
portion covered with gano-dentine. [? Raja .] 
Oncobatis pentagonus, J. Leidy, Joe. cit., and Extinct Yert. Eauna 
West. Territ. (Pep. XJ. 8. Geol. Surv. Territ. vol. i. pt. i. 
1873), p. 264, pi. xvii. figs. 18, 19.—Pliocene; Sinker 
Creek, Idaho. 
Family TOPPEDXNIDLE. 
Disk broad, smooth; skeleton of pectoral fins not continued for¬ 
wards beyond the base of the snout. Median fins well developed. 
An electric organ between the pectoral fins and the head. 
Genus TORP3B130, Dumeril. 
[Zool. Analyt. 1806, p. 102.] 
Syn. Narcobatis, de Blainville, Faune Fran^aise—Poissons, 1820-30, 
p. 43. 
Tail moderately developed, with two dorsal fins; pelvic fins sepa¬ 
rate ; spiracles at a short distance behind the eyes. 
Torpedo egertoni , A. de Zigno, Mem. P. Istit. Yeneto, vol. xx. 
(1878), p. 452, pi. xvii.—Middle Eocene; Monte Bolca, 
near Yerona. 
Torpedo gigantea , L. Agassiz, Neues Jahrb. 1835, p. 297, and 
Poiss. Foss. vol. iii. p. 382**: Raja torpedo (Linn.), Yolta, 
Ittiolit. Yeron. 1796, p. 251, pi. 61 : Narl'obatus gigan- 
teus , de Blainville, Nouv. Diet. d’Hist. Nat. vol. xxvii. 
1818, p. 337.—Middle Eocene; Monte Bolca. 
Torpedo , sp., C. Hasse, Natiirl. Syst. Elasm., Besond. Theil, p. 176, 
pi. xxiii. figs. 15-18. 
Detached vertebrae, supposed to belong to Astrape , have been re¬ 
corded from the amher-bearing beds of Samland, East Prussia 
(E. Noetling, Abh. geol. Specialk. Preussen u. Thiiring. Staaten, 
vol. vi. pt. 3, Lief. i. p. 36, pi. viii. figs. 6-9). They are named 
Astrape (?) media, and were originally referred to Torpedo by 
C. Hasse, Palaeontogr. vol. xxxi. (1884), p. 5, pi. i. figs. 6, 7. 
Yertebrae of Narcine are also recorded by Hasse from the Tufeau 
de Ciply (Natiirl. Syst. p. 178, pi. xxiii. figs. 22, 23) and the Brux- 
ellian of Woluwe St. Lambert (op. cit. p. 178, pi. xxiii. figs. 24, 25). 
