168 
SELACHII. 
Notidanus thevenardi , E. Delfortrie, Actes Soc. Linn. Bordeaux, 
vol. xxxii. (1878), p. 256, woodcuts.—Ealuns; St. Medard, 
Gironde, Erance. [Lower median tooth.] 
Notidanus urcianensis , B. Lawlej% Toe. cit. vol. iv. (1879), p. 198. 
—Pliocene; Tuscan} 7 . [Lower median tooth.] 
- f • Of the above species, those founded upon lower median teeth are 
7 especially doubtful. The so-called Notidanus amalthei , Oppel 1 , from 
Eias of Wiirtemberg and Yorkshire, has been recorded upon the 
/?■ ^tfrfflence of indeterminable fragments ; and the present writer has 
fxJ yi'ld been unable to confirm Munster’s determination 2 of a tooth of this 
genus from the same horizon. A tooth from the Oxfordian of 
Switzerland ascribed to Notidanus by E. Favre 3 appears also to be 
doubtfully determined, and most likely pertains to Hybodus. 
The caudal region of a Selachian from the Lithographic Stone of 
Bavaria, named Aellopos ivayneri by Agassiz (Poiss. Foss. vol. iii. 
1843, p. 377), is also referred to Notidanus by A. Wagner, Abh. k.- 
bay. Akad. Wiss. math.-phys. Cl. vol. ix. p. 296. A nearly complete 
fish, from the Upper Cretaceous of Mount Lebanon, is also described 
under the name of N. gracilis , J. W T . Davis, Trans. Boy. Dublin Soc. 
[2] vol. iii. p. 470, pi. xiv. fig. 1. The former specimen is preserved 
in the Munich Museum, the latter at Edinburgh. 
Notidanus biserratus, Munster (Beitr. Petrefakt. v. 1842, p. 66, 
ph xv. fig. 9), from the Oligocene of the Yienna Basin, is founded 
upon an imperfect tooth of Galeocerclo, now in the Munich Museum. 
Some awl-shaped teeth from the “ marls of Yew Jersey,” appa¬ 
rently referable to the symphysis of the upper jaw of Notidanus , are 
described under the name of Xiphodolamia ensis , J. Leidy, Journ. 
Acad. Yat. Sci. Philad. [2] vol. viii. (1877), p. 252, pi. xxxiv. 
figs. 25-30. 
/Pa 
y </];/$■ /? Spy 
Grenus CH 
CHLAMYDOSELACHE, Garman. 
[Bull. Essex Institute, vol. xvi. 1884, p. 52.] 
Body much elongated, slender; mouth terminal; gill-openings 
six, with anterior flaps of skin, the first especially large. Dentition 
similar in both jaws, but a median symphysial series of teeth only 
1 A. Oppel, Wiirtt. Jakresh. vol. x. (1854), p. 62, pi. i. fig. 1; Tate & Blake, 
Yorksh. Lias, 1876, p. 256; A. S. Woodward, Geol. Mag. [3] vol. iii. (1886), 
pp. 208, 525. The described specimens are respectively in the Museums of 
Munich and Whitby. 
2 Beitr. Petrefakt. vi. (1843), p. 55. 
3 Mem. Soc. Paleont. Suisse, vol. iii. (1876), p. 16, pi. ii. fig. 1. 
