LAMNIDJE. 
351 
Somewhat doubtfully placed in this genus is Sphenodus sabau- 
dianus , Pictet (Foss. Terr. Xeocom. Yoirons, pt. iii. (1858), p. 50, 
pi. vii. figs. 9-11), from the Xeocomian of Yoirons, apparently 
figured under the name of S. salentinus by P. Gervais (Zool. et Pal. 
Frang., 2nd. edit. p. 524, pi. lxxvi. figs. 9, 10); and Lanina ( Spheno- 
dus) plana, Agassiz (Poiss. Foss. vol. iii. 1843, p. 298, pi. xxxvii. 
figs. 30-32), from the Cenomanian of Switzerland, is probaWy a true 
Lamna. 
Genus SCAPANORHYNCHUS, nov. 
Syn. Rhinognathus, J. W. Davis (non Rhinognathus, Fairmaire, 1873), 
Trans. Roy. Dublin Soc. [2] vol. iii. 1887, p. 480. 
Body slender, snout much elongated. Second dorsal fin small, 
placed immediately above a long anal. Caudal fin much elongated, 
inferiorly notched near the extremity. Teeth with a long slender 
principal cusp, and mostly with a pair of minute lateral cusps. 
This genus is very imperfectly defined by J. W. Davis ( loc . cit.) 
under the preoccupied name of Rhinognathus , and erroneously 
referred to the Spinacidae. JW v/. -C-jp/'uxtjr 
Scapanorhynchus lewisii (Davis). 
1887. Rhinognathus lewisii , J. W. Davis, Trans. Roy. Dublin Soc. [2] 
vol. iii. p. 480, pi. xiv. fig. 4. 
Type. Imperfect fish ; Edinburgh Museum. 
Length of snout in advance of the mouth not more than twice as 
great as the width of the head at this position. Extent of the 
caudal fin nearly equal to the entire length of the trunk in advance 
of its origin. Teeth with the inner face of the coronal cusp promi¬ 
nently striated. 
Form. Sf Loc. Upper Cretaceous (Senonian) : Sahel Alma, Mount 
Lebanon, Syria. 
48099. Imperfect remains of the head and a fragment of the ante¬ 
rior portion of the trunk, with indications of the pectoral 
arch and fins. A number of teeth are well shown, one 
being drawn, four times the natural size, in PI. XYII. 
fig. 6 . Purchased , 1877. 
49473. Crushed snout and head, with numerous teeth in position, a 
few anterior vertebrae, and the left pectoral fin. Two of 
the anterior teeth are shown, of three times the natural size, 
from the inner and outer aspects, in PI. XYII. figs. 4, 5. 
Purchased , 1878. 
