350 
5E£ACHII. 
fcjs^i 77 t^o pfM 
1876. Sphenodus longidens, E. Favre, Foss. Terr. Oxford. Alpes Tribourg. 
'Mem. Soc. Pal. Suisse, vol. iii.), pi. ii. fig. 2. 
Type. Detached dental crowns : Munich Museum (in part). 
The type species, of moderate size. Dental crown narrow, at¬ 
taining a maximum height of about O'03, and scarcely sigmoidally 
curved; inner coronal face gently convex, outer faceMat or slightly 
convex ; cutting-edges very prominent. 
, 0. macer was only distinguished by Quenstedt on account of its 
occurring at a somewhat higher horizon than the t 'cal teeth. 
Form, Log. Oxfordian: Bavaria and AY iirteml g. Corallian : 
Wurtemberg and Hanover. Upper Jurassic : Government of Mos¬ 
cow, Bussiay Vh/Ww 0<. / 2tJL, q nz -**— 
P. 1254-5. Typical dental crown, and small example; Oxfordian, 
Babenstein, Bavaria. Egerton Coll. 
P. 5753. Three small dental crowns; Babenstein. Enniskillen Coll. 
P. 1256. Small dental crown ; Oxfordian, Streitberg, Franconia. 
Egerton Coll. 
22489, 22503, 22658. Eight dental crowns; Corallian, Schnaitheim, 
Wurtemberg. Purchased, 1848. 
P. 2370. Dental crown; Schnaitheim. Enniskillen Coll. 
The following species are also distinguished, hut there are no 
examples in the Collection :— 
Orthacodus impressus , K. A. von Zittel, Fauna Aelt. Cephalopo- 
denfiihr. Tithonbild. (Suppl. to Palmontogr., 1870), p. 25, 
pi. i. figs. 3, 4 {Sphenoclus).— Tithonian ; Southern Alps. 
Orthacodus nitidus , A. Wagner, Abh. konigl. bay. Akad. Wiss., 
(* Cl. vc 1 . ix. (1863), p. 290, pi. iv. fig. 4 
- (Sphenodus ).—Lithographic Stone ; Bavaria. 
77 * C ‘ 7^7 ' Orthacodus tithonius, G. G. Gemmellaro, Studi Paleont. Fauna 
Calc, a Terebratula janitor N. Sicilia, pt. i. (1868—76), 
p. 8, pi. ii. figs. 32-41 (Sphenodus).— Upper Jurassic; 
Sicily e ^ ^ Ot?' ^ "k-Q 
Orthacodus virgai, G. G. Gemmellaro, op. cit. pt. i. p. 8, pi. ii. 
figs. 42-47 (Sphenodus). —Upper Jurassic; Sicily. 
To this genus also Quenstedt (Handb. Petrefakt. 3rd edit. 1882, 
p. 271) refers the Liassic tooth named Lamna liassica , U.Schon- 
bach (Neues Jahrb. 1863, p. 166). 
