CESTEACIONTIDJE. 
249 
Though not entirely appropriate in significance, this name may bo 
provisionally retained for the Triassie Selachians with teeth much 
resembling those termed Strophodus — no dorsal fin-spines with 
tubercular ornament having hitherto been discovered in the Trias, 
and other facts suggesting the generic distinctness of the fish in 
question. 
Palaeobates angnstissimus (Agassiz). 
1837. Punmmothis anguMissimm, II. B. Geinitz (ex Agassiz, MS.), Beitr. 
Kennt. Thiiriiig. Muschelkgeb. p. 22, pi. iil. figs. 6, 7. 
1838. Strophodus angustissimus, L. Agassiz, Poiss. Foss. vol. iii. p. 128, 
pi. xviii. figs. 28-30. 
(?) 1838. Strophodus elytra, L. Agassiz, tom. cU. p. 128 b, pi. xviii. fig. 31. 
1849. Paleeobates angustissimus, II. von Meyer, Palajontogr. vol. i. 
p. 233, pi. xxviii. figs. 14, V>. 
1801. Paleeobates angustissimus, E. E. Schmid, Nova Acta Acad. Caes. 
Leop.-Car. vol. xxix. no. 9, p. 8, pi. i. figs. 4-15. 
1861. Paleeobates oralis, E. E. Schmid, loc. cit. p. 9, pi. i. figs. 16- 24 *. 
1801. Paleeobates acrodiformis, E. E. Schmid, he. cit. p. 9, pi. i. 
figs. 25-27. 
(?) 1801. Paleeobates angustus, E. E. Schmid, loc. cit. p. 7, pi. i. figs. 1-3. 
1805. Strophodus angustissimus, II. Eck, Form. bunt. Sandst. u. 
Muschelk. Oberschlesien, p. 62. 
Type. Detached teeth. 
Scarcely yet definable. Principal teeth very long and narrow 
with rounded extremities. 
As already recognized by Eck, the supposed specific differences 
between three of the forms of teeth described by Schmid correspond 
merely with differences of situation in the jaw. Agassiz’s Strophodus 
elytra and Schmid’s Palaiubates angustus may be distinct, but cannot 
yet be definitely separated. 
Form. 4’ Poe. Muschelkalk: Silesia, Thuringia, Bavaria, Wiirtem- 
berg, Saxe-Weimar, Alsace-Lorraine, and Eastern France. Epper 
Bunter : Rhenish Bavaria. 
P. 5563. Two elongated teeth ; Upper Muschelkalk, Beuthen, 
Silesia. Purchased, 1888. 
1115-6. Two moderately elongated teeth, and one anterior tooth ; 
Laineck, near Bayreuth, Bavaria. Braun Coll. 
P. 2666. Elongated tooth, the crown slightly raised towards one 
extremity; Laineck. EnnisMllen Coll. 
' Another tooth from tlie Muschelkalk, probably of Paleeobates, is named 
Strophodus oralis, C. G. Giebel, Fauna d. Vorw,, Fische (1847), i>. 330. 
