CESTKACIOXTIDiE. 
249 
Though not entirely appropriate in significance, this name may bo 
provisionally retained for the Triassic 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 angustissimus (Agassiz). 
1837. Psammodus angustissimus, H. B. Geinitz (e.r Agassiz, MS.), Beitr. 
Kennt. Thiiring. Muschelkgeb. p. 22, pi. iii. figs. 6, 7. 
1838. Strophodus angustissimus, L. Agassiz, Poiss. Foss. vol. iii. p. 128, 
pi. xviii. figs. 28-30. 
(P) 1838. Strophodus elytra, L. Agassiz, tom. cit. p. 128 b, pi. xviii. fig. 31. 
1849. Palceobates angustissimus , H. von Meyer, Paheontogr. vol. i. 
p. 233, pi. xxviii. figs. 14, 15. 
1861. Palceobates angustissimus, E. E. Schmid, Nova Acta Acad. Caes. 
Leop.-Car. vol. xxix. no. 9, p. 8, pi. i. figs. 4-15. 
1861. Palceobates ovalis, E. E. Schmid, loc.. cit. p. 9, pi. i. figs. 16-24 h 
1861. Palceobates acrodiformis, E. E. Schmid, loc. cit. p. 9, pi. i. 
figs. 25-27. 
(?) 1861. Palceobates angustus, E. E. Schmid, loc. cit. p. 7, pi. i. figs. 1-3. 
1865. Strophodus angustissimus, H. Eck, Form. bunt. Saudst. u. 
Muschelk. Obersclilesien, 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 Palceobates angustus may be distinct, but cannot 
yet be definitely separated. 
Form. Sf Log. Muschelkalk: Silesia, Thuringia, Bavaria, AYiirtem- 
berg, SaxeAYeimar, Alsace-Lorraine, and Eastern France. Upper 
Bunter : Bhenish 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. Enniskillen Coll. 
1 Another tooth from the Muschelkalk, probably of Palceobates , is named 
Strophodus ovalis, C. Gr. G-iebel, Fauna d. Yorw., Fische (1847), p. 330. 
