CLADOBONTIDiE. 
27 
Genus PMCCHODUSj St, John & Worthen. 
[Pal. Illinois, vol. vi. 1875, p. 251.] 
Syn. Bathy cheilodus , St. John & Worthen, Pal. Illinois, vol. vi. 1875, 
p. 252. 
Teeth very similar to those of Cladodus, but having the outer 
lateral cones as large as, or larger than, the median cone. Inter¬ 
mediate cones, one, two, or three in number, very small. 
Phoebodus soyohice, St. John & Worthen, tom. cit. p. 251, pi. i. 
fig. 14.—Middle Devonian ; Iowa. 
Phoebodus macisaacsii: Bathycheilodus mcisciacsii , St. John & 
Worthen, tom . cit. p. 252, pi. i. figs. 12, 13,—Middle 
Devonian; Iowa. Cl 
Phoebodus spring eri 1 : Pristicladodus sjj ringeri , St. John & Wor- 
then, tom. cit. p. 255, pi, i. figs. 7-11.—Kinderhook 
Limestone; Iowa. 
Genus XjAMBDODTJS? St. John & Worthen. 
[Pal. Illinois, vol. vi. 1875, p. 280.] 
Teeth small, similar to those of Cladodus , but destitute of lateral 
cones. 
Lambclodus calceolus, St. John & Worthen, tom. cit. p, 281, pi. v, 
fig. 5.—Burlington Limestone; Iowa, Illinois. 
Lambclodus costatus , St. John & Worthen, tom. cit. p. 280, pi. v. 
fig. 3.—Burlington and Keokuk Limestones; Iowa, Illinois, 
Missouri. 
Lambdoclus hamulus , St. John & Worthen, tom. cit. p. 283, pi. v. 
fig. 26.—Chester Limestone ; Illinois. 
Lambdoclus reflexus, St. John & Worthen, tom. cit. p. 284, pi. v. 
fig. 25.—Chester Limestone ; Illinois. 
Lambdodus robustus, St. John & Worthen, tom. cit. p. 282, pi. v. 
fig. 6.— Keokuk Limestone; Iowa, Illinois, Missouri. 
Lambdodus transversus , St. John & Worthen, tom. cit. p. 282, 
pi. v. fig. 4. — St. Louis Limestone; Illinois. 
1 S. Garman (Bull. Mus. Comp. Zool. Harvard Coll. yoI. xii. no. 1, 1885, 
p. 6) proposes the generic name of Pternodus for this species. This, however, 
seems unnecessary, and the term has already been occupied by K. Owen (Trans. 
Odontol. Soc. 1867) for a supposed Carboniferous genus. 
