t 
200 SELACHII. 
F. M‘Coy, Ann. Mag. Nat. Hist. [2] vol. ii. (1848), p. 129 ; 
and Brit. Palseoz. Foss. 1855, p. 638, pi. 3 g. fig. 10.—Upper 
Carboniferous Limestone; Derbyshire. 
Deltoclus angustus, Newberry & Worthen, op. cit. vol. iv. p. 368, 
pi. iii. fig. 7 : Deltodopsis angustus , St. John & Worthen, 
Pal. Illinois, vol. vii. pp. 160, 163, pi. xi. figs. 7-10.— 
Chester Limestone ; Illinois. 
Deltoclus cinctulus, St. John & Worthen, Pal. Illinois, vol. vii. 
(1883), p. 146, pi. ix. figs. 6, 7.—Warsaw Limestone; 
Missouri and Illinois. 
Deltoclus cinctus, J. S. Newberry, Ann. Hep. Geol. Surv. Indiana, 
1876-78 (1879), p. 344.—St. Louis Limestone; Indiana. 
Deltoclus cingulatus , Newberry & Worthen, op. cit. vol. ii. p. 99, 
pi. ix. fig. 6.—Chester Limestone ; Illinois.*’’ 
Deltoclus circinans i Poeciloclus circinans, H. Trautschold, Mem. Soe. 
Imp. Nat. Moscou, vol. xiv. (1879), p. 52, pi. vii. fig. 1.— 
Carboniferous Limestone ; Government of Moscow. 
(?) Deltoclus contortus : Tamiodus contortus , St. John & Worthen (ex 
L. G. de Koninck, MS.), op. cit. vol. vii. (1883), p. 76.— 
Lower Carboniferous Limestone ; Vise, Belgium. 
(?) Deltoclus fascicitus, Newberry & Worthen, op. cit. vol. iv. (1870), 
p. 366, pi. iii. fig. 17 : Tcenioclus fa[s]ciatus ?, St. John & 
Worthen, op. cit. vol. vii. (1883), p. 76, pi. xiii. fig. 9.— 
Keokuk Limestone ; Illinois. 
Deltoclus grandis : Poeciloclus grandis , H. Trautschold, loc. cit. 
vol. xiv. (1879), p. 51, pi. vi. fig. 13.—Carboniferous 
Limestone; Government of Moscow. ? ~ <?-* -. 
Deltoclus incrassatus , H. Trautschold, loc. cit. vol. xiv. p. 54, 
pi. vii. fig. 5.—Carboniferous Limestone ; Government of 
Moscow. 
Deltoclus intermeclius, St. John & Worthen, op. cit. vol. vii. p. 153, 
1)1. ix. figs. 14, 15.—St. Louis Limestone ; Iowa, Illinois. 
(?) Deltoclus laminaris, II. Trautschold, loc. cit. vol. xiv. (1879), 
pi. vii. fig. 6 : Cochliodus laminaris , H. Trautschold, loc. 
cit. vol. xiii. (1874), p. 291.—Carboniferous Limestone ; 
Government of Moscow. 
Deltoclus Icitior , St. John & Worthen, op. cit. vol. vii. p. 145, pl.ix. 
figs. 11, 12.—Keokuk Limestone; Illinois and Iowa. 
Deltoclus littoni , Newberry & Worthen, op. cit. vol. iv. p. 367, 
pi. iv. fig. 8; and St. John & Worthen, op. cit. vol. vii._ 
p. 149.—Lower Carboniferous ; Missouri. /V? //J 
Deltodus mercurei , J. S. Newberry, in Hep. Expl. Exped. from Santa 
Fe, New Mexico, to Colorado, 1876, p. 137, pi. iii. fig. 1; 
