COCHLIODONIlD^. 
22'7 
Ududas mons-canxts, II. Trautschold, Nouv. Mem. Soc. Imp. Nat. 
Moscou, vol. xiii. (1874), p. 288, pi. xxviii. fig. 2. — 
Carboniferous Limestone ; !Mjatschkowa, Moscow. 
llehdus placenta, Newberry & Worthen, op. cit. vol. ii. p. 80, 
pi. V. fig. 4. — Kindorhook Limestone ; Iowa. 
Jlelodus polilus, Newberry & Worthen, op. cit. vol. ii. p. 79, 
pi. V. fig. 2. — Keokuk Limestone ; Illinois. 
llelodus pusillus : Polyrhizodus pusiUus, F. M‘Coy, Ann. Mag. 
Nat. Hist. [2] vol. ii. (1848), p. 126; and Brit. Palteoz. 
Foss. (1855), p. 612, pi. 3 k. fig. 2. — Lower Carboni- 
ferous Limestone ; Armagh. 
Helodns rttgosus, Newberry & Worthen, op. cit. vol. iv. (1870), 
p. 359, pi. ii. fig. 10. — Coal-Measures; Illinois. 
Helodus wuhdattis, Newberry & Worthen, op. cit. vol. ii. p. 82, 
pi. V. fig. 8. — Keokuk Limestone ; Illinois. 
Ilelodopsis ahhreviata, W. Waagen, Pal. Ind. [13] pt. i. (1879), 
p. 15, pi. i. fig. 6. — Productus Limestone ; Salt Range, 
India. 
Ilelodopsis elongata, W. Waagen, loc. cit. p. 14, pi. i. figs. 3, 4. — 
Productus Limestone ; Salt Range. 
Lophodus angularis, J. W. Davis, Quart. Journ. Geol. Soc. vol. xl. 
(1884), p. 628, pi. xxvii. fig. 25. — Yoredale Rocks; 
Wensleydale, Yorkshire. 
Lophodus contractus, L. G. de Koninck, Faune Calc. Carbf. Belg. 
pt. i. (1878), p. 33, pi. iv. figs. 4, 5. Hehdus contractus, 
H. Trautschold, Nouv. Mem. Soc. Imp. Nat. Moscou, 
vol. xiii. (1874), p. 270, pi. xxvi. fig. 10 (misprinted 
H. angustus). — Carboniferous Limestone ; Government of 
Toula, Russia, and Belgium. 
Lophodus irregularis, II. Romanowsky, Bull. Soc. Imp. Nat. 
Moscou, 1864, pt. ii.p. 161, pi. iii. fig. 21. — Carboniferous 
Limestone ; Government of Toula. 
Lophodus laneeolatus, H. Romanowsky, tom. cit. p. 162, pi. iv. 
fig. 22 ; L. G. de Koninck, Faune Calc. Carbf. Belg. pt. i. 
(1878), p. 36, pi. iv. fig. 12. — Carboniferous Limestone ; 
Government of Toula, Russia, and Belgium. 
Lophodus levis, J. W. Davis, Trans. Boy. Dublin Soc. [2] vol. i. 
(1883), p. 409, pi. U. figs. 26, 27 ; Quart. Journ. Geol. 
Soc. vol. xl. (18841, p. 627.— Yoredale Rocks ; Wensleydale, 
Lophodus linearis, H. Romanowsk)-, tom. cit. p. 162, pi. iv. fig. 26. 
— Carboniferous Limestone ; Government of Toula. 
Lophodus marginalis, H. Romanowsky, tom. cit. p. 161, pi. iii. 
fig. 20. — Carboniferous Limestone ; Government of Toula. 
Lophodus margodentatus, H. Romanowsky, tom. cit. p. 162, pi. iv. 
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