Catillus. 
CONCHIFEBA. 
167 
Inoceramus sulcatus . Sowerby, III. p. 184-, pi. 306. 
Oblong, inequivalve, beaks prominent, that of one valve in¬ 
curved and acute; surfaco with about nine large longitudinal 
plaits. 
The Chalk Marl, Cambridge and Beerbead ; and the Gault, 
Foikstone, Ringmer, Maidstone, and Yale of Wardour. 
14. Catillus obliquatus. —The Oblique Catillus, pi. 
LXVII. fig. 23. 
C. ohliqnatus. Brown, Trans. Manch. Geo. Soc. I. p. 226, 
pi. 7, fig. 69. 
Ovate, smooth ; umboues rather large, and placed consider¬ 
ably to one side ; surface with several distinct lines of growth; 
sides unequal, one considerably produced, the other short and 
nearly straight. 
Carboniferous Limestone Shale, High-Green Wood, Yale of 
Todmorden. 
15. Catillus LjEvis. —The Smooth Catillus, pi. LXVII. f. 22. 
C. Iwcis. Brown, Trans. Manch. Geo. Soc. Trans. I. p. 
226, pi. 7, fig. 67. 
Oblong-ovate, smooth; with numerous concentric, nearly 
obsolete wrinkles; umbones small, rounded, and but slightly 
produced. Length nearly three-fourths of an inch; breadth 
half an inch. 
The Carboniferous Limestone Shale, High-Green Wood, 
Vale of Todmorden. 
16. Catillus Kirkmani. —Kirkman's Catillus, pi.LXVII. 
fig. 24. 
C. Kirkmani . Brown, Trans. Manch. Geo. Soc. I. p. 225, 
3 > 1 . 7, fig. 66. 
Oblong-ovate, convex, smooth ; sides nearly equal, marked 
with four concentric lines of growth ; umbones prominent, 
central, and rounded, with several iiiequidistant, concentric 
lines of growth ; margins sharp and even. 
The Carboniferous Shale, liigh-Green Wood, Vale of Tod- 
anorden. 
17. Catillus costatus. —The Ribbed Catillus, pi. LXVII. 
fig. 25. 
C\ costatus . Brown, Trans. Manch. Geo. Soc. I. p. 226, 
pi. 7, fig. 68. 
Oblong-ovate; with numerous very fiat, longitudinal, diver¬ 
gent small ribs emanating from the umbones and terminating 
on the margins; these are crossed by numerous distinct lines 
of growth. Length half an inch; breadth, three-eighths. 
18. Catillus Kellyii. —Kellys Catillus, pi. LXVIII. 
fig. 17. 
C. Kellyii . Brown, Trans. Manch. Geo. Soc. I. p. 226, pi. 
7, fig. 73. 
Mytilliforin, elongated, smooth, with concentric lines of 
growth ; umbones small, rounded, and considerably turned to 
one side; valves narrow above, wide and rounded towards the 
base. 
I he Carboniferous Limestone Shale, Iligh-Green Wood, 
Vale of Todmorden. 
19. Catillus minutus. —The Minute Catillus, pi. LXVIII. 
figs. 18, 19. 
C. minutus . Brown, Trans. Manch. Geo. Soc. p. 220, pi. 7, 
figs. 71, 72. 
Modioliform, much elongated, smooth, with distinct, con¬ 
centric lines of growth; umbones small, rounded, and placed 
to one side. Length about one line; breadth two-thirds its 
length. 
The Carboniferous Limestone Shale, High-Green Wood* 
Vale of Todmorden. 
20. Catillus Crispii. —Crisp's Catillus, pi. LXL *** f. 8,9. 
C. Crispii. Mantell, Goo. Sus. I. p. 133, pi. 27, fig. 11. 
Obovate, greatly compressed, with numerous transverse 
ridges ; beaks acuminated ; posterior side small, depressed ; 
anterior side expanded ; binge-lino oblique. 
In the Red Chalk, II unstanton, and the Gault, Foikstone 
and Ilainsey. 
21. Catillus Lamarckii.—L amarcks Catillus, pi. LXI.*** 
Inoceramus Lamarckii. Mantell, Geo. Suss. p. 214, pi. 27, 
fig. 1. 
Valves equal, very convex, with a few obscure longitudinal 
undulations, and distant transverse ridges; surface covered 
with numerous concentric stria?; posterior side sub-com¬ 
pressed or slightly concave ; anterior side lobate and expanded, 
separated from the body of the valve by a deep furrow ; liiuge- 
line nearly transverse. 
In the Chalk, Lowes and Norfolkshire. 
22. Catillus trigonus. —The Trigonal Catillus. 
Inoceramus trigonus . Portlock, Geo. Sur. p. 422, pi. 33, f. 4. 
Much elongated, nearly three-sided, compressed ; the flat¬ 
tened arch strongest at the beak ; beaks rather sharp, and re¬ 
flected towards the hinge-lino; surfaco with irregular, concen¬ 
tric wrinkles, between each a series of fiue striae; hinge-line 
greatly oblique and extending downwards, being equal to 
nearly half tlio length of the shell, and broadest at the end of 
the hinge-line. 
Silurian Limestone, Tyrone, Ireland. 
23. Catillus contortus. —The Contorted Catillus. 
Inoceramus contortus . Portlock, Geo. Sur. p. 422, pi. 33, 
fig. 5. 
Elongated; hinge-line short; beaks incurved; the entire 
shell much arcuated, giving it a twisted appearance; surface 
with fine concentric wrinkles and stria?. 
Siluriau Limestone, Tyrone, Ireland. 
24. Catillus tenuis. —The Thin Catillus. 
Inoceramus tenuis. Mantell, Geo. Suss. p. 132. 
Both valves regularly convex and deepest in the middle ; 
beaks convex, incurved ; hinge-line short, rather oblique ; pos¬ 
terior side small and lutiulate; surface with numerous lamel- 
lated, concentric wrinkles, generally about four inches long, 
and three wide; substance of the shell thin. 
25. Catillus transversus.—T he Transverse Catillus. 
Inoceramus trans versus. Portlock, Geo. Sur. p. 423, pi. 33, 
fig- 1 L 
Transversely elongated, considerably flattened, but more 
inflated towards the beaks; hinge-line long, straight, horizon¬ 
tal ; beaks placed towards the end, and rather indistinct; sur¬ 
face with shallow concentric undulations. 
Silurian Limestone, Tyrone, Ireland. 
26. Catillus pernoides.— The Perna-liko Catillus. 
Inoceramus pernoides . Portlock, Geo. Sur. p. 567, pi. 38, f. 5. 
Elongated; hinge-line considerably oblique, forming ari 
angle of thirty degrees; beaks acute, and slightly curved, 
smooth. 
The Carboniferous Limestone, Derryloran, Ireland. 
