30 
MOLLUSCA. 
Goniatites, 
umbilicus ; outer volution obsoletely striated transversely ; 
constrictions nearly direct; umbilicus very wide, deep, and 
acute, with the edges plaited, crenated, ordentated ; provided 
with a double dorsal lobe, an angular deep dorsal sinus ; first 
lateral lobe ample ; an extremely round, angular, deep lateral 
sinus. 
In the young state the transverse striae are very distinct, but 
become nearly invisible ; when old, the septa vary but slightly ; 
in the young and old shells, only, the angles are blunted. 
This handsome Goniatite is by no means rare, for it is 
found near Sheffield, Halifax, Colne, and Holmsfrith, Saddle- 
worth. 
18. G. TituNCATUS.—The Truncated Goniatite, pi. XXI. 
fig. 35, 36. 
Goniatites tnmeatus . Phillips, Geology of Yorkshire, II. 
p. 234, pi. 19, fig. 20, 21. 
Discoidal, umbilicate, much compressed; inner volutions 
entirely concealed ; sides covered with transverse, strong, 
bent striae, which do not all extend from the margins to the 
back, but have from two to three intermediate ones, betwixt 
the longer striae; ambit in adult shells flattened ; aperture 
elongated, narrowed next the ambit; and the contiguous 
volution intruding about one-third its length. 
Found at Bolland. 
19. G. carina. — The Keeled Goniatite, pi. XXI. fig. 
37, 38. 
Goniatites carina. Phillips, Geology of Yorkshire, II. 
p. 237, pb 20, fig. 63, 64. 
Lenticular; smooth, ambit provided with a sharp keel; 
aperture subcordate. 
Found at Bolland, Queen’s County, Ireland. 
20. G. vittjger -The Filleted Goniatite, pi. XXL 
fig. 39, 40. 
Goniatites viltiger . Phillips, Geology of Yorkshire, II. 
p. 237, pb 20, fig. 59, 60. 
Lenticular; carinated ; with five smooth two-thirds con¬ 
cealed volutions ; ambit provided with a flattened carina. 
Found at Bolland, Queen’s County, Ireland. 
21. G. reticulatus. —The Reticulated Goniatite, pi. XXI. 
fig. 41, 42. 
Goniatites reticulatus . Phillips, Geology of Yorkshire, II. 
p. 235, pi. 19, fig. 26 to 32. 
Discoidal, compressed, in the adult state, umbilicate; 
inner volutions entirely concealed ; sides of outer volution 
crossed by numerous strong, bent striae, which emanate from 
the inner margin of the volutions and before reaching the 
ambit bend suddenly backwards; these are crossed by rather 
wide spiral striae which produces a somewhat reticulated 
appearance; umbilicus, large, deep, and angular; ambit 
angulated ; septa with a short dorsal lobe, the first laterals 
rounded, large, with their dorsal edges parallel; constrictions 
greatly bent. 
1 he young shell is subglobose, with a rounded umbilicus, 
and the outside with radiating furcate stria? crossed by fine 
spiral stria?; the constrictions much bent, in adult speci¬ 
mens the cast of the inside is considerably undulated. 
Found at Flasby, Marsden, Wvcrsdale, Holmfrith and 
High-Green \\ ood. 
22. G. crknistiu/e;.—T he Crenulated-Striate Goniatite, 
pi. XXI. fig. 44 and 49. 
Goniatites crcnistrioe. Phillips, Geology of Yorkshire, II. 
p. 234, pi. 19. fig. 7, 8, 9. 
Subglobose, umbilicate; inner volutions entirely con¬ 
cealed ; sides with fine crenulated, reticulated, elegantly 
curved striae; the longer ones emanating from the inner 
margins, and passing over the ambit, proceed continuously 
to the margins of the opposite side; these have from one to 
three intermediate shorter stria? betwixt them; umbilicus 
very small and rounded; septa with the dorsal lobe bifid ; 
dorsal sinus acute; first lateral lobe sub-acute, double the 
length of the dorsal lobe; second lateral lobe obtusely roun¬ 
ded, shorter than the first; marginal sinus angular. 
Some varieties are more globose than our figure. 
Found in the Isle of Man, Bolland, Queen’s County, and 
Fermanagh, Ireland. 
23. G. spirorbis. — The Winding Goniatite, pi. XXI. 
fig. 45, 46. 
Goniatites spirorbis . Phillips, Geology of Yorkshire, II. 
p. 237, pi. 20, fig. 51 to 55. 
Discoidal ; with seven or eight, rounded or oval, half 
exposed, compressed volutions ; coiled in the manner of a 
watch spring, crossed by extremely fine slightly oblique 
stria?, and divided by a deep angulated suture; aperture 
longitudinal, oblong-ovate, slightly indented by the last 
volution ; septa with two rounded lateral sinuses, and an 
acute central dorsal sinus. 
I 11 the young state this species is nearly globular, with a 
semilunar, transverse aperture. 
Found at Black Hall, Bolland, Queen’s County, Ireland. 
24. G. stenolobus. —The Narrow Lobed Goniatite, pi. 
XXI. fig. 47, 48. 
Goniatites stenolobus. Phillips, Geology of Yorkshire, II. 
p. 235, pi. 20 , fig. 7 , 8 , 9. 
Subglobular, umbilicate; inner volutions entirely con¬ 
cealed, outside covered with minute rugosities, and direct 
constrictions ; umbilicus of moderate size ; lobes and sinuses 
of the suture rounded ; dorsal lobe narrow. 
Found at Bolland, Queen’s County, Ireland. 
25. G. excavatus. —The Excavated Goniatite, pi. XXI. 
fig. 49, 50. 
Goniatites excavatus. Phillips, Geology of Yorkshire, II. 
p. 235, pi. 19, fig. 33, 34, 35. 
Depressed, umbilicate ; inner volutions entirely concealed ; 
ambit angulated ; sides with somewhat crenulate transverse, 
undulating slightly furcated stria?, which curve suddenly 
as they pass over the ambit; constrictions considerably 
waved ; umbilicus large and acute ; lateral sinuses as in G. 
reticulatus , No. 21, but more acute. 
The young shells are destitute of spiral striae. 
Found at Bowes, Bolland, Queen’s County, Ireland, and 
also at Flasby. 
Professor Phillips thinks it possible that this may be only 
a variety of Goniatites reticulatus. 
26. G. obtlsus. —The Obtuse Goniatite, pi. XXI. fig. 51, 
52, and 57- 
Goniatites obtusus. Phillips, Geology of Yorkshire, Ii. 
p. 234, pi. 19, fig. 10, 11, 12, 13. 
Subglobose, umbilicate; inner volutions wholly concealed ; 
sides flattened, covered with delicate, transverse, elegantly 
bent and furcate striae which sweep backwards as they pass 
over the broad and rounded ambit; there are also a few 
faint longitudinal stria*, and some internal slightly bent 
ridges; aperture oblong-ovate ; narrowed behind the body, 
volution intruding upon it about one-third, and the internal 
