GONIATITES. 



CEPHALOPODA. 



247 



rounded lateral lobes ; aperture wide nnd deep. Greatest di- 

 ameter two inches, thickness nine lines. 



This rare Goniatite is found at High-Green Wood, near 

 Hebden Bridge, Vale of Toduiorden, Yorkshire. 



3. GoNUTiTEs SDBSULCATUs.— The Half-Furrowed Gonia- 

 tites, pi. XXI.* figs. 8, 9, 10. 



G. subsulcatiis. Brown, Tr. Man. Geo. Soc. I. p. 214, pi. 7, 

 figs. 9, 10. 



Sub-rotund ; ambit broad, sub-depressed, with a deep sulcus 

 in its centre; constrictions wide, nearly equi-distant, rather 

 deep, plain, rounded, narrow, below them on the surl'ace smooth, 

 and arcuated as they pass over the ambit ; surface covered with 

 transverse, strong, bifurcate, gently bending striae, which ema- 

 nate from the umbihcus, where they are strong, the bifurcations 

 terminating on the margin of the doreal sulcus ; umbilicus 

 rounded, rather wide ; aperture semi-lunar and rather small ; 

 dorsal lobe short, the whole lateral lobes rounded. Diameter 

 five lines, thickness three lines. 



Found in nodules of Limestone Shale, in the neighbourhood 

 of Hebden Bridge. Eare. 



4. GoNiATiTES DORSAiis. — The Backridged Goniatites, pi. 

 35^1.* figs. 11, 12, 13. 



G. Borsalis. Brown, Tr. Man. Geo. Soc. I. p. 214, pi. 7, 

 figs. 11, 12, 13. 



Discoidal, sub-compressed ; ambit somewhat flattened, and 

 sub-carinated in the centre ; aperture longer than wide ; whole 

 shell covered by numerous, fine, acute, transveree striae, thick 

 as they emanate from the umbilicus, and become bifurcate a.s 

 they diverge outwards, and are abruptly arcuated as they pass 

 over the side towards the ambit ; these are crossed by rather 

 •wide-set, spiral, and nearly obsolete strite ; constrictions irregu- 

 lar, shallow, and striated, and considerably arcuated, as they 

 approach the ambit ; septa with two rounded lateral lobes ; one 

 pointed lateral sinus, and a simple, rounded, central dorsal 

 lobe. Diameter seven lines, thickness about one line and a half 



Found in nodules of Limestone Shale, at High- Green Wood, 

 Vale of Todmorden. 



5. Goniatites jugosus. — The Ridged Goniatites, pi. 

 XXL* figs. 14, 15. 



G.jttfjosus. Brown, Man. Geo. Tr. I. p. 215, pi. 7, f. 14, 15. 



Discoidal ; with five gradually enlarging volutions, crossed 

 by numerous, elevated, sharp, strong, oblique ribs, which ema- 

 nate from the umbilicus, and become bifurcate, or trifurcate. 

 gradually thickening as they approach the ambit, terminating 

 in a gentle cur^'c on the margin of the broad, smooth, dorsal 

 sulcus with which the slightly-rounded ambit is invested ; the 

 sides of the shell rise abruptly, and have a carinated aspect ; 

 constrictions irregular, shallow, and partaking of tlie same cur. 

 vature as the ribs ; aperture compressed and semi-lunar ; um- 

 bilicus veiy small and shallow ; doreal lobe of the septa narrow, 

 truncate, with parallel sides, lateral lobes, and sinuses rounded. 

 Diameter three lines, thickness one line and a half. 



This species has somewhat the aspect of G. Gihmni, but differs 

 in the dorsal groove being smooth, and in the form of the septa. 



A rare species, found in the Limestone Shales in the neigh- 

 bourhood of Hebden Bridge. 



0. Goniatites splendidus. — The Splendid Goniatites, pi. 

 XXL* figs. 16, 17, 18. 



G. splendidus. Brown, Man. Geo. Tr. L p. 215, pi. 7, figs. 

 10, 17, 18. 



Discoidal, smooth, glossy ; inner volutions enveloped in 

 the outer one ; umbilicus minute ; ambit subacute ; aperture 

 large, wide, oblong-ovate ; surface covered with sigmoidal striae ; 

 septa numerous, the dorsal lobe long and truncate, with the 

 sides parallel ; dorsal sinuses trifid, with the first lobe very 

 long, and rounded ; second acute ; third short, and obtusely 

 angular ; lateral sinuses very wide, divided into two parts by a 

 very deep acute lobe, the first part bifid, the second rounded. 

 Diameter nearly half an inch, thickness a quarter. The young 

 form is unknown. 



Found at High-Green Wood, near Hebden Bridge, and is 

 in the cabinet of Mr. Gibson. 



7. Goniatites Kenyoni. — Kenyon's Goniatites, pi. XXL* 

 figs. 19, 20. 



G. Kenyoni. Brown, Tr. Man. Geo. Soc. L p. 216, pi. 7, 

 figs. 19, 20. 



Somewhat ovate, compressed, smooth, the outer volution 

 enveloping the others ; ambit rounded, with a thin sharp carina 

 along its centre ; umbilicus small, shallow ; surface covered 

 with very minute, spiral striae, which can only be detected by 

 the aid of a strong lens ; septa numerous, with rounded lobes 

 and sinuses ; latertJ sinus wide, double ; dorsal sinus simple. 

 Diameter two lines and a half, thickness a third less. 



This species differs from G. Looiiciji in its dorsal sinus being 

 simple; and from G. Gilbertsoni in having double lateral 

 sinuses, and in the dorsal sinus being simple ; and from both 

 in being spindly striated. 



Found in the Limestone Shales, near Hebden Bridge. 



8. Goniatites taradcxicus.— The Paradoxical Goniatites, 

 pi. XXL* figs. 21, 22. 



G. Paradoxicus. Brown, Tr. Man. Geo. Soc. I. p. 216, pi. 

 7, figs. 21. 22. 



Elliptical, sub-depressed, smooth, shining; aperture sub- 

 rotund ; umbilicus of moderate size, shallow, the sides gradually 

 rising from it ; ambit sub-compressed, gently rounded ; surface 

 covered with very minute spiral strife ; septa with rounded 

 lobes and sinuses ; the dorsal sinus double, lateral sinus simple. 

 Diameter two lines, thickness a line and a half. 



Distinguished from the G. Kenyoni by the form of its scptjt : 

 and from the G. Gilberlsoni in being spirally striated. 



Found in the Shale at the bottom of High-Green Wood, Vale 

 of Todmorden. 



9. Goniatites Longthorxi. — Longthom's Goniatites, pi. 

 XXL* figs. 24, 25, 26. 



