. Bulletin of the British Museum (Natural History), Geology. 232 LOWER CARBONIFEROUS TRILOBITES. One Centimet re Fig. 2. Spatulina spatulata (Woodward). Reconstruction. terminating in a high, blunt, rounded end. Axial furrow distinct. 8 or more faintly defined axial rings, bearing faint traces of interior of paired pygidial muscle impressions. Pleural regions gently inflated, fall away rapidly behind ; narrow, gently raised rim with an indistinct border furrow. Pleural furrows very faint. Remarks. As indicated by Osmolska (1962 : 180) the differences between S. spatulata and Cystispina cystisp
. Bulletin of the British Museum (Natural History), Geology. 232 LOWER CARBONIFEROUS TRILOBITES. One Centimet re Fig. 2. Spatulina spatulata (Woodward). Reconstruction. terminating in a high, blunt, rounded end. Axial furrow distinct. 8 or more faintly defined axial rings, bearing faint traces of interior of paired pygidial muscle impressions. Pleural regions gently inflated, fall away rapidly behind ; narrow, gently raised rim with an indistinct border furrow. Pleural furrows very faint. Remarks. As indicated by Osmolska (1962 : 180) the differences between S. spatulata and Cystispina cystispina are sufficient to warrant their generic separa- tion. These differences are in the shortness of the preglabellar field, the non- tapering glabella, and the narrow fixigenae in S. spatulata. On the other hand, the distinctness of the glabellar furrows is not a point of difference, as in both genera these are clear on the internal mould and indistinct on the interior (and presumably on the dorsal exterior) of the carapace. The pygidia of the two genera are also very similar. From S. longispina sp. nov. (see below) S. spatulata differs in the shape of its spines and its parallel-sided glabella ; from S. nasifrons (R. & E. Richter 1949) it differs in that the latter species has a more prominent, slightly constricted glabella and (fide Osmolska 1962 : 180, text-fig. 5/) a very broad spine. Spatulina longispina sp. nov. PL 6, figs. 1-4 ; Text-fig. 3. 1895 Griffithides longispinus Portlock ; Woodward : 647, pi. 28, fig. 6. 1960 Phillibole (? Cystispina) sp. nov. Prentice : 271, pi. 12, fig. 2. Diagnosis. Moderately large Spatulina with long, hollow, pointed librigenal spines. Glabella slightly Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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