. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Fig. 9. Liomesaspis laevis Raymond. An unusually well preserved indi- vidual, except for the telson. The holotype. x Fig. 10. The same species. A thoracetron, exposing the lower surface. At the posterior end are processes for articulation with the telson. Yale Univ. Mus., no. 16915. x 2. The thoracetron, on the other hand, is commonly well preserved. The axial lobe is narrow, but expands at the posterior end where it rises into a high blunt spine. On the best preserved specimens this spine is excavated behind, ha
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Fig. 9. Liomesaspis laevis Raymond. An unusually well preserved indi- vidual, except for the telson. The holotype. x Fig. 10. The same species. A thoracetron, exposing the lower surface. At the posterior end are processes for articulation with the telson. Yale Univ. Mus., no. 16915. x 2. The thoracetron, on the other hand, is commonly well preserved. The axial lobe is narrow, but expands at the posterior end where it rises into a high blunt spine. On the best preserved specimens this spine is excavated behind, having exactly the same shape as in Euproops danae. The best preserved axial lobes show three complete rings and a half-ring in front of the terminal enlarged portion, but the transverse furrows are so shallow that the lobation is not conspicuous. As a rule it shows better on the cast of the interior of the shell than on the exterior. Three pairs of short linear grooves indicate the position of the entopophyses. The lateral lobes are smooth, flat on the upper anterior surfaces, abruptly turned downward at the sides and back. The telson is long and slender, slightly over two-fifths of the total length in the two specimens in which it has been possible to excavate the whole of it. Two processes extending backward from the underside of the thoracetron prevented its being turned downward, hence it was. 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology
