The non-avian saurischians that have associated eggshells and embryos are represented only by the sauropodomorph Massospondylus and Coelurosauria (derived theropods), thus missing the basal theropod representatives. We report a dinosaur clutch containing several crushed eggs and embryonic material ascribed to the megalosaurid theropod Torvosaurus. It represents the first associated eggshells an...

HIISTORIANS OF MEDICINE are a little perplexed about the "Museum, School, and Library" in ancient Alexandria. The names, at least, of eminent Hellenistic anatomists, physiologists and experimental pathologists of that period are known, and fragments from secondary sources on their achievements are available.' For centuries, Alexandria remained a great centre of learning, yet very little is know...

INTRODUCTION THE CLASSIFICATION of the eels of the family Ophichthidae is, as M yers and Storey (1939: 156) put it, in the utmost confusion . Their suggested solution, with which I heartily concur, is a sound anatomical study of all the included genera. This cannot be undertaken in the present paper as the family is of circum tropic al distribution and many of the genera are unavailable to me. ...

The skeletal record of tyrannosaurids is well-documented, whereas their footprint record is surprisingly sparse. There are only a few isolated footprints attributed to tyrannosaurids and, hitherto, no reported trackways. We report the world's first trackways attributable to tyrannosaurids, and describe a new ichnotaxon attributable to tyrannosaurids. These trackways are from the Upper Cretaceou...

The Osteographia of William Cheselden (1688–1752) is universally recognized as one of the most important and beautiful books in the British anatomical tradition.1 Cheselden had two principal goals in creating the Osteographia: to provide the most accurate study of the human skeleton to date and to create the most attractive atlas of osteology available. By common agreement, he succeeded in prov...

the head bones and relevant muscles are important elements composing the feeding and respiration apparatus and can be considered as highly important structures for giving rise to evolutionary specializations. the eels of the anguilloidei is a diverse group and structural diversity in their cranial musculoskeletal system is thus to be expected. ariosoma gilberti is a member of bathymyrinae (cong...