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In the course of two trips to Central America (June 1967 and JulyAugust 1976) I had the opportunity of collecting topotypic specimens of Planorbis nicaraguanus Morelet, 1849, anatomically defined in this paper, and of P. yzabalensis Crosse & Fischer, 1879, the identity of the latter with Drepanotrema anatinum (Orbigny, 1835) is confirmed. The following planorbid species were also found: Helisom...

We give a short presentation of the Czech philosopher Karel Vorovka (1879-1929) ’s work in philosophy of science, followed by the translation of a conference on Vorovka by Bohuslav Hostinský and of aVorovka’s

The Cambridge Greensand Member (lower Cenomanian: Upper Cretaceous) has yielded a diverse fauna of terrestrial and marine tetrapods, whose remains are largely reworked from the underlying Gault Formation (upper Albian: Lower Cretaceous). Here, we re-describe two non-avian dinosaur taxa named this unit, ‘Eucercosaurus tanyspondylus’ Seeley, 1879 ‘Syngonosaurus macrocercus’ 1879, both which have ...

martin kirschner (1879-1942), versatile german surgeon who had his scientific research and academic interests addressed topics which are covered by several specialities such as general surgery, orthopaedic surgery, neurosurgery, anesthesiology and plastic surgery. he also was the editor of five medical journals and autjor of 249 articles and eight textbooks. his greatest and lasting contributio...

Morphometric Study of the Genus Panstrongylus Berg, 1879 (Hemiptera, Reduviidae, Triatominae) The subfamily Triatominae is actually represented by 137 species distributed among 6 tribes and 19 genera. Within this subfamily, the genus Panstrongylus, Berg 1879, is composed by 13 species widespread in sylvatic, peridomestic, and domestic habitats of Neotropical regions. These species are vectors o...