Regional,Layer, and Cell-Type-Specific Connectivity of the Mouse Default Mode Network

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Gabrb3 is required for the functional integration of pyramidal neuron subtypes in the somatosensory cortex

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Topographical organization of mammillary neurogenesis and efferent projections in the mouse brain

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A hairy business—Periostracal hair formation in two species of helicoid snails (Gastropoda,Stylommatophora, Helicoidea)

In molluscs, the calcareous shell is covered externally by a thin organic layer, the periostracum. The periostracum of some pulmonate species is of special taxonomic interest because it bears distinct microscale architectures. Where and how these structures are formed is as yet unknown. Using histological sections through their shells, gelatin cuts, and live observations I studied the pattern by which the periostracal hair‐like projections in two helicoid land snail species are secreted and evenly arranged on the shell. The results indicate a complex mechanism: a hair is formed in the periostracal groove independently of the periostracum, after which it is attached to the edge of the shell, drawn out of the tissue, and finally swivelled to the upper side of the periostracum. Upon further growth of the periostracum, the hairs are finally fixed upright on the shell. J. Morphol. 2011. © 2011 Wiley‐Liss, Inc.     

Comparison of airborne pollen levels in Switzerland at four recording stations in Davos,Lucerne, Nyon and Basle during 1989

Pollen data collected in 1989 and recorded from four stations in Switzerland (Basle, Davos, Nyon on Lake Geneva and Lucerne in central Switzerland) are presented and compared as flowering calendars. The data highlight the importance, for production of a pollen calendar over the whole country, of the fact that the beginning and duration of flowering occur at different times at the four stations.