420 Journal of Applied Microscopy. 



Sperrylite, Occurrence of, in North Carolina. Found in nugget-like masses and cubo- 

 W. E Hidden. Am. Jour. Sci., 4, 6: octahedral crystals, with rounded edges 

 381, 1878. < .' *= 



(not by abrasion), in old alluvial gravel 



with gold, etc. Occurrence of this rare mineral widespread in vicinity of Caler 

 Fork, Cowee Creek, Macon county. Not found in situ yet, but indications point 

 towards its discovery along the pyritous belt of western North Carolina. 



L. McI. L. 



Tantalite, Crystallized, from Paris, Me. C. H. Material not well adapted for crystal- 

 Warren. Am. Jour. Sci., 4, 6: 123, i8q8. , 1 • ^ 1 1 ^ r r ^1 



lographic study, but forms of crystals 



recorded. Contains iron instead of the manganese found in previously described 



crystals. l. McI. l. 



Tapiolite, Crystallized from Topsham, Me. C. Forms of crystals recorded. Essen- 

 H. ^Warren. Am. Jour. Sci., 4, 6: 121, ^j^n^ ^ tantalate, and contains very 



little niobium. 



Torbernite, The Crystalline Symmetry of. T. Cleavage plates, parallel to the perfect 



\i 8^^'^^'' ^""^ ''°'''' ^'''■' '^' ^' ^^' ^^^^^ cleavage, show two other fairly 



good cleavages (about at 90°), which 

 however are not equally perfect, as should be the case if the mineral were 

 tetragonal. These basal cleavage plates show, in addition, mono-symmetric 

 corrosion forms, which are symmetrical to the plane of second-best cleavage, 

 and also biaxial optical character with very small axial angle. 



Author concludes that torbernite, as well as antunite, is monoclinic (not 

 tetragonal), and that the uranite minerals form an isomorphous group. 



L. McI. L. 



Zircon, Twinned Crystals, from North Caro- Small gray to reddish-brown crystals, 

 Una. W. E. Hidden and J. H. Pratt. Am. ^^^^^ developed and doubly terminated, 

 Jour. Sci., 4, 0: 323, 1S98. _ '^ _ _ -^ _ 



showing a series of twins with twinning 



planes parallel to pyramids of first order (new to zircon). Five new twinning 

 planes identified. Found at Meredeth Freeman Zircon Mine, Henderson county. 



L. Mrl. L. 



NEUROLOGICAL LITERATURE. 



Edith M. Brace. 



Literature for Review should be sent to Edith M. Brace, Biological Laboratory, 

 University of Rochester, Rochester, N. Y. 



Apathy, S. Das leitende Element des Nerven- Investigations were made upon the ner- 

 systems und seine topographischen Bezieh- vous system of Hirudo, Lumbricus, 

 ungen zu den Zellen. Mittheil. aus der Zool. tt i- 1 1 • 1 1 



Station zu Neapel. 12: 495-749, Pis. 23- Helix, and other mvertebrates, and 



32, '897- upon the vertebrates Lophius, Rana, 



'Friton, and Lepus, the chief stains used being gold chloride, methylen-blue, and 



haimatein I A. He shows the-fibrillar nature of the conducting substance, and 



the continuity of the conducting primitive fibrils which are traced through 



