166 Scientific Intelligence. 



New Mexico, is described by E. Waller and A. J. Moses. It has 

 a hardness of about 5, gray color and black streak. An analysis, 

 after deducting 4*56 of SiO„ and 8 - 38 silver gave the results be- 

 low ; these correspond to RAs 3 with R = Ni : Co : Fe = 4 : 2 : 1, 

 or skutterudite in which the cobalt is largely replaced by nickel. 



As Ni Co Fe 



73-67 ]2"25 6-16 2'92 = 100 



— School of Mines Quarterly, vol. xiv, No. 1. 



Hauchecornite is a nickel-bismuth mineral described by 

 Scheibe from the Friedrich mine in the Hamm mining district, 

 Germany. It occurs in tetragonal crystals and massive of a 

 light bronze-yellow color; hardness 5, specific gravity 6*4. 

 Analyses by R. Fischer and others gave discordant results be- 

 cause of the want of homogeneity of the material, but the conclu- 

 sion is reached that the composition is essentially Ni(Bi,Sb,S). 

 — Jalirb. Preus. Geo I. Landesaustalt, 1891, p. 91. 



Cuprocassiterite. — A note upon this supposed new tin mineral 

 from the Black Hills is given by Titus Ulke in the Transactions 

 of the American Institute of Mining Engineers ; a further critical 

 investigation is given by Headden on p. 108 of this number. 



11. Large Variations in the Metamorphosis of the same 

 species. — An elaborate memoir entitled, The Embryology and 

 Metamorphosis of the Macroura, by W. K. Brooks and F. H. 

 Herrick, makes 140 pages quarto of the fifth volume of the 

 Memoirs of the U. S. National Academy of Sciences, and is 

 illustrated by 57 plates. The species microscopically investi- 

 gated and here reported upon are of the genera Gonodactylus 

 Alpheus and Stenopns. The authors mention, in the introductory 

 pages, as one remarkable result of their study of the genus 

 Alpheus, the discovery that while the" larval stages of different 

 species are similar, the individuals of a single species sometimes 

 differ more from each other as regards their metamorphoses than 

 the individuals of two very distinct species, and make on this 

 point the following remarks : 



This phenomenon has been observed by us and carefully 

 studied in two species — Alpheus heterochelis and Alpheus Saulcyi 

 — and it is described in detail, with ample illustrations, in the 

 chapter on the metamorphosis of Alpheus. In the case of the 

 first species the difference seems to be geographical, for while all 

 the individuals which live in the same locality pass through the 

 same series of larval stages, the life history of those which are 

 found at Key West is very different from that of those which 

 live on the coast of North Carolina, while those which we studied 

 in the Bahama Islands present still another life history. In the 

 case of the second species — Alpheus Saulcyi — the difference stands 

 in direct relation to the conditions of life. The individuals of 

 this species inhabit the tubes and chambers of two species of 

 sponges which are often found growing on the same reef, and the 

 metamorphosis of those which live in- one of these sponges is 



