Reports and Proceedings — Zoological Society of London. 239 



2-357 for lithium light, the degree of accuracy being about 0-002. 

 More accurate values are anticipated when better prisms have been 

 prepared, but the results so far obtained suffice to show that the 

 doable refraction and colour dispersion are remarkably large in 

 amount. — Arthur Eussell : Notes on the Minerals and Mineral 

 Localities of Shropshire. The occurrences of thirty-two species, 

 excluding rock-forming minerals, were described. Calcite was 

 obtained at Snailbeach Mine, Minsterley, in splendid crystals of varied 

 habit, among others being large, pale mauve, rhombohedra twinned on 

 c (111), and opaque, white, prismatic crystals twinned on r (100). 

 Very large crystals of barytes and fine crystals of calcite came from 

 Wotherton Mine, Chirbury. The occurrence of pyromorphite and 

 witherite at several localities was noted. — Dr. Emil Hatschek 

 exhibited a series of specimens and lantern slides illustrative of some 

 reactions in gels. An inorganic gel (silicic acid) was used, and the 

 compounds resulting from the diffusion in it of several solutions were 

 shown ; there is a tendency to banding in the upper part of the 

 precipitate, while spherulitic growths were obtained in nearly every 

 case. Mr. W. Campbell Smith exhibited a spherulitic dolerite from 

 Vryheid, Natal ; the rock was interesting on account of the size and 

 beauty of the spherulites, which were I'evealed on weathered surfaces, 



III. — Zoological Society of London. 



March 19, 1912.— S. F. Harmer, Esq., M.A., Sc.D., F.R.S., 



Yice-President, in the Chair. 



Mr. T. H. Withers, F.G.S., read a paper, communicated by 

 Dr. W. T. Caiman, F.Z.S., on " Some early Fossil Cirripedes of the 

 genus Scalpellum^'. 



Attention was drawn to the form of the carina of the geologically 

 older species of Scalpelhim, and it was shown that the earliest forms 

 known resembled more closely the carina of Pollicipes, from which 

 Scalpellum is considered to be derived. An almost complete 

 capitulum of the Albian Scalpellum arciiatum was described, together 

 with some scales of tlie peduncle, and a restoration was given. This 

 specimen was important because, with the exception of a few detached 

 valves found in the Aptian (Lower Greensand), it was the oldest 

 known fossil Cirripede that could with certainty be referred to the 

 genus Scalpellum, sensu lato. S. arcuatum was considered to be an 

 ancestral form of the group of almost exclusively deep-sea species, 

 which Dr. P. P. C. Hoek had separated as a sub-genus under the name 

 Arcoscalpellum, and its relationship to other species was discussed. 

 S. trtlineatum was also redescribed. 



C O I?,K.E! SI= O nsrXD E 3Sr OE3 . 



A HUMAN SKELETON IN GLACIAL DEPOSITS NEAE IPSWICH. 



Sir, — My attention has been drawn to two communications^ in the 

 April jSTumber of your Magazine dealing with the human skeleton 

 I discovered here in October of last year. 



1 See Geol. Mag., April, 1912, pp. 164 and 187. 



