538 Prof. T. G. Bonney—Serpentines from the Rhetian Alps. 
amongst the numerous representatives of Amberleya in the Lower 
Oolites. This is essentially a Corallian form occurring, according 
to Reemer, in the Upper Coral Rag of Hildesheim. Brauns (Obere 
Jura, p. 221) describes it as a “leit fossil,” of the middle beds of 
the Coralline Oolite in Hanover, etc. D’Orbigny had it from the 
East of France and from La Rochelle. 
In Yorkshire it is very rare, and has only been found in the 
Coral Rag of the Howardians. It occurs at Upware, but is unknown 
to me from any other part of England. 
EXPLANATION OF PLATE XVII. f 
Fic. 1. Nerinea pseudovisurgis, sp.n. Coralline Oolite of Pickermg. Leckenby 
Collection. : t 
»» 2a. N. Remeri, Philippi. Corallian of Yorkshire. Leckenby Collection. 
» 25. The same, whorl enlarged. 
» 3a. Nerinea, elongated species. Coral Rag of Langton Wold. My 
Collection. : 
The same, whorl enlarged. 
N. Goodhallii, Sow. Coral Rag of Yorkshire. York Museum. 
Nerinea, cast of part of interior. Coralline Oolite of Pickermg. My 
Collection. 
» 6a. Alaria bispinosa, Phillips. Possibly from the Zrigonia-beds of Picker- 
ing. Jermyn Street Museum. 
», 64. The same, portion enlarged. 
» 6c. Alaria bispinosa, another specimen. Lower Calcareous Grit of Cayton 
Bay. Leckenby Collection. 
a.&b. Littorina, cf. Meriani, Goldf. Lower Caleareous Grit, Scarborough. 
Leckenby Collection. 
» 8a. L. muricata, Sowerby, var. muricatula, Young and Bird. Coral Rag of 
Brompton. My Collection. 
», 8d. Another specimen enlarged. 
» 9a. Littorina, cf. pulcherrima, Dollfus, pars. Coral Rag of North Grimston. 
My Collection. 
», 94. Portion of a specimen from the Trigonia-beds at Weymouth, enlarged. 
» 10. Amberleya Stricklandi. Coral Rag of Brompton. Strickland Collec- 
tion. Front and back. 
» ll. Amberleya princeps, Roemer. Coral Rag of Hildenley. Strickland 
Collection, 
Or co 
Site aah oe 
(Zo be continued.) 
J].—On some SerPentInes From THE RumTran ALPs. 
By Prof. T. G. Bonney, M.A., F.R.S., F.G.S. 
re name serpentine has been applied by many authors with so 
much vagueness that it appears to me desirable to lose no op- 
portunity of examining any rock bearing this title, and to record 
briefly the result.'_ A considerable number of patches of serpentine, 
generally of limited extent, are laid down on Ritter von Hauer’s 
Map of the Eastern part of the Alps, some of which also appear on 
that of Professor Theobald (sheet xx. of the Federal Map of Switzer- 
land). Several of these I was able to examine, sufficiently for my 
purpose, during a visit to the district last summer. 
The first patch of serpentine which I was able to visit in situ is 
* In Prof. Theobald’s admirable monograph, Geol. Beschreib. von Graubiinden, we 
find (p. 40), after he has admitted that there is much to favour the view of serpentine 
being an eruptive rock, the following statement: ‘‘ Es mége der Serpentin eine letzte 
Stute yom Umwandlung anderer Gesteine, Gabbro, Hornblendefels, Diorit, und 
selbst Schiefergebirgs sein, wie schon Studer bemerkt.”? | 
