ae 
Mineralogy and Geology. ° 127 
— with color, and Sowerby has figured such markings in P. cari- 
nala and P. rotundata. In the excellent monograph of the carbonif- 
of pattern-coloring are faintly shown in the figures of Solarium pentan- 
gulatu amy and distinctly in those of Pleurotomaria carinata and Patella 
bits cabinets of the Geological Survey of Great Britain are some 
finely. -preserved fossils from the carboniferous limestone of Parkhill, 
near Longnor in Derbyshire. Among these are several that present 
unmistakable pattern-markings, evidently derived from the original 
coloring. They are— 
leurotomaria carinata and conica, beri wavy blotches, resem- 
bling the coloring of many recent Trochid 
An unde scribed Trochus, showing a spf band of color. 
Metoptoma pileus, and 
Patella? retrorsa, both with radiating stripes, such as are presented 
by numerous existing Patellide. 
Natica plicistria, with broad mottled bands. 
Aviculo-pecte en, a Rt unnamed species, a spotty markings on 
the ‘ale in the m of many existing Pectin 
ido spteien sa btobiives, pes ? Beautifully ae with radiating, 
well. Badined stripes, varying in each individual, and resembling the 
patterns presented by those ares Avicule that inhabit shallows and 
moderate 
viculo-pecten intercostatus and elongatus also exhibit markings. 
Spirifer decorus and Orthis resupinata, show fine radiating white lines. 
Terebratula hastata, with radiating stripes. 
The analogy of any existing forms that can be compared whl those 
enumerated, would lead to the conclusion that the markings in these 
than 50 fathoms. In the case of the Terebratula, which belongs to a 
genus the majority of whose living representatives inhabit deep water, 
it may be noticed that all the living species exhibiting striped shells are 
exceptions to the rule, and come from shallow w 
In the British Museum there is a seraritalle spotted adele of a 
ome _ Terebratula, Shctight by Sir John Richardson from Boreal 
pose ens of the Turbo rupestris, from the Lower Silurian Lime- 
Stone of the Chair of Kildare stat Dublin, exhibit appearances that 
Seem to indicate spiral bands of color. 
7. Arsenate of Lead and revetias of Lead.—Beautiful specimens 
of these two minerals have been detected by Dr. J. Lawrence Smith 
among the pein coming from the Wheatley Mine near Pheenix- 
ville, Penn. A ful | description of gl ae = given in his next pa- 
per on the reéxamination of American 
8. On: the Identity of Ripidolite of von ‘n Kobell with Clinochlore ; by 
N. von Koxscnarov.—M. N. von Kokscharov has sent us an elaborate 
Paper on the Clinochore of a ahoiansiwdh and its identity with Ripido- 
tle, which is crowded out of this number and will appear in our next. 
