APPENDIX A. (LONSDALE ON CORALS.) 
615 
than in the English fossil, though in the latter, in areas of equally limited extent, the equivalent lamina* 
varied in character. 
It has been deemed correct to give this very defective notice, in the hope that it may call attention to 
what is considered an interesting additional connexion between the palaeozoic faunae of Eastern and 
Western Europe. It has been considered right not to suggest a specific name, as there were no means 
of determining how far the fragments examined may be referable to the Turbinolia arietina of M. Fischer 
(Oryctographie, pi. 30. fig. 4). 
Locality and Formation . — Ussa River, junction with the Volga near Samara. Upper Carbon, limestone. 
Cystiphyllum impunctum, sp. n. 
Stems cylindrical, grouped, traversed externally by longitudinal obsolete strict and transverse irregular lines 
of growth; beneath the outer wall, broad, shallow furrows, strongly punctured; vesicular lamince varia- 
ble in size ; no radiating lines or lamella:. 
Idiis coral differed materially from any described species known to the author, but it agreed in the 
punctured furrows and the absence of radiating lines with the characters of a very imperfect specimen of 
Cystiphyllum from the Devonian limestones of Newton Bushel (England). 
Two groups of Cyst, impunctum wore examined. The larger consisted of parts of six stems closely 
aggregated, but without the cylindrical contour being affected, and fractured portions exhibited no clear 
proofs of the adjacent sides having been united. The finest stem, imperfect at each extremity, was three 
inches and a half in height, and had throughout the greater portion of its range a uniform diameter of 
ten lines. The outer walls were imperfectly displayed, but they were apparently thin and nearly solid. 
The subjacent impunctured furrows, or casts of tuberculated, compressed ribs, were well- exhibited in 
some parts ; and they were equally strong at both extremities of the stems, ranging longitudinally ; they 
were also traversed by the edges of the vesicular laminse. The whole of the interior was occupied bv 
the bladder-like plates, which were very irregular in size, curvature and disposition. No signs of the 
mode of producing additional stems were observed. 
Locality and Formation. — Margin of the lake of Petropavlofsk, sixty versts north-west from the works 
of Bogoslofsk. Silurian. 
Caninia, Michelin. 
Corals be’onging to this genus have unfortunately been described under the double appellations of 
Caninia and Siphonophyllia. The former designation was proposed by M. Michelin at the Scientific 
Congress of Turin in 1840, and a description of the generic characters was published in 1841 in the 
Supplement to the Dictionnaire des Sciences Naturelles, tome i. 2i6me partie, p. 485. In one of the 
earlier numbers of the Iconographie Zoophytologique de France (1841 ?), M. Michelin also published a 
detailed explanation with illustrative figures of Can. giganten (p. 81. pi. 16. fig. 1). The first account of 
the Siphonophyllia of Dr. Scouler, laid before the public, is believed to be that given by Mr. M’Coy in 
p. 187 of the “ Synopsis of the Carboniferous Limestone Fossils of Ireland,” prepared under the directions of 
Mr. Griffith (1844). The generic name, Caninia, appearing therefore to have been first published with 
descriptive characters, the retaining it has been deemed correct. 
The notices, however, which have been thus communicated do not express fully the structures by 
which the corals described in them may be separated from previously established genera 1 ; and in conse- 
1 Dr. Scouler’s account of the genus (Siphonophyllia) not having been yet published, the above remark cannot 
apply to his views respecting its structure. 
4 k 2 
