86 
Kirtley F, Mather 
Bellerophon Keymanus deKon. 
Bellerophon Urei Flemm. 
cf. 
Bellerophon crassus var. 
Bellerophon costatus Sowerby 
Bellerophon decussatus Flemm. 
Pleurotomaria granulosa deKon.? 
cf. 
wewokanus 
Euconospira arkansana 
Pleurotomaria Ivanii (Leveille) ? 
Murchisonia angulata (Phill.) 
cf. 
Worthenia tabulata 
Euomphalus pentangulatus Sowerby 
cf. 
Straparollus cf. spergen- 
Euomphalus tabulatus (Phill.) 
cf. 
ensis 
Euomphalus catilloides 
Capulus pumilis Traut. 
cf. 
Strophostylus subovatus 
Capulus mitraeformis Traut. 
cf. 
Platyceras parvum 
Capulus parasiticus Traut. 
Macrochilus ampullaceus Fisch, 
Chemnitzia longispira Traut. 
cf. 
Aclisina? sp. 
Nerita ampliata (Phill.) 
Natica Omaliana deKon. 
cf. 
Sphaerodoma sp. 
Orthoceras ovale Phill. 
Orthoceras Polyphemus Fisch. 
cf. 
Orthoceras sp. 
Nautilus clitellarius Sowerby 
cf. 
Gastrioceras 3 sp. 
Nautilus subsulcatus Phill. 
Nautilus excentricus Eichw. 
Nautilus oxystomus Phill. 
Phillipsia pustulata Schloth. 
cf. 
Griffithides 2 sp. 
Phillipsia Grunewaldti Moller 
In addition to the points of similarity and difference suggested 
above, the absence from the Mjatschkowa fauna of Zaphren- 
tidae, Favositidae, Pentremites, and Archimedes is noteworthy. 
Archimedes, however, is known to occur in the overlying Schwa- 
gerina limestone. The association in the Russian fauna of forms 
closely akin to representatives of both the residual Mississippian 
and proemial Pennsylvanian elements in the Morrow is readily 
apparent from the above lists. The presence of Enteletes, 
Squamularia, and Meekella is especially significant as indicative 
of Pottsville rather than Chester age. Although the parallelism 
between the two faunas is sufficiently close to suggest their con- 
temporaneity the differences are sufficiently noteworthy to indi- 
cate that their development occurred in somewhat isolated prov- 
inces. 
On the Brogger Peninsula in Spitzbergen, latitude 79° N, longi- 
tude 12° E, occurs a series of limestones with a fossiliferous 
horizon near its base, from which was obtained a fauna described 
