Miscellaneous. 
817 
2. “ Note on a Femur and a Humerus of a small Mammal from 
the Stonesfield Slate.” By H. G. Seeley, Esq., F.L.S., F.G.S., Pro¬ 
fessor of Geography in King’s College, London. 
The author described a small femur and humerus pi’eserved in 
slabs of Stonesfield Slate in the collection of the British Museum, 
to which they were presented many years ago by Mr. Pease Pratt. 
The bones nearly correspond in size ; and, in the absence of evidenco 
to the contrary, the author preferred to regard them as possibly 
belonging to the same animal. From their characters the author 
was inclined to associate them with the jaw known as Pliascolo- 
therium, and to believe that they represented a special, probably in¬ 
sectivorous, monotreme type, with indications of marsupial tenden¬ 
cies, such as, on the hypothesis of evolution, might well be expected 
to occur early in the development of the Mammalia. 
3. “ A Review of the British Carboniferous Fenestellidae.” By 
G. W. Shrubsole, Esq., F.G.S. 
In this paper the author gave the results of his investigation of 
the Fenestellidae from the upper beds of the Carboniferous Lime¬ 
stone on Halkin Mountain, in Flintshire. He stated that the de¬ 
scribed Carboniferous species of Fenestella now number 24, of which 
he has been able to examine 19, and finds that they have been 
needlessly multiplied, owing especially to the neglect on the part of 
describers to allow for difference in the structure at various stages 
of growth and in different parts of the polyzoarium. His investiga¬ 
tions led him to refer the forms known to him to only 5 species, 
namely, Fenestella plebeia, M‘Coy, F. crassa, M‘Coy, F. polyporata , 
Phill., F. noclulosa , Phill., and F. membranacea, Phill. 
MISCELLANEOUS. 
New Observations on the Development and Metamorphoses of 
the Tapeworms. By M. P. Megnin. 
The author refers to the well-known investigations of Van Bene- 
den, Yon Siebold, Leuckart, Kuchenmeister, and others, from which 
it was concluded that the vesicular worms must be swallowed by a 
carnivorous animal in order to attain their perfect, reproductive, 
ribbon-like form—and remarks that, while this hypothesis accounted 
well for the production of the hooked Tcenice of the Carnivores and 
Omnivores, it did not explain the origin of the unarmed Tcenice of 
Herbivores, such as the horse, ox, sheep, rabbit, &c., which do not 
devour any animal capable of harbouring the scoleces of their tape¬ 
worms. He finds in horses and rabbits that the vesicular worms 
(an Echinococcus in the case of the horse, Cysticercus pisiformis in 
the rabbit), when they are developed in adventitious cavities in 
direct communication with the interior of the intestine, resulting 
from the enlargement of follicles or glands into which the six- 
Ann. & Mag. N, Hist. Ser„ a. To/, iii. 22 
