78 Meetings of the Scientific Association of Great Britain. 
dred specimens. The ovarium consists of botrioydal clusters, and is 
borne on the head whence an ovum falls, and is developed below, 
shooting out tentacula, which serve first as feet, by the aid of which 
the animal enjoys a degree of locomotion, and is thus enabled to 
choose his points of future fixture, but the tentacula are finally re- 
versed, and a stalk, growing from under the head, attaches the zoo- 
phyte to a rock. 
4. Sertularie are generally shrub-like, with thousands of cells, 
containing their appropriate polypi; the Sertularia Uber is three 
feet high from the root. The animal crawls, actively at first, but 
dies, and another springs from its ruins. Plantations of hundreds 
of Sertulariz may be easily obtained. 
5. The Flustra Carbasca resembles a leaf, studded with ses all 
of which, are inhabited by vivacious polypi. 
All the preceding are marine, and propagate, although solitary. 
6. The Cristatella mirabilis inhabits the fresh waters of Scotland, 
and is the most remarkable of polypiferous products. From one 
hundred to three hundred polypiare grouped in an ellipsoidal figure ; 
each polypus, although an integral portion of the common mass, is 
a distinct animal, with individual sensation and action. It consists of 
a fleshy stem, with a horse head, and having about one hundred ten- 
tacula. ‘The entire mass can move slowly, bearing along, it may be, 
three hundred animals. A single polypus of this kind can produce 
one thousand animals. | 
The stalk of the Sertularia polygonias has the power of reprodu- 
cing its heads, which are deciduous after recovery from the sea, and 
a redundance of heads may be produced by artificial sections. ‘Thus 
twenty two heads were produced in five hundred and fifty days from 
three sections of a single stem. 
The reproductive powers of some animals are very great. The 
amphitrite ventilabrum, and others of that genus have, from frag- 
ments of the largest specimens that could be obtained from the lower 
extremity, regenerated the complex and beautiful plume. All the 
preceding results, with others, equally singular, were illustrated by 
drawings by skilful arrists. 
Sept. 12.—Singular variety of the Human Race.—Mr. Pent! 
land offered reasons for believing, that there existed, at a compara- 
tively recent period, between 14° and 19° S. lat., a race of men, 
in whose crania two thirds of the cerebral mass, was placed behind 
the occipital foramen, and in which the bones of the face are very 
