"^'iSi!^,i:t" ^MMm in the Uni.

SPONGIIDA. 505
tinuous with the primary meshes of which an abundant network of coalescing
simple sexradiate stellate spicula occurs; among the spicules of the sarcode
are remarkable long attenuate forms, others free sexradiate, and others spinulo-quadrifurcate-sexradiate-stellate.
A. woodwardi, coast of Portugal;
A. feeundum (0. Schmidt).
FieUingia, g. n., Kent (Ann. N. H. (4) vi. p. 219). Sponge adherent,
consisting of a cortex of irregular reticulated spicula (of a hexradiate type),
having on its interior surface numerous reticulated laminas of extremely delicate
consistence ; common cavity of the sponge containing numerous spherical
aggregations of spicular reticulations, invested and brought into relation with
the cortex by loose reticulated fibres of coarser structure. F. lagettoides, off
Cezimbra, Portugal.
Euplectella aspergillum described by Van der Burg (Tijd. Nederl. Ind. 1870).
Veluspa polymorpha, gen. et sp. nov., Miklucho-Maclay (Mem. Petersb.
1870, p. 4), North Pacific. No generic diagnosis given. The following
varieties show such great degrees of difference that, like the author's
Guancha blancha, they might correspond to several genera, even orders, of
the present system. V. polymorpha, varieties: 1. gracilis, 2. digitata, 3.
arctica, 4. repens, 5. gyriformis, 6. cribrosa, 7. fiabelliformis, 8. infundibuliformis,
9. foliacea, 10. baicalensis (= Spongia baikalensis, Gmelin, Georgi,
Pallas, &c).
Spuma borealis, sp. nov., M.-Maclay (ib. p. 13), North Pacific and Polar
Seas. Varieties : 1. papillosa, 2. convoluta, 3. tuberosa, 4. velamentosa.
Euspongia brandti, sp. nov., M.-Maclay (op. cit. Mem. Petersb. 1870, p. 15,
Sea of Ochotsk.
Lvffaria pyriformis, sp, nov., Duchass. I. c. p. 45, Bahamas.
Professor E. P. WRIGHT gives some observations on the structure of
Dehitella atrorubens, Gray (Q. J. Micr. Sc. 1870, pp. 90, 91).
Raphidotheca, gen. nov., Kent (Ann. N. H. (4) vi. p. 218). Sponge incrusting,
cavernous interiorly; entire external surface of cortex bristling
with spinulate spicula, having their attenuate apices directed inwards, and
mingling freely with the fascicles of simple acerate spicula which form
upright supporting pillars to the roof; fascicles of smaller acerate spicula
abundant in the sarcode of the cortex, and also distributed less frequently in
the basal layer of sarcode, and in that investing the shafts or pillars; in
the latter also minute spicula of the " palmato-inequianchorate " type (Bbk).
Oscula absent or indefinite. R. marshall-halli, sp. nov., Kent, off Cezimbra,
Portugal.
PolyureUa, gen. nov., Gray (I. c. p. 312). P. schmidti, Gray, = Tetilla
polyura, O. Sdt.
Wyvillethomscmia, gen. nov., Perceval Wright (loc. cit. p. 7). Spongebody
subspherical, attached by a stem, opposite to which at the summit is
one large osculum, fringed by long delicate biacerate spicules. Interior of
sponge-body consisting of several cavities, opening into the osculum. Stem
prolonged through the body as an axis, and consisting of numerous biacerate
spicules, mixed with which are a number of anchoring spicules (fusiformirecurvo-ternate
of Bowerbank), the recurved ends of which are always
directed to the point of attachment. Spicules of the body furcated attenuatopatento-ternate
(Bbk.), the radii of the ternate spicules meeting each other
to form a remarkable loose network-like pattern on the surface of the sponge,
1870. [VOL. VII.J 2 L