| OCR Text |
Show 768 DR. J. S. BOWERBANK ON THE SPONGIAD.E. [Nov. 21, or less yellow in colour ; the arrangement of nervures much the palpi thicker, antennae much more slender. Type C. divisa. CELERENA VULGARIS, n. sp. Allied to C.perithea, of Cramer, from Amboina, but with the transverse golden-yellow band of primaries twice as wide, and the black-brown border of secondaries only half as wide: expanse of wings 2 inches 4 lines. This is evidently a very common species. The above-named genus will include the following species:-C. lerne, Boisd.; C. divisa, Walker; C. andamana, F'elder; C. commutata, Walker; C. mutata,Walker; C. perithea,Cramer; C. proxima, spreta, and connexa of Walker ; and C. eucnemis of Felder. 5. Contributions to a General History of the Spongiada. By J. S. B O W E R B A N K , LL.D., F.R.S., &c-Part VIII. [Received November 8, 1876.] (Plates LXXVIII-LXXXI.) The Sponges described in the present contribution to a general history of the Spongiadae are rare and very remarkable species. Three of them are, to the best of my knowledge, unique specimens ; and the fourth, Chalina verticillata, elucidates in a singularly striking manner the structure and history of a diluvial fossil sponge enveloped in flint, which has for a long period been a mystery to palaeontologists. DESMACIDON PLUMOSA, sp. nov. (Plate LXXVIII.) Sponge elongately fan-shaped, pedicellate ; pedicle long and stout, smooth, fan-shaped, expansion prominently hispid on both planes. Oscula simple, dispersed, minute, and numerous. Pores inconspicuous. Dermal membrane aspiculous. Skeleton reticulated, rete irregular ; primary fibres stout and solid, radiating irregularly from the discal end of the pedicle in the same plane; secondary fibres radiating from the primary ones at nearly right angles to the planes of the sponge, short, slender, and delicately plumous. Spicula sub-fusiform- acerate. Colour, in the dried state, fawn-yellow. Hab. Sharks' Bay, Western Australia. Examined in the dried state. I obtained this singular and interesting sponge among many others from a dealer in specimens of natural history, who stated that it was from Sharks' Bay, Western Australia. It is 15 inches in height, and about 5 inches broad at near the middle of the fan-shaped expansion. No portion of the basal attachment remains ; and the pedicle in its present state slightly exceeds 4 inches in length. It is slightly |
