674 
ZOOLOGICAL LITERATURE. 
Genera ; — Alcyoncellunif Blainville : A. gelatinosum, Blainy*, Gray, 1. o. 
p, 667. DunBterviUiaj Bowerbank : D, tessellatUf Bk,, Gray, 1. c. p. 667. 
Family 21. APHBOCEBASiDAa. Sponge tubular, branched, formed of two 
coats ; outer coat of simple fusiform spicula, placed side by side in the 
longitudinal axis of the stem and branches. Inner coat and netwoi'k 
of interlaced fibres, placed in all directions. Branches simple, attenu- 
ated, and open at the tip. 
Genus ; — Aphroceras, Gray ; A, alcicorniSf Gray, I, c. p. 668, 
New genera and species : — 
PlacospongiUf gen. nov,. Gray, I, c. p. 128, Sponge hard, angular, stony, 
angularly branched. The axis solid, formed of closely packed siliceous 
globules, with an areolated tubercular surface, and covered with variously 
shaped hard plates of similar tubercular siliceous globules, having an areo- 
lated appearance under the microscope. The outer plates differ greatly in 
size and form j but they meet at the edges, and rarely one edge slightly 
overlaps the other, giving the sponge an angular appearance. The axis is 
separated from the superficial plates by a continous layer of sarcode, furnished 
with bundles of nearly pai'allel pin-shaped spicules, which form columns 
diverging at right angles from the outer surface of the axis to the inner 
surface of the outer plates. P. meldbesioides, sp, n,. Gray, I, o, p, 128. figs. 1-4, 
Borneo. 
Lacinia, gen. nov., Selenka, /. c. p. 668. The parenchyma of this sponge 
produces bodies which contain carbonate of lime. — L. steUiJlca, sp. n., Selenka, 
I, c, p. 668, Taf. 36. figs, 8-10, from Bass’s Strait. 
Spongelia horrens, sp. n., Selenka, 1. c. p. 566, Taf. 36. figs. 1-4, Bass’s 
Strait. — S. cactosy sp. n., Selenka, 1. c. p. 966, Taf. 35, fig. 5, Bass’s Strait, 
Pitelia repens, sp. n., Selenka, 1. c. p. 567, Taf. 35, fig. 6, Melbourne. 
Cacospongia pocuJum, sp. n., Selenka, 1. c. p. 667, Taf. 35. fig. 7, Melbourne. 
The author remarks that this species is very like that figured by Foubressin 
and Michelotti (work on the Sponges of the Caribbean Seas) as Spongia 
haagensenii, from St. Thomas, and adds, Die kurze dort gegebene 
Diagnose ist unbrauchbar.” But might not the same be said of the diagnoses 
of all the species in this prettily illustrated work ? 
Stelletta nuXy sp. n., Selenka, /. c. p. 569, Taf. 35. figs. 11-13, Samoa Islands. 
— S. hacca, sp. n., Selenka, 1. c. p. 669, Taf. 35. figs. 14, 16, Samoa Islands. 
Is this a Stelletta? the author remarks on its affinity to Tethya cranium, 
Bowerb. 
Suberites panis, sp. n., Selenka, 1. c. p. 570, Taf. 35. fig. 16, Melbourne. 
Hancock (/. c.) describes the following: — CUona vermifera, p. 230, pi. 8. 
fig. 2, in a species of Chama\ C. mazatlanensis, p. 240, pi. 8. fig. 1, on a 
Purpura from Mazatlan ; C. glohulifera, p. 240, pi. 8. fig. 3, in Spondylus 
gcederopus, from the Mediten-anean \ C. carpenteri, p. 241, pi. 8. fig. 4, in a 
Serpula adhering to a Chama, from Mazatlan. 
CUona. Emended descriptions of the following British species of this 
genus are given by Hancock (/. c.) : — C. celata, p. 237, pi. 7. fig. 7; C. gorge- 
nioides, p. 237, probably a mere variety of C. celata j C. northumbrica, p. 237, 
pi. 7. fig. 1 ; C. vastijica, p. 237, pi. 7. fig. 2 ; C. corallmoides, p. 238, pi. 7. 
fig. 3 5 C. gracilis, p. 238, pi. 7. fig. 4 j C. hoivsei, p. 238, pi. 7. fig. 6 j C. alder i, 
p. 239 j 0, lobata, p. 239, pi, 7, fig. 6. 
