250 Mr. W. S. Kent on the Affinities of the Sponges. 
nata. Lamina proligera tenuis, ceraceo-gelatinosa, e strato 
gonimico enata, excipulo proprio destituta. Sporidia exi- 
gua, simplicia, hyalina, in ascis elongatis polysporis. Thal- 
lus cartilagineo-coriaceus, umbilicatus, monophyllus. 
Guepinella myriocarpa, Bagl. 
Thallus cartilagineo-coriaceus, umbilicatus, subrotundatus, ut 
plurimum undulato-lobulatus, supra viridi-olivaceus, mar- 
ginibus tumidulis, reflexis, albido-griseis, subtus nudus et 
carneo-fulvus. Apothecia discreta, quandoque contigua, 
primum punctiformi-verrucarioidea, matura discoidea ; 
nudo, nye ay humecto sanguineo, lamina proligera 
basi subpedicella assa sporigera apice mucronis ad 
instar eae membrana asco ropria conspicue bre- 
viore.  Paraphyses gee reme apice de 
aura 
simplicia, hyalina. 
yn. :—Zndocarpon ae ay Delis. in Duby et DC. Bot. 
Gall. 594; Fr. L. Europ. 410; Mont. in Arch. Bot. vol. ii. 
XXIV.—Professor esi and Mr. E. Ray Lankester on the 
eu of the Spon. By W. SaviLLE Kent, F.Z. 
F.R.M.S., of the. Se Department of the British 
Museum 
FRESH from the learned Professor’s lecture-room, a more 
ete epin of Hückel's doctrines than mys frs Mr. E. 
Ra could scarcely have been lit u and the 
om matter of surprise to myself has been that dio champion 
so long delayed his advent. 
The whole force of Mr. Lankester's argument turns upon a 
MT eese of my views, which Í must immediately 
rectify; beyond this he has not a single fact to oppose in 
refutation of the views he combats ; and his statement regard- 
