494 | Scientific Intelligence. 
The sinaagie of pits on the surface of sponge-spicules was noticed 
by Kolliker as a peculiar degeneration of the structure. Dr. 
Carter déactibe =) and figured pits in the outer part of a spicule, 
and distinctly referred them to the action of a vegetable 209) . 
the Ann. & Mag. Nat. Hist. ser. 4, vol. xii, p. 457, pl. xvi, figs 
None of the pits seen by my friend reaches the axial canal : aa 
some of them terminate in globular excavations 
It is evident that the assimilation of the organic s acura in 
. the sponge-spicule by the vegetable organism pro the d 
struction of the siliceous structure; and probably the colloid sien 
unites with _ rib dead of the destr oyer and forms an organ 
amount of erosion does not appear to be in relation with the size 
of the primary Leite kha 
mis not an Achlya,; and all that can be said is 
that it consists of pelidses rations without ver y definite cell-walls, 
- sales tly et th a very Lageeih 4 limiting texture surrounding 
nular greenish plasma, and that there is much free and non- 
cellular gaa with bodies like small nuclei, the whole having a 
is probably a plant) Sperone Carteri.—Ann. & 
at. Hist., Aug., 188 
14. Bulletin of the Mitsaes io Go omparative Zoology at Har- 
vard College. Vol. VI, Part ii, No. 12. E. L. Marx on the 
Maturation, Feeundation and Seqmentation of Limax campestris 
in —625, 8vo, with 5 double plates. —A_ pro- 
sear microscopic rese arch throwing new light on the metamor- 
uc 
Ssiekclopoent. reviewing at length, with criticisms, previous 
researches on the subject, and giving an extended leg 
15. The Paleocri noidea.—Part If of Wacusmurn and SpRINe- 
uR’s revision of the Palwocrinoidea is contained in che Piscosdicigs 
of the Academy of Natural Sciences of plat ee for 1881, 
commencing with page 177. It is devoted to the Family Sphe 
roidocrinide, under which are isebaded the Sub-families Flatyeri- 
nid, Rhodocrinidee and Actinocrinide. It is a long and very 
vinshia paper 
mos les Mondes: Revue hebdomadaire des Sciences et de 
bé F. XY 
Co 
l Indust fondée et dirigée pars M. ’Ab . Moigno, Paris. 
—The valuable weekly review, Les Mondes, commenced b 
VPAbbé Moigno in 1852, appears now in new form, enlarged in 
size and improved in appearance. The Abbé still retains the 
direction of the review, but he has the assistance of a group of 
collaborators, under whose combined efforts by <Lagawacis to have 
an increased sphere of usefulness in the futur 
