Miscellaneous. 177 
3. “ Cystechinus crassus, a new Species from the Radiolarian 
Marls of Barbadoes ; and the evidence it affords as to the Age and 
Origin of those Deposits.” By J. W. Gregory, Esq., F.G.S. 
In this paper the discovery of a species of Cystechinus from the 
Radiolarian earth of Barbadoes was recorded. The specimen is now 
preserved in the National Collection, South Kensington. The form 
was described and distinguished from the three modern species 
which were found during the ‘ Challenger’ Expedition. The latter 
have shown that the bathymetrical range of the genus is from 1050 
to 2225 fathoms. 
The Author gave proofs that the specimen really came from the 
Radiolarian marl, and not from the overlying Coralline limestone, 
and after discussing the age of the marl, as inferred by Prof. E. 
Forbes from an examination of the Mollusca, and by Prof. Haeckel 
after studying the Radiolaria, gave his reasons for supposing that it 
is in reality more modern than these authors supposed, and may be 
referred to the Pliocene or Pleistocene. 
Though Cystechinus crassus possessed plates of greater thickness 
than those of the previously described species, the ambulacra were 
apetaloid, and the Author concluded that though an inhabitant of 
seas of less depth than those in which the modern forms occur, it 
may be fairly considered to have been a dweller in deep seas, and 
to indicate that the Radiolarian deposit is a true deep-sea ooze. 
MISCELLANEOUS. 
A new Marine Larva and its Affinities. 
By J. Watrer Fewxes *. 
[Plate VII. fig. 4.] 
THERE are in the waters of the Atlantic, near the coast of the 
United States, a large number of marine larve, very different from 
characteristic larvee of the European seas, of the adult state of which 
the naturalist isin profound ignorance tf. The adults of these larve 
may have been described and figured, and may be well known, but 
from the fact that many young marine animals are so different from 
the adults their relationship is unsuspected, although both mature 
and immature stages are known. It is certainly a desirable thing to 
trace these larve to their parents as a part of the great study of the 
metamorphosis of marine animals. This special line of zoological 
work has many attractions to an earnest band of working naturalists, 
* From ‘The Microscope’ for June 1888. 
+ Conversely also we are ignorant of the young of a much larger 
number of adult animals of our seas and bays. 
Ann. & Mag. N. Hist. Ser. 6. Vol. iv. 12 
