THE ANNALS 
AND és 
MAGAZINE OF NATURAL HISTORY. 
[SIXTH SERIES.] 
No. 23. NOVEMBER 1889. 
XLITL—On two new British Species of Sponges, with short 
notices of an Ovigerous Specimen of Hymeniacidon Dujar- 
dinii, Bowk., and of a Fossil Toxite. By Rosert Hore. 
[Plate XVI.] 
OF the two sponges which are treated of in the following 
pages one is believed to be new to science, the other, a species 
of Microciona, has been already shortly described by Mr. H. J. 
Carter, F.R.S. (Ann. & Mag. Nat. Hist. (4) xiv. pp. 456 and 
457), as a form of Microciona ar mata, Bowk.*; but, as Mr. 
Carter did not specifically distinguish it, and only ficured the 
toxite in embryo, it seems desirable now to redescribe it some- 
what more fully, with illustrations of the spiculation, from a 
fresh specimen which I have been so fortunate as to obtain. 
The specimen referred to was taken about the middle of 
March of the present year (1889) from a heap of scallops 
fresh landed on the beach at Hastings. They were said by a 
fisherman to have been dredged in about 25 fathoms off 
Beachy Head; however that may be, it is certain that they 
came from the English Channel at no very great distance 
from Hastings. 
This sponge has the spiculation and skeletal arrangement 
* Cf. Mr. Carter’s note, Ann. & Mag. Nat. Hist. (6) iv. pp. 249 and 
250 
Ann. & Mag. N. Hist. Ser. 6. Vol. iv. 24 
