164 DR. J. E. GRAY ON MYRIOSTEON HIGGINSII. (Apr. 12, 
I therefoie propose to give it a name, in hopes that it may lead to 
a more perfect knowledge of the animal, and to characterize it thus:— 
MyRIosTEON, gen. nov. 
Body, entire form unknown. The part alone known (fig. 1) is 
elongate, tapering, straight, rather compressed, rounded above, and 
flattened beneath; the sides and upper surface formed of convex 
tetragonal ossicles, united by short radiating branches; with four 
or five round pores round each ossicle; ossicles of nearly equal size 
in all parts of the surface. 
The lower surface flat (figs. 2, 3, & 5), formed of smooth flat-topped 
tesseree, which are very close together, forming a nearly continuous 
surface, with circles of six triangular radiating pores near the margin 
of each ossicle—the ossicles near the thickest part of the body being 
the largest, and very gradually diminishing in size towards the top. 
The ossicles are all placed on a rather solid, thick, hard internal 
layer, which is formed of closely intertwined short longitudinal fibres, 
or opaque bone-like spicula, which seem to give considerable rigidity 
to the body. 
The convex upper edge has two longitudinal series of oblong 
pores, rather unequal in size, and sometimes placed so close together 
as to run nearly into one another, and at others separated from each 
other by a considerable interval. The larger pores are surrounded 
by a slightly raised edge, showing that some tentacle or other body 
is emitted through them. There are also a few smaller circular 
pores scattered on the sides of the tube. 
Fig. 1. The entire specimen, greatly reduced. 
2. Cross section of the specimen, natural size. 
3. Side view, showing the flat under surface. 
4, Figure of the surface, natural size. 
MYRIOSTEON HIGGINSII, sp. nov. (Figs. 1-5.) 
Hab. 2 
The fragment of this animal, which alone is known, is 264 inches 
long and 3 inches in circumference at the base, tapering to a rather 
blunt end, which is pervious; but it is evidently imperfect, and may 
be closed in the perfect state. The flattened part of the base is rather 
more than half an inch wide at its widest part. 
I have named the specimen after the Rev. H. H. Higgins, one of 
