No, 1614. NHW AND OLD CARBONIFEROUS FOSSLLS—GIRTY. 237 
Steinmannia benjamini is clearly more closely related to S. salinaria 
of the two Indian species. It is distinguished by the less extensive 
development of internal vesicles, the presence apparently of pores of 
but one size, and the fact, so far.as I can determine from the figures, 
that they are larger than those of the Indian species. The American 
form is also as a whole smaller. | 
It gives me great pleasure to name this species in honor of Dr. 
Marcus Benjamin, editor of the U. S. National Museum. 
Locality and horizon.—Allen limestone; cut on the Santa Fe Rail- 
road, 6 miles southwest of Chanute, Kansas. 
Type-S pecimen.—Cat. No. 538467, U.S.N.M. 
CCG2LOCLADIA, new genus. 
Of this genus only a single species is known, and consequently only 
a partial generic description can be drawn up embodying those 
features which are shown by the form in question and which would 
presumably be possessed by congeneric species. 
The growth is more or less arborescent, the branches cylindrical, 
with a large, uninterrupted cloaca. The walls are more or less thick, 
composed of consolidated spicules, probably tetracts, and pierced by 
numerous ostia, which sometimes ramify toward the outer surface. 
In the typical species the ostia are extended outward as spiniform 
processes. An epidermal layer of some sort was probably present. 
The specimens representing this genus are preserved in such a 
different manner from those of the associated /Teterocelia, which 
probably represents the Sycones of the Calcispongie, that they may 
justly be inferred to belong to the Pharetrones, or else, though at 
present calcareous in chemical composition, to the Silicispongie. 
The Pharetrones seem largely restricted to the Mesozoic, and upon 
the whole it 1s rather more probable that the present type belongs to 
the Silicispongiz. The spicular structure and the general arrange- 
ment of the canal system seem to make it probable that it is related 
to the Lithistida, rather than to the Hexactinellida. Owing to the 
difficulty of determining the exact character of the spicular element 
it is impossible to reach a satisfactory conclusion in regard to the 
more intimate relationship of Ce@locladia among the Lithistida. It 
is, however, distinct. from a considerable number of genera with 
which comparisons have been made, chiefly in the cylindrical mode 
of growth. Doryderma is like it in this respect, but probably has a 
different spicular element and possesses a large number of axial canals 
instead of a large central cloaca. Cylindrophyma, of the upper 
Jurassic, is perhaps the most closely similar in every respect. Appar- 
ently the spicular unit and mode of consolidation are different in the 
present form. 
Type of genus.—Cewlocladia spinosa. 
