SERTULARELLA. CONICA. 7AM 
at nearly a right angle to the adnate part. Margin circular, even, frequently 
surrounded by annular striz. 
Gonosome not known. 
Dredged from a depth of 152 fathoms off the Florida Reef. 
This is a much smaller and more delicate form than any of the other 
species of Cryptolaria in the collection, its hydrothecxe having only about 
half the diameter of those of @. abies, the species which in this respect 
approaches it most nearly. The fasciculation is not carried to the same 
extent as in the other species, for it usually disappears from the pinne at 
a short distance from their origin, and those pinne which are given off 
near the summit of the stem are generally quite monosiphonic. 
In the monosiphonic portions the hydrothecz are seen to arise from the 
sides of a common tube to which they are generally adnate for more than 
half their height; they are here provided with a distinct floor, and are 
entirely differentiated from the supporting tube. In the fascicled portion 
they are, as in all the other species, deeply immersed and in great part 
concealed. 
The pinne are so disposed that those of one side do not arise from the 
middle point of the space opposite to the interval between two pinne of 
the opposite side, but from a point quite near to one end of this space. 
Famity SERTULARIDA. 
Genus SERTULARELLA Gray. 
Sertularella conica. 
Py XVe igs. 6; 7: 
Trophosome. — Hydrocaulus attaining a height of about an inch and a 
half, simple or with an occasional short branch, not fascicled. Hydrothece 
distant, each springing from a point close to the distal end of an internode, 
tumid towards the base, much narrowed towards the orifice, slightly marked 
with transverse corrugations on its upper side. 
Gonosome not known. 
Dredged southwest of Tortugas from a depth of 60 fathoms. 
Sertulareila conica is a rather rigid species. It is distinguished from S. 
polyzonias by its nearly simple habit, by the greater distance of the hydro- 
thee from one another, and by their more conical form, resulting from 
their rapid narrowing towards the orifice. 
