A. EF. Verrill— The Bermudu Islands; Coral Reefs. 337 
slender, acute, oxeote spicules, mostly entirely enclosed in the red- 
dish spongin, but many are partly free in the meshes. 
The spicules are mostly about .22-.26"™ long. Very common. 
Color red in life; reddish brown when dry. 
Pachychalina micropora, sp. nov. Fig. 178. Plate xxxvc, fig. 7, spicules. 
A delicate sponge, friable when dry, encrusting, or forming small 
convex or lobate masses. Surface smooth ; dermal layer thin, dis- 
tinct, very finely reticulated, the pores microscopic, oscules few, 
4—5™™ in diameter, mostly on summits of low conules. Subdermal 
areole small, about .5-1™™" in diameter, with rounded angles, and 
separated by walls often 2-3™™ thick and finely reticulated. Fibers 
slender, multispiculose, with small amount of spongin. Spicules very 
small and mostly decidedly short, mostly bent oxeotes (see figures) 
about .01—.015™™ in length, by .00066 to .00094™™ in diameter. 
A few long slender oxeotes, about .45™™ long (fig. 7, 6 of plate), 
were also observed; they may be of extraneous origin. 
Color yellowish white when dry. 
Figure 178.—Pachychalina micropora ; one of the conules, with oscule, x 2; 
asyaqpAtes dls) SV 
Cribrochalina Bartholmei (D. & M.). 
Spongia Bartholmei Duch. and Mich., op. cit., p. 42, pl. vi, figs. 5, 4, 1864. 
When well grown this has the form of a large regular funnel, or 
of a broad cnp, with a short narrow stem. It may become 10 inches 
high and 6 to 8 broad. The sides are 8 to 12™" or more thick, not 
thinning much at the edges, which are rounded. The surface of 
both sides is smooth and very finely reticulated, the meshes .1 to 
.2™™ in diameter. 
The oscules are mostly on the inside of the cup, numerous but 
inconspicuous and very small, mostly .2 to .38™™ in diameter. 
In one large specimen from Bermuda there were two stout fistular 
side-lobes at the base, with a terminal oscule about 6—8™™ wide. 
The skeletal fibers are densely spiculose, stout, and reticulated, 
much as in Pachychalina, the radial ones plumose, but the sponge is 
harder and firmer when dry, though soft when wet. 
