30 ROYAL SOCIETY OF CANADA 
1. Gastral quadriradiates—With slender facial rays and a very 
long apical ray projecting into the gastral cavity; facial rays straight 
or slightly curved, sharply pointed, bent a little toward the gastral 
cavity, ‘170 mm. long and ‘0049 mm. thick at midlength; apical ray 
reaching a length of ‘753 mm. with a thickness of ‘006 mm. 
2. (rastral triradiates—Strongly sagittal; the three rays of the 
same thickness, sharply pointed and lying in the same plane; the basal 
ray in its greatest development twice as long as the lateral rays, straight, 
reaching a length of ‘353 mm. with a thickness at midlength of ‘006 
mm.: lateral rays, including an angle of 120°, curved slightly toward 
the basal ray, about ‘176 mm. long. In several layers parallel to the 
gastral surface. 
3. T'ubar triradiates.—Sagittal, with little variation in size; of very 
much the same shape as the gastral triradiates but smaller; basal ray 
averaging ‘196 mm. long, lateral rays about ‘117 mm. long and ‘006 
mm. in diameter with an included angle of 123°, 
4. Large oxea—Occurring in the outer ends of the radial tubes 
beyond which they project at right angles to the general surface; gen- 
erally slightly curved, reaching a length of ‘849 mm. and a thickness 
of ‘013 mm. , 
5. Linear spicules.—Very slender, few in number, up to a length 
of ‘196 mm. and ‘0016 mm. thick; in direction parallel to the large 
oxea among which they are scattered. 
Locality Davis Strait, Eglinton Harbour, 15 fathoms, mud bot- 
tom, A. M. Rodger, 17th of September, 1892, one specimen. 
GRANTIA PHILLIPSII. (Sp. nov.) 
(Plate IV, figs. 9, 9a-1.) 
Sponge solitary, stipitate, consisting of a well-developed peduncle 
supporting an elongated, spindle-shaped head, that terminates above in 
a single naked osculum. In the specimen representing this species in 
the collection, the lower end of the stem is wanting. Height of speci- 
men 9 mm., length of head 3-3 mm., greatest breadth of head at its mid- 
length 1 mm., thickness of stem ‘3 mm. with an increase in diameter 
toward the head, width of osculum about ‘5 mm. Wall -2 mm. thick. 
surrounding a comparatively wide gastral cavity that extends downward 
to the junction of the head with the stem. 
Skeleton.—The skeleton consists of gastral quadriradiate, tubar tri- 
radiate and dermal triradiate spicules and very small, slender oxea echin- 

