IQI5.] N. ANNANDALE: Parasitic Sponges. 463 
The spicules are small, moderately slender and all of one kind. 
They are by no means numerous except in the papillae; in the gal- 
leries, except in the diaphragms, they lie parallel to the surface. 
They are somewhat variable in form, but are all tylostyles with 
well-developed heads. These are usually subglobular but may be 
trilobed or irregular; occasionally they contain a single relatively 
large dilatation of the axial canal There is occasionally a pro- 
jecting annulus a short distance below the head. The shaft is as 
a rule slightly curved; its curvature may be of a general nature or 
confined to the uppermost third. Immediately below the head 
the shaft is slightly constricted; lower down it swells slightly 
but never becomes quite as broad as the head; the broadest part 
is usually situated in the upper half and the lower half tapers 
very gradually to a fine point. 
Fic. 2.—Spicules of Cliona kempzi, sp. nov. 
Measurements of Spicules. 
Length of spicule... .. 0°I127—0'205 mm. 
Greatest breadth of shaft .. 0'004I—0'0082 ,, 
Diameter of head .. .. 0°'0082—0'0125 ,, 
Type.—No. 6956/7 ZEV, Ind. Mus. (on slide in Canada 
balsam). 
Locality.—Port Blair, Andaman Is., Bay of Bengal: in dead 
reef-coral with Cliona lobata and C. mucronata. 
Thoosa hancocci, Topsent. 
1915. Thoosa hancocct, Annandale, Rec. /nd. Mus. Wh, pi Zr. 
The species is evidently common in dead coral in the Anda- 
mans. Specimens in Mr. Kemp’s collection all possess nodular 
amphiasters, but these spicules, which are confined to the papillae, 
are present only in very small numbers. In some papillae they 
are altogether absent, and there are never more than about half 
a dozen in any one papilla. These specimens, therefore, which 
