1915. | N. ANNANDALE : Parasitic Sponges. 461 
The degree to which the spines are developed on the spherasters is, 
however, as variable as the proportions of their several parts 
Measurements of Spicules. 
Length of spiny macroscleres .. o'098—0'205 mm. 
Length of smooth macroscleres Ren (avekase) (0. h E> «,, 
Diameter of oxyasters .. 0°0126—0'0252 ,, 
Diameter of spiny spherasters .. (average) 00126 ,, 
Diameter of smooth spherasters ay Mee OLORLSNG 
Fig. 1.—Spicules of Coppatias investigatrix, sp.nov. 
Type.—No. 64 5/7 ZEV, Ind. Mus. 
Locality. —Off Ceylon in 703 fathoms: with Thoosa investigat- 
ovis in a dead Gastropod shell (in alcohol). 
At points at which the Coppatias comes in contact with the 
Thoosa, the latter secretes a thick horny covering through which the 
tips of its own macroscleres penetrate (pl. xxxiv, fig. 2). 
