known Species o/" Spongilla. 89 



gile, fibrous, like that of S. lacustris. Skeleton-spicule 

 curved, fusiform, gradually sharp-pointed, smooth, often 

 inflated in the centre. Statoblast spherical (fig. 5) ; apertures 

 in plurality (one to five) (fig. 5, c c c cc), on a level with the 

 chitinous coat (fig. 5, r«), as there is no apparent crust; sur- 

 rounded by a layer of minute, curved, fusiform, sharp-pointed, 

 spinous acerates, which are in contact with the chitinous coat, 

 arranged tangentially (ri^. 5, h and d) . 



Loc. Chiluk-weyuk Lake, British Columbia, lat. 49° 10' N., 

 long. 121° 22' W. 



Type specimen in the British Museum, presented by 

 Dr. Lyall. Eegister no. 64. 8. 11. 1-10 ; running no. 239. 



Obs. As the statoblasts, although very numerous, are all 

 empty, it is probable that the germinal matter has passed out 

 of them, and therefore that they are only the effete remains of 

 this organ, although still covered by the statoblast-spicules, as 

 represented in the illustration. 



8. Sponqilla Lordii, Bk. 

 (PI. VI. fig. 13, a-f,) 



Spongilla Lordii, Bk., No. 20, p. 28, pi. xxxviii. fig. 17. 



Sessile, incrusting reeds (fig. 13,/); surface even. Struc- 

 ture fragile, crumbling. Colour light brown. Skeleton-spicule 

 curved, fusiform, gradually sharp-pointed, smooth, often inflated 

 in the centre. Statoblast hemispheroidal, flat bottle-shaped, 

 forming a single layer in juxtaposition round the reed, under- 

 neath the sponge, with the aperture upwards (figs. 13 and 13/); 

 chitinous coat hemispheroidal (fig. 13, a) ; aperture prolonged 

 from the summit by a short tubular extension (fig. 13, b, c) ; 

 colour dark amber, followed by a thin granular crust charged 

 with small curved, fusiform, spined acerates, round at the 

 extremities, arranged tangentially (fig. 13, d and e). 



Loc. Lake Osogoos, Cascade Mountains, British Columbia. 



Type specimen in the British Museum. Register no. 68. 8. 

 17. 1-7 ; running no. 211. Presented by J. K. Lord, Esq. 



9. Spongilla mtens, Carter, n. sp. 

 (PI. V. fig. 3, a-k, and PI. VI. fig. 18.) 



Form of sponge unknown to me. Structure reticulate; 

 fibre rigid, composed of bundles of spicules united by trans- 

 parent colourless sarcode, which in the dried state gives 

 it a hardness and vitreous appearance like that of Spongilla 

 corallioides, Bk. Skeleton-spicule curved, cylindrical, smooth, 

 sometimes very slightly inflated in the centre and at the ex- 

 tremities, which are round (PI. VI. fig. 18). Statoblast glo- 



