known Species o/" Spongilla. 95 



7. Meyenia Baileyi. 

 Sponyilla Baileyi, Bk., No, 20, p. 13, pi. xxxviii. fig. 6. 



Coating, surface smooth. Structure friable, crumbling. 

 Skeleton-spicule curved, subfasiform, gradually sharp-pointed, 

 smooth. Flesh-spicule minute, curved, fusiform, gradually 

 sharp-pointed, covered with erect obtuse spines throughout, 

 extremely small towards the extremities, and extremely long and 

 perpendicular about the centre of the shaft. Statoblast globular ; 

 aperture infundibular ; crust, wliich is thick and composed of 

 granular cell-substance, charged with birotulate spicules consist- 

 ing of a long, straight, sparsely spiniferous shaft whose spines 

 are large, irregular in length, conical and perpendicular, termi- 

 nated at each end by an umbonate disk of equal size deeply 

 but regularly denticulated, whose processes are claw-like and 

 turned inwards, arranged perpendicularly, with one disk rest- 

 ing on the chitinous coat and the other forming part of the 

 surface of the statoblast. 



Loc. New York. In a stream on the Canterbury Road, 

 West Point. 



Ohs. This seems to be the North-American representative 

 of the Bombay species, viz. Meyenia plumosa, but with globu- 

 lar, not elliptical, statoblast. 



8. Meyenia anonyma, Carter, n. sp. 

 (PI. VI. fig. 12, «-/) 



Sponge unknown. Statoblast flask-shaped (fig. 12) ,• aper- 

 ture terminal (fig. 12, c) ; composed of a membranous coat 

 striated longitudinally (fig. 12, a), supporting a reticulation 

 (fig. 12, b) consisting of extremely minute, erect, conical 

 processes with their sharp ends inwards, and presenting in the 

 centre of each interstice, especially towards the fundus, a short, 

 thick, somewhat hourglass-shaped spicule whose outer end is 

 more or less denticulated, and whose inner one is inserted into 

 the striated coat (fig. 12, d, e). Investing membrane of the 

 germinal matter transparent, presenting the usual polygonal 

 reticulation without granules, like compressed cell-structure 



(%• 12,/). 



Loc. River Amazons. 



Obs. Of this statoblast, which is indicative of an undescribed 

 species of Spongilla^ I can state nothing more than that its 

 presence appeared to me to be an accidental occurrence on the 

 surface of another species which had grown over the surface 

 of a leaf sent to me by Dr. Dickie. 



8* 



