184 ANATOMICAL DESCRIPTIONS. [DecWiiib^f. 



interior conformation of this animal is similar to that df 

 the preceding; one equally remarks a stomach, platted 

 longitudinally, and transversely, supported in tlie centre 

 by a great number of membranes, which are prolonged 

 from the sun^imit to the base, twenty-seven of which are 

 entire, and support the serpentiform ovaries, wliich -h^ve 

 their orighi at a thick, cylindric, striated, arcuated ot'gan: 

 this organ is prolongated, and attached to the inferior aper- 

 ture of the stomach. A section of this animal, cut hori- 

 zontally, presents us with the peculiar disposition of the 

 interior membranes, which will be better comprehended 

 by a Reference to the figure in the plate, than by a verbal 

 detail. 



Corticifera glareola, (Plate VIII. fig. 8, 9.) One ob- 

 serves in this species an analogous organization to that 

 of the foregoing. This organization is enclosed in cel- 

 lules, which are short, cylindric, composed of sand, 

 agglutinated by a gelatinous substance. These cellules 

 are slightly contractile at their aperture, which h situate 

 at a small button in the centre. The base, whereon these 

 cellules are placed, is composed df sand, labdut oile third 

 part of the height of the cell. The interior of the cell is 

 divided by eighteen or twenty white filaments, which ex- 

 tend from the summit to the base. They adhere to a trans- 

 parent membrane, which guards the interior of the cell. 

 In the centre is a cylindric, plaited organ, open at both 

 ends, supported by the membrane which bears the ovaries. 

 From the lower aperture of this organ, extends another, 

 which is thick, striated in annulations, and arcuated. The 

 ovaries are very conspicuous, and united at their base; 

 they are protected by white filaments, Which border the 

 membrahe of the interior, towards the centre of tlie ani- 



