ON A NEW SPECIES OF SYCANDRA. 367 



Explanation of Plate X. 



Fig. 1. Sycandra asperay n.ap., x 8 diameters, a. Super- 

 ficial layer sloughed, and shewing the openings 

 of the ciliated chambers. The natural size is 

 indicated at the side. 



Fig. 2. Semi-diagrammatic transverse section of the body. 

 a. Ciliated chamber ; h. syncytium. 



Fig. 3. Body-wall, transverse section, x 50 diameters. 

 a. Club-headed spicules, h. Needle-shaped spi- 

 cules ; c. connective tissue cells ; d. triradiate 

 spicules ; e. cavity of ciliated chamber, with 

 epithelium wanting; /. do. do. with epithelium. 



Fig. 4. Part of wall of a ciliated chamber, X 300 diameters. 

 a. Connective tissue cells ; h, epithelium. 



Fig. 5. Triradiate spicule, large size, x 60 diameters. 



Fig. 6. Club-headed spicules, x 60 diameters. 



Fig. 7. Triradiate spicule, small size, x 60 diameter. 



