239 



2 cm., length of stalk .5 cm., and thickness of wall about 

 1.2 mm., not including the glassy bristles which extend about 

 I mm. beyond the outer surface. 



The specimens, which look like small Hexactinellids, are 

 probably in an early stage of growth, and, if this be so, would 

 possibly grow to resemble, in outward appearance, the variety 

 described below. 



Kalastrella vasiformis, var. mitwr. 

 Plate v., F"ig. 4. Plate VI., V'lg. 4a-c. 



Sponge pedicellate, sub-caliculate, with a finely papillated 

 surface of greyish purple hue. Pores in cribriform areas 

 between the papillae on the outer surface ; oscules i mm. in 

 diameter on the inner surface. 



Spicules. Megascleres. — Tyles frare) as in the t)^ical form. 

 Oxeas and styles of uniformly smaller size than in the type ; 

 style 860 X 26 /* ; oxea, 1200 x 26 f. 



Microscleres. — Euasters of all sizes up to 60 /* in diameter, 

 with centrum 11 /<, similar in character to those of the typical 

 form. 



Locality E. — Cone Point, Natal ; depth, 34 fms. ; bottom, 

 broken shells. 



The one specimen is shaped like a funnel incomplete on one 

 side, the height being 7 cm., width 2.5 cm., and thickness of 

 wall 4 cm. The stalk is 2.5 cm. in length and 8 mm. in 

 thickness. 



It might be supposed that the variety was merely the fully 

 grown condition of the typical form, and that in course of 

 growth the ectosome of the latter would become much thicker 

 and darker ; but apart from the differences in form and colour, 

 the uniform and great difference in size of the oxeas and styles, 

 which are much smaller in the variety, constitutes a well-marked 

 varietal distinction. 



Family CoppatiidaB. 



Genus Coppatias (Sollas). 



Coppatias baeulifer, sp. n. 



Plate v., Fig. 5. Plate VI., Fig. 5a, b. 



Sponge massive, irregular in shape. Surface rough ; texture 

 hard, almost stony ; colour, in dry state, reddish brown ; lighter 

 in section. Oscules 1-2 mm. in diameter, forming irregular 

 cribriform areas ; pores not visible. 



