348 MK. ALBANY HANCOCK ON 



Since the publication of my former paper a few additional speci- 

 mens have occurred on the Northumberland coast, and one in an 

 oyster shell, probably from Scotland. 



C. vastifica. PL XVI, fig. 2. 



Spicula of three kinds : the first pin-like, -gVth of an inch in 

 length, straight, rather slender, and diminishing imperceptibly 

 to a very fine point at one end, the other terminating in a per- 

 fectly globular head : the second kind is about one-third the 

 length of the first, and is much thinner ; it is stoutish in the 

 centre, where it rather suddenly bends a little, and from thence 

 tapers gradually towards the ends, which are sharply pointed; 

 it is throughout minutely spined, but in some instances the spines 

 are sufficiently strong to be observed with the ^th of an inch 

 object glass : the third form is - a -rVo^ of an inch long, cylindrical, 

 irregularly lent or angulated once or twice, occasionally three times, 

 having a central angle, and is strongly spined; the extremities are 

 obtuse. 



Several specimens have recently occurred in oyster shells, but 

 the locality is not known. "When dry the sponge is of a yellow- 

 ish-white colour. There are both large and small papillae in this 

 species ; the former are three times the size of the latter, and are 

 scattered at wide intervals amidst the others. 



C. COKALLINOIDES. PI. XVI, fig. 3. 



Spicula of three kinds : the first, rVth of an inch long, is pin- 

 like, slender, generally bent in the centre, tapering gradually to 

 a sharp point at one end, and at the other furnished with a well- 

 defined, elliptical head : the second kind is scarcely one-third the 

 length of the first; it is fusiform, very delicate, and suddenly 

 bent in the centre, and when observed under the ith of an inch 

 object glass is seen to be minutely spined; the extremities are 

 sharply pointed : the third form is minute, being only -o- Vo^ of an 

 inch long ; it is spinous, with the extremities obtuse, and is generally 

 zigzagged, having three angles, one being in the centre. 



A year or two ago, Mr. H. T. Mennell obtained, at the Isle 



