On the Spongozoa of Ilalisarca Dujardinii. 315 



Genus Pelonaia, Forbes & Goodsir. 



Pelonaia corrugata^ Forbes & Goodsir ; F. & II. Brit. Moll, 

 i. p. 43, pi. E. f. 4. 



Frequent in deep water, and occasionally in the stomachs 

 of the cod and haddock. 



[To be continued.] 



XLII. — On the, >S^wn_^04;oa o/" Halisarca Dujardinii. 

 By H. J. Carter, F.K.S. &c. 



In the 'Annals ' for last year (vol. xii. p. 17) I published a 

 paper on two new species of Gummineae, with special and 

 general observations. I had not then %t&u.Halisarca Dujardinii 

 of our shores, but have since met with it several times, always 

 small, never more than from a quarter to three quarters of an 

 inch in diameter. 



I have also stated somewhere lately, with reference to the 

 spongozoa, that what I claim is not to have shown that they 

 were ciliated, but that they took in crude food and threw off 

 the undigested portions like Amceha. This I have now also 

 proved to be the case in Halisarca Dujardinii^ in the following 

 manner : — 



Yesterday (March 19th) I went to the rocks here (Budleigh- 

 Salterton), and found a specimen of Halisarca Dujardinii^ 

 about a quarter of an inch in diameter, on a bit of dead stick 

 about the size of a tobacco-pipe. The stick was cut off to a 

 convenient length and placed in sea-water; and thus, the 

 following morning, it was brought under an inch compound 

 power, when, seeing the particles of refuse matter actively 

 issuing from the vent, I rubbed up a little indigo also in sea- 

 water and, with a camel-hair brush, dropped it on the speci- 

 men, leaving it there about an hour, until I saw particles of 

 the indigo itself issuing from the vent. 



The water was then agitated so as to float away the super- 

 incumbent indigo, when it was observed that some of the Hali- 

 sarca had become deeply coloiu*ed by it. 



Now, taking off a portion of the coloured part, and tearing 

 it to pieces with needles on a slide in sea- water, this was covered 

 with a bit of thin glass, and placed under a ^-inch compound 

 power. 



Thus the spongozoa of the Halisarca were brought into 

 view. Some were isolated, others still remaining in their 



