238 Miss Jane Stephens on 



Tliey lijive a sliglitly curved sliaft and a liead wliich is 

 thickly covered witli short blunt spines. A few small re- 

 curved spines are scattered alons; the shaft, soniotitnes to 

 nearly halt' its length. The shorter acantliostyli are 0"11- 

 0"13 mm. in length by O'OOG mm. The shaft is straight, and 

 the head is, at the most, very slightly marked, and is covered 

 with rather long blunt s{)ines. The shaft is s[)ined throughout 

 its length. (2) The dermal spicules are slender strongyla 

 measuring 0'22-0'25 mm. in length by 0*0025 mm. 



Microscleres are absent from the sponge. 



The species was dredged in 37 fathoms off lieenacry Head, 

 Co. Kerry. 



Ectyodoryx atlanticus, sp. n. 



Tiie sponge is coating a piece of coral. 



The main skeleton consists of a network of large acantlio- 

 styli, lying usually three or four together, sparingly echinated 

 by small acanthostyli. A small quantity of spongin is 

 present. The dermal spicules form thick fibres, but the 

 exact arrangement cannot be made out owing to the injured 

 surface of the only specimen available. 



Spicule-^. — (1) The large acanthostyli have a slightly 

 curved shaft. The head is swollen and is covered with short 

 blunt spines. A few spines are sometimes scattered along 

 the shaft for a short distance. On the other hand, some of 

 the spicules are almos;t quite smooth. These spicules measure 

 about 0'66-0'95 mm. in length by 0"015-002 mm. in dia- 

 meter above the head. (2) The echinating acanthostyli are 

 small and few in number. The shaft is straight; the head 

 is a little swollen and is covered with rather long spines. 

 Tlie shaft is thickly set with small recurved spines. The 

 length is 0*1-0'14 mm. by 0*01 mm. above the head. 

 (2) The dermal spicules are strongyla with rather unequal 

 ends, one end being slightly thicker than the other. The 

 shaft is often a little crooked. Length O'-ir-O'b mm. by 

 0006 mm. (3) Isochelae arcuatoe. The shaft is rather 

 strongly curved. Length 0045-0'06 mm. 



Tlie species was dredged off the soath-west coast of Ireland 

 in 468 fathoms. 



Eurypon acantkotoxa, sp. n. 



The sponge is growing in a small, thin encrustation on 

 coral. 



The main skeleton consists of acanthostyli which stand 

 vertically with their heads on the substratum. Tiie dermal 



