ISODICTYA. 135 



description, and in I. jugosa there are no internal 

 defensive spicula. 



" This species appears to be rather abundant at the 

 locality from which Mr. Norman obtained it, but I 

 have not received specimens of it from any other place." 



38. ISODICTYA INFUNDIBULIFORMIS (Johnston), n, 317 ; in, 

 PI. LIV. 



1867 Tragosia infundibuliformis, Gray. Proc. Zool. Soc., 



p. 513. 

 1876 PhaJcellia infundibuliformis, Carter. Ann. Nat, Hist., 



ser. 4, vol. xviii, p. 240. 



Habitat. Deep water in the Minch (N.). Mr. 

 Carter (1. c.) records this sponge as having been pro- 

 cured in the "Porcupine 5 Expedition of 1869 down 

 to a depth of 345 fathoms. 



The ordinary size of this sponge when fairly grown 

 is about four inches high, and five or six inches in the 

 diameter of the cup. My largest example, however, is 

 nine inches across the lips of the cup and four and a 

 half inches high. This has a simple crateriforra 

 shape, but another, which is seven and a half in dia- 

 meter, divides a little above the base into seven fan- 

 shaped lobes, which expanding overlap each other in 

 regular order, so that the whole make a shallow but 

 well-formed cup. 



39. ISODICTYA DISSIMILIS, Sow., n, 318 ; m, 139, PL 

 LY, figs. 13. 



1867 Tvagosia dissimilis, Gray. Proc. Zool. Soc., p. 513. 

 This is one of the only British sponges which 



