140 BRITISH SPONGIADJi. 



diameter. These fragments were dredged in West- 

 port Bay (N.). 



52. IsoDiOTTA Bableei, Bow., II, 333 ; iii, PI. LVII. 



53. ISODICTTA LACINIOSA, Bow., Ill, 219, PI. LXXV, 



figs. 1 — 5. 



1868 Isodictya laciniosa, Bowerbank. Last Report of Dred- 

 ging among tie Shetland Isles ; Norman on Porifera, 

 Brit. Assoc. Report, 1868 (1869), p. 333. 



Habitat. — A small specimen dredged by Dr. Gwyn 

 Jeffreys and myself in deep water in the Minch, and 

 now in my cabinet, was considered by Dr. Bower- 

 bank to be referable to this species (N.). 



54. Isodictya dubia, Boio., iii, 325, PI. XC, figs. 4 — 7. 



" Habitat. — ' Westport bay, 4 fathoms. Orange 

 coloured when aHve.' 



" I received two specimens of this species from the 

 Rev. A. M. Norman thus labelled. They are both 

 upon matted masses of slender fuci, one five inches in 

 length, and the other four inches, and in the lobu- 

 lated form and mode of disposition on the fuci they 

 very closely resemble the type-specimen represented 

 in PI. XO, 'Mon. Brit. Spongiadse.' The lobulous 

 form appears in most cases to be derived from the 

 sponge encasing short branches of the stems of the 

 fuci. On making transverse sections of some of the 

 lobes which had never undergone compression I found 



