306 Dr. W. C. M'Intosh oti the 



Genus Carbasea, Gray. 



Carhasea pa2}p'ea, Pallas ; Busk, Catal. p. 50, pi. 50. f. 1-3. 

 After storms, and from the fishing-boats ; not abundant. 



Family Membraniporids3. 

 Genus Membeanipora, De Blainville. 

 Memhranipora meinbranacea, L.; Busk, Catal. p. 56, pi. 68. f.2. 

 Abundant ou the fronds of Laminaria digitata and other 

 algSB. 



Memhranipora pilosa, L. ; Busk, Catal. p. 56, pi. 71. 

 Very common on the stems and fronds of Dehsseriai, Lami- 

 narice^ and other seaweeds between and beyond tide-marks, 

 and on shells and stones from the coralline ground. 



Memhranipora Flemingu, Busk ; Catal. p. 58, pi. 61. f. 2, 

 pl.84.f.4-6, pl.l04.f. 2-4. 



Common on stones and shells from the coralline ground. 



Memhranipora Lacroixii, Sav.; Busk, Catal. p. 60, pi. 69, 

 pi. 104. f. 1. 



On the inner surface of a valve of Gyprina islandica from 

 deep water. 



Memhranipora spinifera^ Johnst. ; Alder, Catal. Zooph. p. 53, 

 pi. 8. f. 2, 2 a. 



Abundant on the under surface of stones between tide- 

 marks. 



Memhranipora DumerilUi^ And. ; Alder, Catal. Zooph. p. 56, 



pi. 8. f. 5. 



Not uncommon on bivalves from deep water. As Mr. Alder 

 observes, it may occasionally be seen in company with M. 

 Fleviingii. 



Memhranipora unicornis^ Flem. ; Alder, Catal. Zooph. p. 56, 

 pi. 8. f. 6. 



On bivalves from deep water ; not very common. 



Memhranipora craticula^ Alder ; Catal. Zooph. p. 54, pi. 8. f. 3. 

 Occasionally in deep water. 



