ISODICTYA. 115- 



Genus 22.— Isodictya, Bow., i, 197 ; ii, 9. 



1. ISODICTTA CINEEEA (Grant), II, 274 J III, 121; PI. 



XL VIII, figs. 1—5. 



Habitat. — Apparently universally distributed round 

 our coasts. In addition to the many localities recorded 

 in Volumes ii and iii, I have found it at Guernsey ; 

 Seaham Harbour, in the County of Durham; on Nulli- 

 pora, Roundstone and Birterbuy Bays, Co. Galway; 

 and Westport Bay, Co. Mayo (N.). 



For " Chudleigh Salterton," vol. ii, p. 276, line 4, 

 read " Budleigh-Salterton," and p. 276, line 27, for 

 " Seahouse" read " Seaham." 



2. IsoDiCTTA PEEMOLLis, Bow., II, 278; III, 123; PI. 

 XL VIII, figs. 9, 10. 



3. ISODICTYA MAMMEATA, Boil)., II, 306; III, PI. LI, figS. 



7—9. 



4. ISODICTXA EAMUSOULUS, Bow., 11, 314 ; III, PI. LIII, 

 figs. 1—3. 



Habitat. — Several small pieces, of which the largest 

 is three quarters of an inch long, half an inch wide, 

 and as much thick, and has five oscula surmounting 

 nipple-like swellings, found between tide marks, Innis- 

 gowla, "Westport Bay, Co. Mayo. Colour when alive, 

 pale violet. It is an erect growing species (N.). 



