4 Prof. M'lntosh'ri Nuies from the 



lobe beneatli. lu the anterior and middle regions of the 

 body both dorsal and ventral divisions of the foot have only 

 capillary bristles. Hooks appear ventrally on the fifty-sixth 

 segment and dorsally on the sixty-first (Southern). The 

 dorsal hooks resemble flattened bristles with hooked tips. 



2. On the British Terebellidae. 



In Dr. Johnston's ' Catalogue of Non-Parasitical "Worms 

 in the British Museum,' twelve species of Terebellids are 

 entered, but four of these refer only to two species, viz, 

 Terebella lit t oralis and Terebella conchilega to the common 

 Lanice conchiliya, and T. nebulusa and T. tuherculuta to 

 T. nebulosa, Mont. On tiie other hand, it is pos>ible that 

 his Terebella constrictor includes two species. In addition 

 to the forms mentioned, Dr. Johnston^s list comprised 

 Amphitrite cirrata, Amphitrite jolmstoni, Nicolea venustula, 

 Leprtea textrix, N. maculutu, I'helepus cincinnatus, and 

 Terebellides stroenii. 



In his well-known 'Annulata Polychata' of Spitzbergen, 

 Greenhind, Iceland, and Scandinavia, Malmgreu in 1867 

 recorded thirty-one species ; but several are synonymous, 

 so that there were really about twenty-eight — not, after all, 

 a great number from an area so extensive, and one that had 

 been so frequently searched by skilful zoologists. 



The rich and comparatively unexplored region of the west 

 of Ireland, so far as regards Polychats, has lately produced, 

 by the broad views of the Irish Fisheries' Department and 

 in ]\lr. Southern's skilful and energetic liands, no less than 

 twenty species of Terebellids, or double the number entered 

 in the ' Catalogue of the British Museum.' Several of these 

 are additions to the British Pauna, and will be dealt with on 

 a future occasion. 



In the present preliminary notice of this important 

 family from British waters, the number approaches that of 

 Maluigren from the more extended northern area, and 

 it is probable that future researches will make additions 

 to the list ; indeed, several forujs are at present under 

 consideration. 



The first British species is Amjjhitrite cirrata, O. F. Miiller, 

 which ranges from Devon to Shetland. The cephalic plate is 

 comparatively adherent, for the dorsal collar is limited, and 

 the edge externally bends over into that of the supra-oral fold, 

 the whole plate being more limited than usual. A sub- 

 oral fold occurs within, and externally is the lower lip on 



