ADDENDA AND COKRIGENDA. 343 



Page 197, loida macrophthalma, for Plate XIV. read Plate 

 XIV. a. 



Page 210, Cirratuliis tentaculatus, after (a) South Devon, G. Mon- 

 tagu, add (h) Falmoutli, W. P. Cocks; {c-g) Polperro, Cornwall, 

 LKiughrin. 



Page 212, Cirratulus boreaHs, after (a) South Devon, O. Montagu, 

 add (b) Falmouth, W. P. Cocks ; (c, d) Berwick, Dr. Johnston (^Cir-- 

 ratulus flavescens, Johnst.) ; {e-k) Polperro, Cornwall, Laitghrin. 



Page 212. Introduce here, before Genus DODECACERIA, 

 Genus AONIS, Savigny (Avd. 6f Edw.). 



Tentacle one, or none ; tentacular cirri wanting ; setiferous pro- 

 cesses of all the segments similar, two -rowed ; branchiae short, lancet- 

 or tongue-shaped. — Grube. 



Sp. 1. Aonis vittata. 



Aonis vittata, Grube, Famil. der Anneliden, p. 69. 



One median tentacle; branchiae lingulate, at first leaving the 

 greater part of the back free, wrinkled on the outer margin, after- 

 wards gradually lengthening and becoming fihform. — Grube. 

 Hab. Scotland and England. 



{a) Loch Goil Head, Firth of Clyde, D. Robertson. 



(6) Polperro, Cornwall, Laughrin. 



Page 214, before Tribe II. LIMIVOKA, introdw^e 



Family CHiETOPTERID^. 



Body vermiform, somewhat cylindrical or depressed, consisting of 

 several differently formed divisions, which are again subdivided into 

 segments. Head-lobe flat and short, with two tentacula on the 

 underside. Buccal segment furnished with pinnules. Mouth directed 

 forwards ; trunk (proboscis) wanting. Lateral processes of the seg- 

 ments consisting of simple pinnules armed with a row of flat bristles, 

 but not present on all the segments. — Grube. 



Genus CH^TOPTERUS, Cuvier. 



As there is only one British genus belonging to this family, the 

 characters given above will suffice. 



Sp. 1. Chsetopterus insignis. 



Chsetopterus insignis, Baird, Trans. Linn. Soc. xxiv. 477. tab. xlix. 

 f. 1 & 2. 



Anterior portion of the body square-shaped, broad, flattened, or 



somewhat convex on the ventral surface and slightly concave on the 



