BRITISH NEMERTEANS, AND SOME NEW BRITISH ANNELIDS. 423 



for the bristles agree with those of A. sundevalli in having the winged portion 

 striate, while the hooks are widest in the middle (Plate XIV. fig. 14), and there 

 are but fifteen hook-bearing processes posteriorly. A boreal form, not uncommon 

 in the Scotch seas, is Ampharete artica, Malmgren, the hooks in this species 

 being furnished with a large number of teeth (Plate XIV. fig. 13). The former 

 examples possess frontal bristles, but two species in Mr Jeffreys' Hebridean and 

 Zetlandic collections have none. The first is the Sabellides sexcirrata, Sars,* 

 wherein the hooks have for the most part five teeth, though some of the larger 

 have six (Plate XVI. fig. 16 a and 16 b). Occasionally one occurs in the centre 

 of the row with only four large teeth. The other species was in a very imperfect 

 state, but seems to be an Amage, Mgrn., having about fourteen bristle-bundles on 

 each side, somewhat club-shaped smooth tentacles, and the ventral bars very 

 distinctly marked. The hooks (Plate XIII. fig. 10 and 10 a) have four or five 

 teeth, and differ so much from A. auricula, Mgrn., that in all probability the 

 animal is distinct. 



The descriptions of the British Terebellce given in the Catalogue of the British 

 Museum stand very much in need of revision, it. being difficult, indeed, in some 

 cases to understand what species is meant. Thus T. conchilega could not be 

 identified from the characteristics there noted. The T< nebulosa of Dr Johnston 

 is not that of Montagu, but a very different form, with 24 pairs of bristle-bundles 

 (he says 23), and well-marked hooks, with the chief fang very long and several 

 smaller processes above it. It may be remarked in passing, that in such a profile 

 view all the small hooks on the crown are not seen, and hence the armature is 

 greater than at first sight appears. This species attains a very large size on our 

 western shores. Dr Malmgren| proposes for it the name of Ampliitrite John- 

 stoni, but Sir J. Dalyell had long previously called it T. figulus.\ The true 

 T. nebulosa is described in the Catalogue under T. tuberculata, Dalyell, and 

 Montagu's name, at any rate, must stand instead of Malmgren's recent title, 

 T. debilis. The hook of this species has two very distinct fangs and a greatly 

 elongated base. 



In addition to the twelve species mentioned in the Catalogue no less than 

 eight new British forms require notice. In Terebella (Nicolsea) zostei'icola, (Erst., 

 a very abundant species, the hooks (Plate XV. fig. 15) are furnished with a single 

 fang above the large one, and in some cases with a trace of a second. Pista 

 cristata, Muller, a species with a single pair of whorled branchiae, was first got at 

 Lochmaddy, and since at various parts of the coast; its hooks are characterised 

 by the singular form represented in Plate XV. fig. 20, with three or four prongs 

 above the chief fang, and a powerful process for the ligament at the posterior end 



* Fauna litt. Norveg. ii. p. 23. t Nord. Hafs-Ann. p. 377. 



X Pow. Creat. vol. ii. p. 191, pi. xxvii. figs. 1 and 2. 



