420 DR W. CARMICHAEL M'lNTOSH ON THE STRUCTURE OF THE 



tial change in regard to the inferior appendages of the feet. As contrasted with 

 the common species, the joints or transverse markings of the bristles are much 

 more boldly indicated in this form, especially in those from the inferior fascicles 

 (Plate XV. fig. 13 b). The latter bristles (inferior) are shorter than the superior, 

 and both, as usual, have larger joints than the anterior series. A second repre- 

 sentative of the family (Siphonostoma buskii, n. s.), from the Minch, off Lochmaddy, 

 North Uist, is remarkable for its deep-red colour throughout, a hue so unusual 

 in the group. The two long tentacles or palpi are pale, but the branchial fila- 

 ments are deep red. The surface of the body is furnished with minute papillae, 

 which have the enlarged terminal portion furnished with a knob at the tip. The 

 hooks (Plate XVI. fig. 4) differ very much from those of S. uncinata, in so far as 

 the shaft is much longer and less robust, and the terminal claw more elongated, 

 and abruptly curved. When the latter breaks off, it separates obliquely at a, a 

 little above the articulation, leaving the short spike through which the dotted 

 line passes. A bristle is shown in fig. 4 #, and a fragment more highly magnified 

 in Plate XV. fig. 13 a. 



Maldanidce. — Two species of this family (CIpmene, Quatref.) are mentioned 

 as British by the authors of the Catalogue, both of which are of doubtful identity, 

 and apparently referable to the common Cbjmene lumbricalis, Fabr. * (Nicomaclie 

 lumbricalis, Mgrn.), though this is by no means certain. MrE. R. Lankester, in 

 his list of the Annelids collected at Guernsey! in 1865, notices a third species— 

 viz., the Clymene amphistoma of Savigny. The explorations of the coast line in the 

 Hebrides, and dredging in the surrounding seas by Mr Jeffreys and myself, as 

 well as the cruise to the Shetland Islands last summer by the former experienced 

 investigator of our seas, have considerably augmented the number of the British 

 representatives. One of the most remarkable species is the Rliodine Loveni, 

 Malmgren,| which combines an entire anal funnel, with a pointed snout, and has 

 its characteristic hooks (Plate XV. fig. 16) in a double instead of a single row, thus 

 materially differing from the others pertaining to the family. The outlines of the 

 hooks of the British species differ insome details from those represented by Dr 

 Malmgren — a discrepancy in all probably due to the inaccuracy of his artist. The 

 Axiothea catenata, Mgrn.,§ was dredged recently by Mr Jeffreys, off St Magnus 

 Bay, Shetland, in 80 to 100 fathoms. Besides having an infundibuliform anal 

 funnel, with alternate longer and shorter filaments, the base of the cup is marked 

 exteriorly on the ventral surface by a continuation of the median line. There are 

 about forty processes on the margin of the funnel, a smaller one, and sometimes two, 

 occurring between the longer filiform divisions. The base of the funnel is surrounded 



* Faun. Groenland. p. 374. t Annals Nat. Hist. May, 1866. 



+ Nordiska Hafs-Annulater, &c. 1865, p. 189 ; and Annulat. Polychseta, &c. p. 99, tab. x. 

 fig. 61 



§ Annulat, Polychtet. p. 99, tab. x. fig, 59. 



