Gutty Marine Laboratory^ St. Andrews. 101 



ventral ridjje^ the latter being a modification of the eon- 

 ueeting-ridge. The imcinigerous lamella is bi-auriciilate, 

 and remains so to the end. The last four or five feet, ho^v- 

 ever, are modified, so that only the bi-auriculate uncinigerous 

 process remains. 



The posterior border of the caudal segment is either 

 arcuate or smooth, according to the condition as regards 

 reproduction. In those recentlv^ reproduced or in process of 

 reproduction, it is arcuate, but in entire examples it appears 

 to be smooth. Tlie cirri are lateral in position and of con- 

 siderable size. 



The tube is composed of mud with a lining of secretion, 

 and has various fragments of shells, spines of Spatangus, 

 sand, and minute pebbles adherent or mixed with the mud. 

 The inner secretion, when first exuded, and before being 

 coated with mud and debris, is very tough. The large 

 example from 640 fathoms had its tube thickly coated with 

 mud only. In the Irish example (S.W. Ireland, 18 So) the 

 fragments of shells are imbedded transversely in the thick 

 muddy coating of the tulje, giving it a heavy and dense 

 character. The tube is placed vertically in its native site. 



An excellent description of this form is given by Fauvel 

 (1897) both in regard to external and internal structure. 



The Aniphicteis curvipalea of Claparede *, a form subse- 

 quently procured on the shores of France by De St. Joseph 

 and at Plymouth by Allen f, is, so far as can be made out 

 from the descriptions and an example from Plymouth kindly 

 sent for examination by Dr. Allen, an average specimen of 

 Aniphicteis gunneri, and Fauvel had formerly come to the 

 same conclusion. 



The third species is Sabellides octocirrata, Sars, procured 

 off the Ilcijrides and Ireland. 



The Ilebridean example is small and presents anteriorly 

 a bluntly conical snout, from which the tentacles have been 

 removed, but in the Irish specimen they are provided with 

 long and proportionally thick papillce or " cilia,^^ which, 

 however, are devoid of a central axis. The tip in the 

 preparation has a 'Miairy" aspect, as if from numerous 

 palpocils. Moreover, the papillae extend nearly to the 

 extremity, only a short granular portion projecting beyond 

 them. The size of these papillie seems to be a feature of the 

 species. 



* Aniiel. Xa]>. Suppl. y. \:V2, pi. xiii. \\\x. ■">. 

 t JoLun. M. Jl A. N. S, v/l. viii. p. 2.3U. 



