08 Prof. M'lntosli's Notes from the 



tinguished by the absence of bristles and the elongated 

 nature of the lamellae for the hooks and of the cirrus, as 

 well as by the great antero-posterior diameter of the seg- 

 ments in relation to their transverse. Each bears laterally 

 the slender tapering cirrus, and beneath it the small elon- 

 gated lamella for the hooks, which are considerably smaller 

 than those in front, but have a similar structure. If anytiiing 

 they are shorter and broader than those of the anterior 

 region, and show five or six teeth and a rounded prow. 



The general colour of a Zetlandic example is pale oraniic 

 anteriorly from the wall of the gut, whilst the posterior 

 region is pale with the brownish line of the intestine. The 

 processes anteriorly are of a pale amber hue. 



Fauvel found gregarines in the alimentary canal. This 

 author's account of the external and internal structure of 

 Ampharete gruhei is both comprehensive ajid complete. 



Prof. Fauvel'^' (1901) severely criticises the statements of 

 M. Cosmoviei concerning the segmental organs, especially 

 his view that when the nephridia do not carry the repro- 

 ductive elements externally they do not communicate with 

 the coelora by a ciliated funnel, and that uheu present the 

 latter do; s not open into the preceding segment. Fauvel 

 especially quotes his observations on the nephridia of Am- 

 pliarete grubei, in which only two pairs occur, viz., one 

 piercing the anterior thoracic diaphragm, the other behind 

 it. The former is solely excretory, the latter gives passage 

 to the genital products, 



A careful account of the tube of this species and its 

 formation is given by Fauvel (1897). It is composed of 

 shell-fragments and secretion, and is placed vertically on the 

 bottom, one half with thinner walls immersed in the sand 

 and one part with thicker walls projecting from the surface. 



The next form is Amphicteis ffunneri, Sars, which ranges to 

 deep water off the British coasts, and in the neighbouring 

 Atlantic goes to G-10 fathoms. In this the cephalic region is 

 somewhat shiel(l-sha[)ed dorsaliy with a rounded l)oss on each 

 angle anteriorly and a median groove. A prominent fillet of 

 the buccal segment bounds it laterally and, converging to a 

 median dimple, guards it posteriorly. On c;>ch side, at the 

 commencement of the posterior slope, is a minute eye, indis- 

 tinct in most spirit- preparations. A dimple in tiie fillet 

 o[)[)osite the eye-speck inere;i.'«cs its range. Posteriorly is 

 the nuchal organ with pigment-specks in front. The buccal 



♦ Bullet. Sc. France et Belijiqiie, t. xx.xvi. p. 107. 



