8 Prof. M'lntosh's Notes from the 



axis, and tapers to a short, slenrler, filiform tip, which, how- 

 CAcr, is usually euveloped by the long pinnae or is in screw- 

 like coils. The pinnae have the translucent axis, as in 

 ^. pcnuitiiis, with long joints, and are richly ciliated. In 

 life the branchiie are of a pale green marked -vrith white 

 touches, so that they form a whitish ring around the collar 

 A\ithin Mhich they are attached. The pinnie are variegated 

 with pale greeni^h and white, and show vermiform move- 

 ments when cast off. lu some the branchiae are of a pale 

 buff" hue, with a little yellow at the tips of the iilaments. 

 lu contraction they are generally ot" a dull stone-colour. 

 Leuckart's examples had whitish branchiae with brownish 

 touches, and De St. Joseph describes his examples as 

 vinous-brown. Sars states that his specimens had yellowish- 

 white branchiae Mith four or five orange bands. Just above 

 the Mhitish ring at the base most of the filaments, externally, 

 have two boldly marked and elevated brown or reddish- 

 brown ocular specks, separated by an interval from each 

 other. De St. Joseph states that in his specimens each 

 contained about thirty ovoid *" crystallines '' in a mass of 

 brownish pigment. Moreover, the eyes of those from the 

 Mediterranean are more numerous than those from the 

 north, whilst Marion consiileretl that tho^e from deep water 

 had fewer eyes than the littoral forms. Tliey are absent in 

 a few of the filaments. The longest filaments are dorsal, 

 those at the ventral edge being considerably shorter and 

 jslightly refiexed. The ocular jugment in some fades in 

 spirit. The tentacle is comparatively short, but its mem- 

 branous web on each side appears to agree with that in 

 ^iiLtlln penicUlus. 



The iuily is comparatively short — about | of an inch in 

 length — and has from CO to 100 segments. It is rounded 

 dorsaily, slightly tiattened ventrally, and marked by a 

 groove which at the tenth segment bends frum the side 

 inward to the middle line and divides all the scutes which 

 follow into two. The nine or ten scutes in front of these are 

 split transversely. The ventral scutes are conspicuous by their 

 vhitisli or pinkish colour, and are even visible through 

 certain parts of the tube. Anteriorly the brownish dorsum 

 is marked with dark browu pigment at the bases of eleven 

 setigerous processes, the succeeding region of the dorsum 

 being reddish brown. The body is paler in the median line 

 dorsaily and ventrally. It is slightly tapered posteriorly, 

 and ends in a papillose anus, three papillae being distinct, 

 and the colour of the tip is orange rather than brown. 



The setigerous processes are ranged along the lateral 



