30 Piof. M'Inlosh's Notes from the 



out, wliilst the margin is formed by the collar, whicli presents 

 a lateral notch, in the form either of a slit or a shallow 

 excavation, which divides the reflected and somewhat 

 triangular ventral lobes from the rest of the rim, and they 

 are separated from each other by a wider gap in the mid- 

 ventral line. In large examples a dark speck occurs on each 

 side of the surface external to the pear-shaped enlargement, 

 and a dark speck on each side of the dorsal collar. A patch 

 of dark brown pigment also is present in some on the edge 

 of each reflected lobe. When the annelid withdraws itself 

 into its tube the dorsal lamellae are folded inward and slightly 

 overlap, and the inner process is pressed flat. 



The branchise are from 12-35 on each side and arise from 

 a firm tissue which is continuous in each semicircle, and 

 apparently formed by the fusion of the bases of the brancliire, 

 the individual elements being marked by a reddish-brown 

 pigment-speck — linear in outline and interfilamentous in 

 ])osition. From each semicircle the finel}'^ coloured organs 

 extend freely distally. The chordoid axis in each is more 

 finely divided than in Chone iufundibuUformis, The pinnae, 

 which are in a double row, become shorter at the tip 

 and somewhat suddenly cease at the base of the short 

 terminal process. Along the outer edge of each filament a 

 series of clavate processes (about 18) are attached in pairs, 

 and a pigment-spot occurs on each side just beyond the 

 attachment of the processes, which in life are often curved 

 downward. Sars calculated that there were from 1200 to 

 l^OO eyes in this species, for each eye-speck is compound. 

 As a transparent object the branchial filament shows the 

 chordoid axis with its coating of hypoderm and cuticle, and 

 the pinnae with jointed chordoid axes (De St. Joseph calls 

 them cartilaginous). In some from Guernsey the branchise 

 were of a pale greenish hue, whilst the pinnae Avere pale or 

 whitish and the tentacles greenish. Zetlandic examples, 

 again, had the l)ranchiae tinted dull orange with a tinge of 

 green, whilst on each filament the pinnee and the dorsal pro- 

 cesses were marked with white grains. Others from St. Peter 

 Port, Guernsey, had dull purplish-red branchiae spotted with 

 white. Four of the dorsal crenated })rocesses also were 

 white. In those from St. Andrews the branchiae are often 

 brownish purjile, and the two tentacular groups are streaked 

 longitudinally with white and purplish brown. The beautiful 

 shades of white and purplish brown and the elegant form of 

 these complicated organs almost baffle description. The 

 general effect of the branchial coloration is striking, fiu' 

 three reddish-brown belts cross the branchiae, the most 



