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TA KU KOMM : 



of the aboral body surface. The condition of the polar plates as well 

 as of the crest-like prominences on either side of them seems to be 

 precisely the same as in C. veneris. The comb-plates are very numer- 

 ous and closely set; their number in a subtentacular rib is 12-14 111 

 the larger individuals and 8 or less in the smaller. The pharynx in 

 large individuals is about six times and in smaller ones about three 

 times as long as the infundibular canal. The arrangement of gastro- 

 vascular canals are perfectly similar to the condition described from C. 

 veneris. Primary tentacles are absent. 



Colour. — The tentacle sheath and the area adjoining it are gener- 

 ally tinged with amber-yellow. Frequently a line of the same colour 

 runs along the subtentacular meridional canals.. More rarely, the lateral 

 extremities of body show each a patch of the same colour. The 

 surface of the body, especially near the lateral extremities, is besprinkled 

 with minute dots of a light-bluish CDlour which displays iridescence. 

 In large individuals, the subpharyngeal meridional canals are faintly 

 brick-red, and the areas between the branches of pharyngeal canal 

 and the basal edge of body are of a bright vermilion colour. 



Specimens examined. — Eight (length 15-50 cm.) from Misaki, Dec. 28, 

 191 7 ; one (length about 60cm.) from the same locality, April 1, 1918. 



Remark. — As stated above and also remarked by BlGELOW (1912, 

 p. 396), scarcely any structural difference seems to exist between C. 

 amphitrites and C. veneris. As the only noticeable point of difference 

 between them, it was pointed out by the author just mentioned (p. 

 397), that the oral margin of the band-like body is about as broad as 

 the aboral margin in the former, instead of being very much narrower 

 as in the latter. But in all the individuals of C. amphitrites examined 

 by me, I found the aboral margin to be considerably broader than the 

 oral margin, precisely as is the case with C . veneris. It may not be 

 superfluous to note that the number of comb-plates representing a sub- 

 tentacular rib is somewhat larger than that usually given for C. veneris 

 While both CHUN (1880, p. 83, PI. xiii, figs. 4, 8) and MAYER (1912, 



