300 



MR. CYRIL CROSSLAND ON THE 



[Feb. 16, 



Compare also the shaded and outline figures of heads of E, afra 

 in PI. XX. figs. 1 & 3. 



Text-fiff. 48. 



%3. 



Outlines of the heads of two specimens of -E. cocc'mea. 



a. Of tlie hn-gest specimen, from Fadiftbhi, Mahlives. 



b. A large, hut not extreme specimen from Hulule, Male Atoll. 



The tentacles are always ringed more or less distinctly distally 

 and sometimes for their whole length. 



The uppei- jaw-plates exactly i-esemble those of E. afra both in 

 their shape and in the nuinbei'S of the teeth they bear, as shown 

 e. g. by the formula 5 — 4 : 6 + 4 — 9. The end-plates of the lower 

 jaws are, however, characteristically difierent, even on a first 

 inspection, beiiig black and nearly round. When magnified they 

 show the peculiar markings given by PI. XX. fig. 7. In some cases 

 a ceitain amount of white calcareous matter is develojjed hei-e, in 

 othei's none at all, but in no case is a lai-ge calcareous end-plate 

 formed as in E. afra (text-fig. 49, p. 301). The double line at 

 the anterior border of the end-plates (marked calc. and chit.) give 

 the maximum development of calcareous matter. See also PI. XX. 

 fig. 7, which represents the ends of the lower jaws of a younger 

 specimen and sliows the characteristic concentric brown bands. 



As mentioned above, the parapodia are proportionately small 

 even anterioi-ly, while shortly after the end of the gill-region 

 (which extends over the anterior fifth of the body, or thereabouts) 

 they are so reduced as to project scai'cely at all (see PI. XX. fig. 6 

 and text-fig. 50 (p. 301)). 



At the same time the dorsal ciiTi, Avhich are long and thick 

 anteriorly, become mere slender little points. The ventral cirrus, 

 Avhich though short and thick is finger-shaped in the first thi'ee 

 or four feet, becomes the usual secretory pad through the 

 bi-anchiferous region, at the end of which it becomes cirriform 

 again, though only about half the size of the small dorsal cirrus. 

 Compare the 33rcl and 50th feet in text-fig. 50 (p. 301). 



In the smaller African specimens the gills begin at the 6th foot 

 in all but one specimen, where the fii'St is on the 5th. In the 

 large examples from the Maldives and Seychelles the 9th foot is 

 more usually the first braiachifei'ous. The number of full-sized 



