339 
pare with Fig. 27.c, representing such body from C. leonina). Further, 
no other sort of plates occurs in the skin of the New Zealand species, 
a conspicuous difference from C. leonina, \n which latter species plates, 
not drawn out into a serrate point (buttons), occur in considerable 
number, among those of the above mentioned form. The calcareous 
Fig. 27. Calcareous deposits from the skin (a) and the introvert (b) of 
Cucumaria leoninoides; from the skin (c) and the introvert (d) of C. 
leonina; radial (left) and interradial (right) of calcareous ring of C. 
leonina (e); cups of '^Ocnus vicarius” (f). e. ; f. ^so/i 
bodies of the thin-walled “introvert” are nearly smooth plates, not 
serrated in one end; in leonina these plates are a sort of rudi- 
mentary tables, as stated by Ludwig. This is, again, a conspicuous 
difference between the two species (Figs. 27.b and d). 
Finally, the large, smooth plates found in the deeper layer of 
the skin in C. leonina appear to be wholly wanting in the New 
Zealand species. 
In the interior anatomy there is an important difference in the 
number of the Polian vesicles, there being constantly two in the 
New Zealand species, 3—4 in leonina. It is a curious faet that 
the oesophagus is often protruded through the mouth on preserv- 
ation, looking like a long proboscis. — On opening specimens of 
leoninoides reddish-yellow oil drops are seen to flow out; the in- 
testine and genital organs are orange-coloured, as is the whole 
inside of the body, on account of the thick, yellowish peritoneal 
layer which covers it all. This gives a striking impression of the 
specimens being very fat. 
22* 
