6 MOLLUSCA. 
Body long, very slender, somewhat widening backwards, of a pale 
yellowish colour, tinted green, and with two stripes of deeper green 
along the back, everywhere dotted with opaque white ; cervical tenta- 
cles very long, slate-coloured, and somewhat annulate; oral tentacles 
about the usual proportionate length, furnished at base with a short 
triangular process like a spur. Back rounded, and provided with 
numerous pores from which the mucus is abundantly secreted. Lo- 
comotive disc narrower than the mantle, and projecting behind it, 
transversely wrinkled, the edge pea-green. 
Length, when extended, about seven inches. 
Found by Mr. Couthouy on an orange tree, near a mountain torrent, 
in the vicinity of Tijuca, near Rio Janeiro. Dr. Pickering also found 
the same species at the same locality. [J. P. c.] 
Mr. Couthouy remarks that the motions of the animal were very 
quick, gliding along more rapidly than he had ever seen any of its 
congeners. It often reared up two-thirds of its long body nearly per- 
pendicularly, and remained so for some time, turning its head in every 
direction, sometimes arching it over like a swan’s neck, and again 
stretching it up so as to call to mind the giraffe, thus giving the snail 
quite an intelligent though somewhat laughable aspect. 
I have regarded this as the V. Taunazsi, of which our descriptions 
are very imperfect, but still definite enough to show that its colours 
are variable; and our species seems to differ from the description 
given of it in this respect only. At any rate, its characters are so 
definitely given, as well as some of its habits, that it seems proper to 
present the observations and figures herewith given. Should it be 
found entitled to a distinct appellation, I would propose for it that of 
V. superbus. 
Figure 5, the animal extended; 5 a, the head; 5 4, portion of the 
foot. 
VITRINA RUIVENSIS (Couthouy, M.S.) (Gould). 
Testa hahotiformis, transverse subquadrata, depressa, papyracea, pellu- 
cida, nitida, chlorata, gradibus etatis striata: spira vix conspicua, 
