NOTARCHUS. 147 
Like many of the species of the allied genus Aplysia, this animal 
possesses the power of emitting a purple fluid from the edges of the 
mantle, but only in small quantity ; and it may often be handled 
without anything of the kind being observed. 
N. AREOLA Pease. Unfigured. 
Length 2 inches. Elongate, smooth, rounded above, rather com- 
pressed on the sides, and everywhere covered with small branchial 
filaments. Mantle lobes elevated, short, rounded, and a groove ex- 
tending from where they unite anteriorly on the back along the 
right side of the head to the mouth. Dorsal tentacles elongate and 
grooved laterally. Oral tentacles similar, but slightly dilated. 
Hyes a little in advance and slightly lateral to the base of the dor- 
sal tentacles. Branchie large exposed or covered by the lobes of 
the mantle. Siphonal tube posterior and tubular. Foot narrow, 
elongated and projecting far beyond the lobes of the mantle in a 
point. Color cinereous or greenish-ash, densely and minutely 
veined longitudinally, and minutely speckled and clouded with 
white. Remote ocellations with blue centers and brown rings on a 
fawn ground, and scattering simple brown spots. (Pse.). 
Sandwich Is., gregarious among seaweed (Pse.). 
Aclesia areola Psr., P. Z. S., 1860, p. 24. 
N. ractnuLatus Couthouy. PI. 43, figs. 29, 30. 
Length 23 inches. Color pale green, closely covered with black 
dots, which give it a bronze hue, whole body ornamented with little 
green arborescent or frondescent tufts, irregularly disposed, except 
around the upper margin of the foot, where they are smaller and 
form a regular row; viewed in the water, these tufted appendages 
cause the animal to appear as if covered with a delicate moss. The 
mouth is nearly concealed by its thick fleshy lips, which are pro- 
longed on each side into aslender tentaculiform process. Foot 
large and broad, sole yellow, dotted greenish. Twice as long 
as broad, elevated, abruptly sloping behind, the foot trailing in a 
point behind. (Couth.). 
Banter of Rio Janeiro, Brazil. 
Bursatella lacinulata Couthouy MS., Gown, U.S. Expl. Exped. 
Moll., p. 223, pl. 16, figs. 269, 269a.—Notarchus lacinulatus Morcu, 
Malak. Bl. xxii, p. 176.—? Notarchus laciniatus Riipp., Guppy, 
First sketch of a marine invertebrate fauna of the Gulf of Paria and 
its neighborhood, in Proc. Sci. Asso. Trinidad, 1877, ii, p. 187 ; 
