NOTARCHUS. 145 
tervals over the whole integument of the body. Smaller simple 
filaments are sparsely scattered among the tufts, and a fringe of 
short processes borders the rather broad sole on each side. Mouth 
longitudinal with wide wrinkled lips. Labial processes well de- 
veloped. Color greenish-gray. 
Egyptian coast of Red Sea (Savigny) ; Natal (Krauss). 
2 a aE Savieny, Descript. de ’ Egypte, Gasterop., pl. II, 
f. 2.— Bursatella savignana AUDOUIN, Explic.somm. des planches de 
moll. de Egypte, p. 16.—Ap/ysia savignana Fér., Rana, Hist. Nat. 
Aplys., p.69.—A. (Aclésie) savignana Fér., Rana, pl. 20.—Notarchus 
(?) savignyanus Aud., IsseL, Mal. Mar Rosso, p. 165.—Aplysia 
(Notarchus) savignana Fér., Krauss, Die Stidafrik. Moll., p. 72. 
Natal specimens observed by Krauss are more thickly covered 
with processes and have longer tentacles. Specimens preserved in 
alcohol are brownish-black, very soft, elongated, swollen in the mid- 
dle, slender and truncate in front, ending in a point behind. The 
foot is pretty wide, smooth, and above, like the rest of the upper sur- 
face, beset with long, soft, frequently divided threads, and here and 
again with appendages band-like at base, tattered above. The dor- 
sal orifice lies more anterior than posterior, is long-oval, open, and 
about one-fourth the length of the animal, the margin a little re- 
flexed. The anterior tentacles stand laterally and close behind the 
mouth, and each filamentiferous tentacle has a simple tapering pro- 
cess of half the size before, and united with it only at the base, so 
that it looks as if the anterior pair consisted of four tentacles. The 
posterior tentacles stand upon the neck, are shorter than the ante- 
rior, and filament-bearing. 
N. vacinratus Ritippell & Leuckart. PI. 41, figs. 20, 21, 22. 
Length 4-5 inches; in alcohol, about 2 inches. Tentacles slit and 
ragged. Similarly ragged are about a score of the processes of the 
back; among these are simple string-like short compressed filaments. 
The two labial processes are simple, broad and attenuated forwardly 
(fig. 20). Mouth longitudinal, with the lips on each side finely 
wrinkled (fig. 20). Genital orifices and furrow as usual. Gill 
transversely placed, mainly free. To the left and forward in gill 
cavity an elevation caused by the opaline gland is seen, but no 
opening could be found. It emits a violet liquor. Anus surrounded 
by a ring of several (9) small papille (fig. 22). Gill slit about 1 
inch long, capable of being entirely closed. Eyes not noticeable. 
1U 
