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). 



SAVIGNY, Descript. de 1'Egypte, Gasterop., pi. II, 



f. 2. Bursatella savignana AUDOUIN, Explic. somm. des planches de 

 moll, de 1'Egypte, p. 16. Ap/ysia savignana Fer., RANG, Hist. Nat. 

 Aplys., p. 69. A. (Aclesie) savignana Fer., RANG, pi. 20. Notarchus 

 (/) savignyanus Aud., ISSEL, Mai. Mar Rosso, p. 165. Aplysia 

 (Notarchus') savignana Fer., KRAUSS, Die Siidafrik. 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. LACINIATUS Riippell & 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 papillae (fig. 22). Gill slit about 1 

 inch long, capable of being entirely closed. Eyes not noticeable. 

 10 



