ELIOT : NUDIBKANCHIATA FEOM CAPE TEED ISLANDS. 139 



many lacunae. It is covered with a remarkably thick layer of the 

 hermaphrodite gland, which is everywhere at least 1 mm. deep, and in 

 some places as much as 3 mm. 



There are two distinct blood-glands, one before and one behind the 

 central nervous system. They are irregularly lobed, but not much 

 indented, and olive green, contrasting markedly with the white organs 

 around them. The central nervous system is yellowish, and enclosed 

 in a strong, white capsule. The ganglia seem to be close to one 

 another, and I was not successful in separating them. Their surface 

 is granulated. The yellowish lens of the eyes is very large, the black 

 part small. 



A prostate is present, but no armature of the reproductive organs 

 was found. The spermatotheca is very large, and coloured brown by 

 its contents. 



This form seems to agree in its principal external and internal 

 features with Discodoris muta, Bergh, recorded from Guadaloupe. 



Biscodoris fragilis (A.. & H.) is another species which has been 

 observed to mutilate itself and throw off portions of the mantle-margin 

 while alive. 



DiscoDOEis sp. PI. XIV, Fig. 3. 



Mr. Crossland's notes on the living animals are as follows : — 



" In a crevice of rock, at low tide level, among surf. Porto Praya. 

 Very flat, stiff, and harsh, but back not in any way warty, papillate, 

 or pitted. To naked eye appears of a uniform orange brown, darker 

 on the visceral mass, lighter round the mantle-edge. Opaque white 

 marks, irregularly scattered round mantle-edge, and larger ones near 

 the middle of the body where mantle joins the visceral mass. Rhino- 

 phores of a darker shade, points directed backwards. Gills 6, tri- 

 pinnate, rather small. Gill-pocket with 6 large teeth, but cannot 

 close completely. Rhinophore-pockets also raised, with large and 

 small teeth irregularly placed. Gills sandy and dark brown, former 

 colour predominating. Under lens, colour seen to be due to a dark- 

 brown network with very small round yellow meshes. 



" Under side shows ample mantle with wavy outline. Foot grooved 

 and notched. Oral tentacles fairly long. All bright yellow, except 

 for small deep brown spots on the inner part of the mantle." 



The larger specimen accords with this description, but the orange 

 brown has become grey. There are some reddish spots on the under 

 side near the junction of the mantle and the body. The shape is 

 very flat, The length 34 mm., the breadth 21-5 mm., and the height 

 5"5. The mantle-edge overhangs the body all round, and in some 

 places is 8 mm. wide. The back is finely granulate ; the integuments 

 stiff, waxy, and brittle. 



The smaller specimen is similar, but has preserved more of the 

 orange colour, and is only half the size. 



The foot is much shorter than the body, being only 18 mm. long in 

 the larger specimen. It is ample in front, but in neither specimen is 

 it clear that there is a groove. The tentacles are rather large and 

 digitate. The branchiae are 6, besides a small detached plume. The 



