652 SIR c. ELIOT ON NjJDiBRANCHS [June 19, 



of the branchial opening are also variable. In one specimen it is 

 nearly closed ; in another it is almost stellate. But in its natural 

 condition it seems to be broad and circular. The foot is broad, 

 grooved, and notched in front. The oral tentacles are long, 

 digitate, and pointed. The most distinct external character is 

 that the back is studded with small tubercles of varying size and 

 of a lighter tint than the ground-colour. The peculiar effect 

 which this produces in the appearance of the animal is well 

 rendered in Alder and Hancock's plate. The tubercles are of 

 somewhat irregular outline, and often have a long pointed tip. 

 Though they are numerous, they are separated from one another 

 by distinct intervals. 



Though the tissues of the buccal organs are decayed, the hard 

 parts are still recognisable. The labial armature is formed of 

 longish, bent, transversely striated rods. The teeth are yellowish, 

 hamate, moderately stout, and of a somewhat wavy outline. They 

 are very like Bergh's plates in the ' Siboga ' Expedition [l. c. 

 pi. xiv. fig. 4). The genitalia are decayed, but no armature was 

 found. 



Bergh, in describing various specimens of his Discodoris con- 

 cinyiiformis, has indicated its probable identity with this species. 

 There is no divergence in the buccal parts ; but it is curious that 

 Bergh, while describing D. concinniformis as bearing light- 

 coloured spots, does not state definitely that the tubercles are 

 lio-hter than the dorsal surface, which is the cause of the peculiar 

 coloration of D. concinna. 



Discodoris pragilis (A. & H.). 

 (A. & H. 1. c. pp. 118-119.) 



The remains of two specimens are preserved, but in so frag- 

 mentary a condition (the result probably of self-mutilation, not of 

 dissection) that nothing can be profitably described except the 

 dorsal surface. No buccal parts were found. 



The ribbon-like strips, of which the remains mostly consist, are 

 soft and slimy, but rather stiffer on the upper surface. This is 

 covered with round, blunt, white tubercles, contrasting with the 

 ground-colour, which is brown of different shades. The general 

 appearance, however, is not like Disc, concinna. Towards the 

 mantle-edge the tubercles become harder, and the edge itself seems 

 to be marked in places by a continuous calcareous deposit. The 

 integu.ments are not visibly spiculous, though they contain 

 numerous spicula. These are as described by Alder and Hancock : 

 small rods of rather irregular outline, often bent in the middle 

 and with blunt or broad extremities. 



Staurodoris rusticata ? (A. & H.). 



(A. & H. 1. c. p. 120.) 



Four smallish specimens labelled " Madras from Sir W. Elliot " 

 are probably Doris rusticata A. & H., though ihere is no name 



