404 SIB C. ELIOT ON NUDIBEANCHS [Mar. 1, 



Since writing the description of this species I have examined 

 another specimen, found at Mombasa at low tide. It is strongly 

 arched, and of a sandy-brown colour with patches of darker brown. 

 Near the branchial opening are a few bands of minute black 

 spots, almost invisible except under a lens. On the dor-sal surface 

 are 22 pits, scattered quite irregularly round the margin and in 

 the middle. The preserved specimen has a small ridge between the 

 rhinophores, not extending before or behind them, and possibly 

 due to contraction after death. Around the branchial pocket 

 is a circular area, marked oflf from the rest of the back by being 

 somewhat flatter and lighter in colour. This feature was not 

 found in any of the other specimens. 



Genus Orodoris. 



This genus, which Bergh regards as allied to Miamira, has the 

 oval shape, wide mantle-margin, and tripinnate branchiae of an 

 ordinary Dorid. The dorsal surface bears ridges and tubercles. 

 The mouth-parts show some affinity to Chromodoris. There is a 

 labial armature composed of bent rods, and the rhachis of the 

 radula presents thickenings. The innermost teeth are denticulate 

 on both sides, the next few on the outer side only, and the i-est 

 are smooth. 



Orodoris miamirana B. 



[Bergh, " Neue Nacktschnecken," Jour. Mus. Godeffroy, Heft 

 viii. 1875, pp. 67-71.] 



One specimen from New Britain, kindly given me by Dr. Willey. 

 It is, as preserved, of a uniform olive-green, with a few white 

 spots on the foot and underside. The length is 58, the breadth 32, 

 and the height 26 mm. The foot does not project beyond the 

 mantle ; it is deeply grooved in front and is broad, measuring 

 15 mm. across without counting the margins, which are turned 

 inwards. The dorsal surface is arched, and the greater part of it 

 is covered with composite tubei-cles. Over the head and round 

 the edge of the mantle are many smallish tubercles roughly 

 arranged in three rows. There is one large tubercle somewhat 

 resembling the terminal lobe of Miamira over the tail, but no 

 corresponding formation at the other end. Down the middle of 

 the back runs a thick ridge, in which is set the large branchial 

 opening. It bears six tubercles, one rather small one between 

 the rhinophores, then two more small ones, followed by two large 

 ones ; then comes the branchial pocket, and behind it is another 

 large tubercle. From this central ridge three transverse ridges, 

 also composed of compound tubercles, run to the sides. The 

 branchial pocket has a raised rim roughly circular but wavy in 

 outline. Bergh gives the branchiae as 7 ; in this specimen there 

 are three on each side, an open space behind, and in fi^ont a very 

 broad plume with a small accessory plume at its side. The anal 



