350 PROCEEDINGS OF THE MALACOIOGICAL SOCIETY. 



long and flat. The colour is a uniform olive-brown. The lateral ends 

 of the oral veil are large and free. The spines in the integuments are 

 much bent and irregular, but not branched. 



The labial armature with its cuticular blades is as usual in the 

 genus. It is composed of little columns split into three or four 

 denticles at the top, and presents a very rough surface, almost like 

 a radula. The formula of the radula is about 24 xG + l. 0.1+6. 

 Tlie fix'st laterals are large with rather blunt tips and bear 4-5 

 denticles. The second, third, and fourth laterals are erect, and retain 

 the hamate form. The fifth and sixth are plates. The vas deferens 

 is long and bears a transparent armature which is difficult to see, but 

 is apparently composed of disks bearing spines. 



I think that this is probably the A. pilona, var. Novozealandia, of 

 Bergh (Mai. TJnt. in Semper's Ileisen, vi, 2, p. 94, 1905), but doubt 

 if it is really the same species as A. pilosa, though undoubtedly nearly 

 allied. The dorsal papilla) are longer, and there are differences in the 

 rliiuopliore sheaths, labial armature, and radula. 



AoANTnoDOiiis GLOBOSA, Abraham. 



Acanthodoris glohom, Abraham : Proc. Zool. Soc, p. 262, pi. xxx, 

 figs. 5-9, 1877. 



One of Abraham's specimens examined. The external characters 

 are as described by him, but it looks to me as if the animal had 

 originally been black or bluish. The integuments are very thin, the 

 dorsal tubercles sparsely scattered, and two of the processes on the 

 rhiuophore sheaths are larger than the others. The underside of the 

 mantle is marked with reddish lines formed by spicules. 



The internal organs are not well preserved, but the buccal parts are 

 clear. Contrary to Abraham's statement, the labial armature with the 

 two blades is quite distinct. It is formed of mace-like elements, 

 swollen below the tip, but ending in a point and not denticulate or 

 divided. They are set in unusually regular rows. The formula of 

 the radula is about 34 X 7 + 1 . . 1 + 7. The first lateral is of the 

 usual shape and bears 3-4 denticles. The second to the sixth laterals 

 are all erect, and, though much smaller than the first, retain something 

 of the hamate shape. The seventh is a flat plate. No armature could 

 be found in the genitalia. The vas deferens is long. 



This is possibly identical with A. metuUfera, Bergh (Mai. Unt. in 

 Semper's Ileisen, vi, 2, p. 98, 1905), described from a single specimen 

 obtained in Tasmania, but there are differences of detail in the radula 

 and labial armature. 



NUDIBRAXCIIS FROM THE FALKLAXD ISLANDS. 



The small collection of Nudibranchs here described were all collected 

 by Mr. Valentine, and, it would seem, all in Stanley Harboiir, Falkland 

 Islands. Two of them had been deposited in the Museum of Manchester 

 University and were given me bj' Dr. Hoyle ; for the rest I am indebted 

 to Mr. Valentine himself. 



The species are as follows : — 



