HI "TEKUA NOVA" EXPEDTTTON. 



ProxtunKi mi/I nicntiiin (Joubin). 

 Linen* rurrHj/iitux, M'Int. 



(/>) From New Zealand : 



Baseodiscus giardii (Hubr.). 



The two forms described as new are : 



Baseodiscus ////fni'rfiri/x, sp. n.. and 



Jjilll'IlN Nl-l>tti, SJJ. 11., 



both from the Antarctic regions. 



The three doubtful forms are : 

 (<i) From the Antarctic regions : 



A very small specimen, apparently belonging to the genus Cerebratulus, 

 and probably very young. 



(//) From New Zealand : 



Two species probably belonging to the genus I/men*, each represented 

 by one specimen only. They are referred to in the sequel as 

 Liiii'ttx, spp. " A ' and " B." 



The material on the whole is very well preserved, and no difficulty, on the ground 

 of preservation, has beeii experienced in making out microscopic details by means of 

 sections or otherwise. On the other hand, the number of specimens in some cases is 

 so small that it was thought undesirable to dissect them to any great extent, and the 

 accounts Lnven of their structure must be regarded as subject to modification at some 

 future time, when more abundant material may be available. 



It is a matter for regret that almost no record appears to have been kept of the 

 colours and markings of the various species during life. The specimens, by the time 

 that they were handed over to me for study, were all, with a very few exceptions 

 which will be mentioned in their appropriate places, deprived of all traces of their 

 natural colours by the spirit in which they had been stored. 



Transverse sections taken by hand were employed as a means of assigning many 

 of the specimens to their position. This method was found extremely valuable for 

 rapidly sorting individuals which were so contracted, or of such nondescript external 

 appearance, as to be inseparable by mere inspection. The sections were lightly stained 

 with Paracarmiue or Picrocarmine, and rapidly differentiated, dehydrated, cleared 

 (preferably in Xylol) and mounted in Balsam. lu the cases where serial sections were 

 made, the best results were obtained by staining on the slide with Hsemalum, or 

 with Delafield's Haematoxylin followed bv Kosin. 



was found useful in clearing some preparations, such as the proboscis of 



