TI'NICATA. 1!) 



Tliis LcptocUnuDi is of a gloaming wliitc colour, ami is hard and luittle, and much 

 more densely crowded with calcareous spicules than in the cnse of the jireccdiug species. 

 The spicules are especially abundant in tiie superficial layer of the test, making it white 

 ami opa(jue. In the deeper layer alongside tlie viscera of the ascidiozooids there is .i 

 certain amount of yellow pigment in the test. 



These are probaltly young colonies ; ami although they tlo not seem to agree in 

 character with any of the described Antarctic species of the genus, still the material 

 does not seem sufficient for a satisfactory description of a new species. I therefore 

 prefer merely to record that there is this second species of wliite Li'ptocUmim present 

 in the neighbourhood of JNIcMurdo Bay. 



roLYCldNID.K. 



Amaroucii'.m axtarctrtm. 



(Plate VI., figs. 8-13.) 



A .single dub-.shaped colony (Plate VI., fig. 8) was obtained from " Dredge ofl' 

 f'oulraan Island — 13. i. 02 — 100 fathoms." It measures 5x3 cm. in extreme breadth 

 at the upper swollen part of the stalk, but the upper surface (jf the head, where the 

 a.scidiozooids are placed, measures 2 cm. in diameter. The figure is from a photograph 

 representing the colony about one-fifth larger than the natural size. Tlie sliape is not 

 unlike that of the European Amaroucium proUfenim or A. nrgus. 



There is a little sand imbedded in the outer layers of the test (see figs. 9 ami 10) : 

 not sufficient to give the surface a sandy appearance, as in the case of species of 

 P.'<i(i)imapli(Uiiin, but just enough to make it gritty to the knife or needle. The large 

 ascidiozooids are seen in situ in fig. 10, and fig. 11 shows one of them extricated from 

 the tough test. 



There are many rows of stigmata (fig. U), and their arrangement and character 

 arc seen from the enlarged fragment of the l)rauchial sac (fig. 13). 



THALIACEA. 



SAMMD.K 



There arc two jars of Plankton, largely composed of Salpid;c, in the collection, 

 in addition to a number of tubes containing specimens o{ Salpa and Oikupleura that 

 had been caught indivirlually or picked out. Most of this Planktcm material was 

 obtained in far Southern, but not striclly Anfarctic seas (such as 40" to 45° S. Lat.), 

 and it includes oidy well-known cosmopolitan forms. Still, as it is a part of the 

 'Discovery' Collection, these specimens and localities will be given with the rest in (he 

 followinjr list. 



