226 



TEIIRA NOVA" EXPEDITION. 



small slit at the liack. In this individual there was nothing to indicate a reconstruction- 

 process of any of the organs. 



B. 



FIG. 8. Spongidbranchaea 

 austniUs (d'Orb.). 



Entire animal, ventral 

 aspect, x 14. 



FIG. 9. Sponyiobmnchafia australis (d'Orb.). A, isolated teeth of radula, x 220 

 B, hook-sacs, x 220. 



The specimens to which a query is affixed are very small and measure about 3 mm. 

 in total length, and, as will lie seen in tig. 8, larval rings are present, and the entire 

 body is thickly strewn with dark chromatophores. The posterior gill is represented by 

 four folds of skin, but the fringes are not formed, and the only indication of the lateral 

 gill consists of a cluster of cells in the integument. The gouad is brown and is enclosed 

 in a transparent visceral envelope, which latter is dotted over with many dark spots, as 

 is also the lining of the buccal cavity. The chromatophores and the presence of large 

 cone-like tentacles give these specimens a resemblance to Clione punctuta, Tesch, a 

 species of Indo-Australian waters known as yet solely by its external appearance. 

 C. punctata has, however, a more pointed end to the body, and the radula, fig. 9, A, 

 and hook-sacs, fig. 9, B, seem to agree very closely with those of S. australis. The 

 arrangement of the jaw-spines is also similar. Many gullet-bladders were observed in 

 both specimens. 



Distribution. Antarctic regions to about 50 B. in the Pacific, in the Indian 

 Ocean to 41 S., and in the Atlantic to 36 S. (Meisenheimer, 1905). 



