BY C. IIEDLEY. 



165 



considerable length. Subsequently Keferstein discovered the miss- 

 ing rachidian in another specimen (I.e., p, 448, pi. 84, fig. 6.) 



Professor Dr. Bergh contributed much to our knowledge of 

 this subject in a paper published in i 870, in the Verhandlungen 

 •der Zoologischbotanischen Gesellschaft in Wien, vol. xx., pp- 

 843-854.' 1 have to thank the Professor for his kindness in for- 

 warding to me his last duplicate copy of this essay. A single 

 specimen collected by the Novafa Expedition from the Hunter 

 River, with a description and drawing by Herr Von Franeufeld of 

 the living animal, was submitted to him. A critical examination 

 of these enabled him to correct many errors and omissions in the 

 accounts published by Keferstein. 



There are several more recent scattered notices which I have 

 been unable to consult.* 



These three Triboniophori are now considered to be founded on a 

 single species. The European naturalists were under the great disad- 

 vantage of studying specimens which a prolonged saturation in 

 spirits had shrivelled and altered Comparing their descriptions 

 with the slug so abundant round Lrisbane, and which 1 assume to 

 be Aneitea graeffei, I notice that only in kreffti is mention made of 

 the red edge of the foot and of the shield or mantle. All specimens 

 kept in strong spirits for a week or two lo>e this colour ; so unless 

 it had been carefully noted down by the collector, the European 

 author would have been ignorant that it had ever existed. Again, 

 the description of " small round warts " gives a false idea of the 

 animal whose skin might indeed thus shrink in spirits, but which 

 in life and motion is nearly smooth. 



The members of the Janellida?, which we have enumerated, 

 fall into two vcy distinct sections : the one inhabiting Xew Zea- 

 land and the Admiralty Archipelago ; the other embracing the 

 Australian species, the one from Aneiteum, and the one from New 

 Caledonia. The first group is known as Janella or Athoraco- 

 pliorus ; the other, Aneitea or Triboniophoius, which Tryon, in his 

 4< Structural and Systematic Conchology," reduces to Athoraco- 

 phorus, lias been repea te lly distinguished by good observers. Yet 



icr i*o n Hevl i e "! iU1 jHhrbuch fler deutschen malakozoolo^ischen Gesellschaft. Vol. i, pp 

 i»5-ia3, and xn, p. 236. Ti.ppartme-Canelri Malacolo;,'ia viaggio Magenta, p. 100. 



