Balauoglossus caruosns und numeensis. 427 



Spengel, J. W. (1907), Die Enteropneusten der Siboga, in: Siboga-Exp., 

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— (1909), Pelagisches Vorkommen der Enteropneusten, in: Zool. Aiiz., 



Vol. 34, p. 54—59. 



StiaSNT, G. (1910), Zur Kenntnis der Lebensweise von Balanoglossus 

 clavigerus Delle Chiaje , in: Zool. Anz., Vol. 35, p. 561 — 565. 



Tatteesall, W. M. (1905), Enteropneusta from the West-Coast of Ire- 

 land, in: Eep. Sea Inland Fish. Ireland 1902 und 1903, p. 210—214. 



— (1905), On a new species of Dolichoglossus, in: Rep. 74. Mus. Brit. 



Assoc. Adv. Sc, p. 603 — 604. 



Willey, Arthuk (1893), Studies on the Protochordata, in: Quart. Journ 

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— (1894), Amphioxus and the ancestry of Vertebrates, in: Columb. Univ. 



biol. Ser., Vol. 2, 1894. 



— (1898a), On Ptychodera flava, in: Quart. Journ. microsc. Sc. (N. S.), 



Vol. 40, p. 165 — 183. 



— (1898b), Spengelia, a new genus of Enteropneusta, ibid.. Vol. 40, 



p. 623—630. 



— (1899), Remark on some recent work on the Protochordata, with a 



condensed account of some fresh observations on the Enteropneusta, 

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— (1899), Some points in the morphology of the Enteropneusta, in: Proc. 



Cambridge phil. Sc, Vol. 10, p. 37. 



— (1899), Zoological Results, based on material from New Britain, 



New Gruinea , Loyalty Islands and elsewhere. Part III. Entero- 

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