THE TANAIDACEA 195 



The two families into which the order is divided are dis- 

 tinguished by many important characters, and it may prove 

 necessary in the future to rank them as sub-orders. 



ORDER Tanaidacea, Hansen (1895). 



Family APSEUDIDAE. Apseudes, Leach ; Sphyrapus, Norman and 

 Stebbing. Family TAXAIDAE. Tanais, Audouin and Milne-Edwards ; 

 HeterotanaiSj G. O. Sars ; Leptochelia, Dana. 



LITERATURE. 



1. Boas, J. E. V. Kleinere carciuologische Mittheilungen : 1, Eine neue Art 



derGattung Apseudes. Zool. Jahrb. ii. pp. 109-116, 1886. 



2. Glaus, C. Ueber Apseudes Latreillci, Edw., nnd die Tanaiden. Arb. zool. 



Inst. Wieu, v. pp. 319-332, 2 pis., 1884 ; op. cit. vii. pp. 139-220, 7 pis., 

 1887. 



3. Dohrn, A. Untersuchungen iiber Bau nod Entwicklung der Arthropoden : 



7. Zur Kenutniss vom Bau uud der Entwicklung von Tanais. Jenaisclie 

 Zeitschr. v. pp. 293-306, pis. xi. and xii., 1870. 



4. Sars, G. 0. Revision af Gruppen Isopoda chelifera, rued charakteristik of 



nye herhen horende Arter og Slaegter. Arch. Math. Naturvid. vii. 

 pp. 1-54, 1882. 



5. Nye Bidrag til Kundskaben oin Middelhavets Invertebratfauna : III. 



Middelhavets Saxisopoder (Isopoda chelifera). Arch. Math. Naturvid. 

 xi. pp. 263-368, 15 pis., 1886. 



6. Smith, G. High and Low Dimorphism ; with an account of certain 



Tanaidae of the Bay of Naples. Mitth. zool. Stat. Neapel, xvii. pp. 

 312-340, pis. xx.-xxi., 1905. 



Many of the works quoted in the list at the end of the next chapter deal, in 

 part, with the Tanaidacea. See especially those of Beddard, Delage, Hansen 

 (Plankton Expedition), Norman and Stebbiug, Richardson, Sars, and Spence 

 Bate and Westwood. 



