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 TANAIDAE. Tanais, Audouin and Milne-Edwards ; 

 Heterotanais, G. 0. Sars ; Leptochelia, Dana. 



LITERATURE. 



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



der Gattung Apseudes. Zool. Jahrb. ii. pp. 109-116, 1886. 



2. Glaus, C. Ueber Apseudes Latreillei, Edw., und die Tanaiden. Arb. zool. 



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

 1887. 



3. Dohrn, A. Untersuclumgeii liber Bau und Entwickluug der Arthropoden : 



7. Zur Kenntniss vom Bau und der Entwicklung von Tanais. Jenaische 

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



4. Sars, G. 0. Revision af Gruppen Isopoda chelifera, med cbarakteristik of 



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

 pp. 1-54, 1882. 



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



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

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



6. Hmith, 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 Stebbing, Richardson, Sars, and Spence 

 Bate and Westwood. 



