54 THE CRUSTACEA 



Sub-Order 2. Gtmnomera. 



Carapace not enclosing body and limbs. 



Tribe 1. Onychopoda. Four pairs of trunk -limbs, more or less 

 compressed. 



Family Polyphemidae. Polyphevuis, 0. F. Mliller ; Bythotrephes, 

 Leydig ; Evadne, Loven ; Podon, Lilljeborg. 



Tribe 2. Haplopoda. Six pairs of trunk-limbs, completely pediform. 



Family Leptodoridae. Leptodora, Lilljeborg (Fig. 19). 



IjITERATURE. 



1. Baird, IV. The Natural History of the British Entomostraca. Ray Society, 



London, 1850. 



2. Bernard, H, M. The Apodidae : A Morphological StudJ^ London, 1892. 



3. Clans, C. Zur Kenntiiiss des Baues and der Entwickelung von BrancMpus 



stagnalis nnd Apvs cancriformis. Abhandl. kgl. Ges. Wiss. Gottingen, 

 xviii. ; Phys. CI. pp. 93-140, pis. i.-viii., 1873. 



4. Zur Kenntniss der Organisation und des feineren Baues der Daphnideu 



und verwandter Cladoceren. Zeitschr. wiss. Zool. xxvii. pp. 362-402, 

 pis. XXV. -xxviii., 1876. 



5. Untersuchungen liber die Organisation und Entwickelung von 



BrancMpus und Artemia. Arb. zool. Inst. Wien, vi. pp. 267-370, 12 pis., 

 1886. 



6. Cunnington, W. A. Studien an einer Daphnide, Simocephalus siriia. Jena. 



Zeitschr. xxxvii. pp. 447-r)20, pis. xxiv.-xxvi., 1903. 



7. Ekman, S. Beitriige zur Kenntnis der Phyllopodenfamilie Polyartemiidae. 



Bihang Svenska Yet.-Akad. Handl. xxviii., Afd. iv.. No. 11, 38 pp. 

 4 pis., 1902. 



8. Grobben, C. Die Entwickelungsgeschichte der Moina rcdirostris. Arb. zool. 



Inst. Wien, ii. pp. 203-268, 7 pis., 1879. 

 /9. Lankcstcr, E. Hay. Observations and Rellections on the Ap))endages and on 

 the Nervous System of Ajms cancriformis. Quart. J. Mier. Sci. xxi. 

 pp. 343-376, pi. XX., 1881. 



10. Leydig, F. Naturgeschichte der Daphniden, pp. iv. -1-252, 10 pis. 4to. 



Tiibingen, 1860. 



11. Lilljeborg, W. Cladocera Sueciae. Nova Acta reg. Soc. Sci. Upsala, (3) 



xix. vi-t-701 pp. 87 ]ils., 1900. 



12. Packard, A. S. A Monograph of North American Phyllopod Crustacea. 



Twelfth Ann. Rep. U.S. Geol. Survey, pp. 295-392, 39 pis. and map, 

 1883. 



13. Pclsenecr, P. Observations on the Nervous System of Apus. Quart. J. 



Micr. Sci. xxv. pp. 433-444, pi. xxx., 1885. 



14. Richard, J. Revision des Cladoceres. Ann. Sci. Nat. Zool. (7) xviii. pp. 



279-389, pis. xv.-xvi., 1895 ; and op. cit. (8) ii. pp. 187-363, pis. xx.-xxv., 

 1896. 



15. Sars, G. 0. Norges Ferskvand.skrel)sdyr. Cladocera Ctenopoda. 71 pp. 



4 pis. 4to. Christiania, 1865. 



16. Om en dimorph Udvikling sanit Generationsvexel hos Leptodora. 



Forh. Vidensk. Sclsk. Christiania, 1873, pp. 1-15, 1 pi. 



i 



