BY MARGUERITE HENRY, 



553 



South Australia. 

 Calanoida. 



Fam. Centropagidae. — Boeckella sp. 

 Cyclopoida. 



Tain. Cyclopidae. — Cyclops australis (King), Pachycylops annulicornis 

 (Koch), Leptocyclops speratus Lilljeborg. 

 Harpacticoida. 



Fam. Canthocamptidae. — Attheyella australica Sars, Moraria longiseta 

 Henry. 



Tasmaiiia. 

 Calanoida. 



Fam. Centropagidae. — Boeckella robusta Sars, B. rubra Smith, B. insignis 

 Smith, B. longisetosa Smith, Brunella tasmanica Smith. v-^CT* \ C j^^ 



Cyclopoida. /^n^'-'O^Ts^^/^'^ 



Fam. Cyclopidae. — Cyclops albicans Smith, C. dulvertonensis Smith. ' ' . . .. 



Classification. ' , 



The classitieation of the Copepoda is still in an unsatisfactory condition, 

 mainly because many of the parasitic forms have not been thoroughly works^ ,_^ 'tyAS,?'- \\j 

 out. Giesbrecht's scheme of dividing the Eucopepoda into two suborders, Grymno-^^Ji' ^^ \^<h/^ 

 plea and Podoplea, was discarded by Sars in his Crustacea of Norway, as being '^" ' '^ 

 artificial, and in dealing with the Copepoda as a whole, he divided it into seven 

 great divisions, while for the Cyclopoida he revived Thorell's old terms of Gna- 

 thostoma, Siphonostoma and Poeeilostoma. In dealing exclusively with the free- 

 living forms, Giesbrecht's classification is quite a natural one, his suborder 

 Gymnoplea corresponding with the division Calanoida of Sars and his Podoplea 

 comprising the Cj'clopoida and Harpacticoida. The following key is based on 

 Giesbrecht's classification. 



Key to the Eucopepod-a. 



A. Articulation between cephalothorax and abdomen occurring between the 5th 



and 6th segments suborder Gymnoplea 



{= Calanoida Sars.) 

 B. Antennules of male not geniculate. (All marine) Tribe Amphaskandria. 



BB. One antennule geniculate in male Tribe Heterarthrandria. 



AA, Articulation between cephalothorax and abdomen occurring between the 4th 



and 5th free segments suborder Podoplea. 



B. Swimming forms with antennules not geniculate in the male. (Mainly 



parasitic) , Tribe Isokerandria. 



BB. Swimming forms with both antennules geniculate in the male. 



Tribe Ampharthrandria. 

 (= Cyclopoida Sars and Harpacticoida Sars). 



The free-living freshwater forms are all comprised in the three divisions 

 Calanoida, Cyclopoida and Harpacticoida of Sars, so that the following key is 

 sufficient for* identification. 

 A. Articulation between the cephalothorax and abdomen occurring between the 



5th and 6th free segments Calanoida. 



AA. Articulation between the cephalothorax and abdomen occurring between the 

 4th and 5th free segments. 



B. Cephalothorax and abdomen distinctly separated Cyclopoida. 



BB. No distinct separation Harpacticoida. 



