
NICHOLLS—COPEPODA FROM SOUTH AUSTRALIA 23 
portions as in pungens. The first antenna has nine distinct segments, with com- 
paratively few setae; the remaining head appendages are much as in the type 
species but the maxilla has only three inner spinules on the claw and the maxilliped 
is somewhat bent instead of having straight sides. The legs are like those of 
pungens with the following seta formula: 
endopod. exopod. 
p-l. 1,2.321. 11,323. 
p.2. 1.2.321. 1.1.423. 
p.3. 1.2.321. 1.1.423. 
p.4. 1.2.221. 1.1.423. 
The fifth legs are about twice as long as wide with two terminal and one inner 
setae. The caudal rami are stoutly built and less than twice as long as wide. The 
male is unknown. 

Fig. 9. Myzopontius australis sp. nov. Female X 67; urosome and appendages X 200. 
Famity DYSPONTIIDAE Sars. 
Sars, 1915, p. 117. 
A key to the genera of this family is given below in which certain genera not 
referred to by Sars (loc. cit.) but identifiable as belonging to the family have been 
included. It should perhaps be noted here that Pteropontius has found its way 
into the wrong group in Wilson’s (1923) key to the Cyclopoida. This genus is 
characterized by having both rami of the first legs only 2-segmented. Two of the 
new genera described by Thompson and Scott (1903) are recognizable as belong- 
ing to this family. Metapontius Hansen (1923) also belongs here and Urogonia 
Brady (1910) probably does, though as with so many of the descriptions in this 
paper it is too meagre for certain identification. An interesting form occurred 
in this collection from South Australia, for which a new genus has been required, 
and will be described below. 
