46 G. o. sars. [No. 8. 



rami small. sublinear. claws slender, sul xm [iial, seta of dorsal eu> 

 attached nearly in the middle. Propagation sexual. Prehensil 

 palps of 2nd pair of maxillae in male rather slender and exactly 

 alike on both maxilla?. Copulative organs not very large, outer 



dilatory tubes with numerous whorls of spines, coronula pro- 

 duced, cupuliform. 



Remarks. - This is another new genus recently established by 

 Messrs. Brady & Norman to receive the rather anomalous Euro- 

 pean form. Ci/pris <j\hha, IJamdohr, with which the Australian spe- 

 cies described below is undoubtedly congeneric. Another nor- 

 thern species, which I have identified with C. hipliraln. Koch, 

 also belongs to this genus. Moreover, I have succeeded last 

 year in raising from dried Chinese mud 2 other species of the 

 same genus both distinguished by the peculiar spiny armature "f 

 their shells, somewhat, reminding us of certain species ot the 

 marine genus CytUreis. As seen from the above given diagnosis, 

 the generic characters are very well marked, both as to the shell 

 and the soft parts, and even before knowing t he work of Messrs. 

 Brady & Norman 1 had set up the genus, naming it, curiously 



6. Ilyocypris australiensis, n. sp. 



(PL II, fitrg 5_ 8; pi. vi). 



Specific Characters. - Shell of female, seen laterally, oblc 

 quadrangular or subreniform, the greatest height considerabl 

 front of the middle and rather exceeding the half length; 

 terior extremity broadly rounded, posterior subtruncate, d 

 margin nearly straight, ventral deeply sinuated: seen from a 

 oblong, greatest width behind the middle and about equallir 

 of the length, anterior extremity tapered and acuminate, post 

 obtuse. Shell of male somewhat narrower with the auterioi 



