mil. 



Stuflies on marino Oslrauods 331 



Genus Monopia C. Claus. 



Monopia, C. Clais, 1873. Eumonopia, C. Cr.Als, 1891 b. Cypridina (part.), G- S. BRADY, 

 1865, 1897 and 1902a; G. W. MCllkr, 1906b and 1912. Cypriclinodes (part.), G. S. Brady 1902a. 



Remarks: — This genus comprises according to niv opinion (cf. above jip. 193) two N umber of 



fnih-^eifrn. 



sub-genera: 



Monopia V. Ci.Al^ 

 Cypriclinodes (J. S. BliADY. 



It may probably not be convenient to work out a diagnosis of this genius before a detailed ' 'iia?no^i-^ "/ '/«■ 

 re-examination of C. Claus' Monopia jlaveola — the only representative hitherto known of one 

 of the two sub-genera mentioned — has been carried out. I have, consequently, confined myself 

 in this treatise to an elaboration of a descrijjtion of Cypridinodes, the only one of these two 

 sub-genera of which T have had material myself. A consequence of this is that several of the 

 cliaracters in this description are of generic and not of sub-generic value. 



Sub-genus Cypridinodes G. S. Brady. 



Cypridina (part.), G. S. Bi?ady, 186;-) and 1897; (J. W. Mt'l-LKR. 1906 h and 1912. 

 Cypridinodes, G. S. Brady, 1902 a. 



Description: — Shell: — The shape is somewhat oval with a well-developed posterior 

 corner. The rostral incisur is rather deep and narrow (G. S. Brady's figure of C. favus, 1902 a, 

 pi. XXII, fig. 20, is in tliis respect, as in several others, quite incorrect, a fact that I verified 

 when re-examining the type specimen). Near the inner margin of the incisur there are two 

 medial bristles situated close to each other. Posteriorly the list runs in an unbroken line straight 

 across the posterior part of the shell (I have not succeeded in finding the place where it passes 

 into the list along the ventral margin of the shell). With very strong calcification. The forms 

 hitherto known are comparatively large. 



First a n t e n n a: — This is long, slender and has eight joints. The sensory bristle 

 of the fifth joint has thirteen sensory filaments. Bristle b and c in the males are modified in 

 the way described for the sub-genus Doloria. The distal bristles are not much longer in the 

 males than in the females. 



Second antenna: — The p r o t o p o d i t e has a medial-distal bristle. E x o- 

 ]) o d i t e : The bristle of the second joint is powerfully developed. The natatory bristles on 

 the fhird to the ninth joints are quite without spines. The second to the ninth joints have basal 

 spines. Endopodite: This is similar in males and females and is com])aratively well 

 developed, elongated; the bristle of the end joint is relatively long. 



Mandible: — P r o t o p o d i t e: The endite on the coxale is either simple distally 

 or has only a faint indication of bifurcation; its spines are rather powerful, especially those 



