MONOGRAPH OF THE EXISTING CMNOIDS. 



139 



In Balanometra of the Zenometrinae and in Ilypnlovwtra (fig. 297, p. 221) 

 of the Perometrinse P, and Pa are absent. In both these genera the arm bases 



PIG. i;04.-LATKKAL V.KW OF ESPEC.AI.LV WELL-DFAELOPBD SPECIMEN OF PTILOMETRA MCI.LERI EnOM SVDNET, 



New South Wales. 



are very closely pressed against each other. In the outer arms arising from IHBr 

 axillaries in CyUometra P, and P„ are absent, as also on the inner arms in 

 Efimctra. Both of these genera belong to the Colobometridse. 



