BRAOHIOPODA. 895 
dium reduced to two lateral expanded processes arising from the 
elevated anterior portion of the septum and representing the 
ascending process. 
Fias. 627-630. Kraussina rubra, Pallas (sp.). (DAvipson.) 
Type, Kraussina rubra, Pallas (sp.). 
Distribution. Recent (South African and Australo-Zealandian 
Provinces). 
Mannia, Dewalque. 1874. 
Small magadiform shells, with the brachidium consisting of 
two descending processes, not uniting with the median septum, 
the latter bearing at its extremity two disunited lamellae which 
represent the ascending branches. 
Type, Mannia Nysti, Dewalque. 
Distribution. Miocene. 
Platidia, Costa. 1852. 
Shells small, biconvex, smooth, with large punctures. Foramen 
large, encroaching on both valves; no deltidial plates. Teeth 
and sockets small. In the brachial valve the median septum 
is reduced to a vertical plate which rises near the center of the 
Fias, 631-633. Platida anomioides, Scacchi. (Davipson.) 
valve. To this plate the descending branches of the loop are 
united; ascending branches not represented; brachia in three 
lobes, the median lobe surrounding the oral orifice and not 
spirally coiled. 
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