DESCRIPTION OF SPECIES 93 



A. capensis (Millar, 1955). The three descriptions are very similar, as may be seen by the comparison 

 of the diagnostic characters given in Table 29. Details of the 'Discovery' specimens are included. 



It is evident from the table below that both the number of turns of the stigmata, and whether 

 the stigmata are undivided (Text-fig. 30 B) or divided (Text-fig. 30 C) depend on the size of the 

 specimen. The distinctions between A. krausei and A. glaciata therefore break down. As van Name 

 (1945) pointed out A. krausei is to be regarded as a young stage of A. glaciata, because division of the 

 stigmata is likely to occur in older specimens. Having now been able to examine a second specimen 



5.0 mm 



Text-fig. 30. Agnesia glaciata Michaelsen : A, specimen from Patagonian Shelf (St. WS 775); B, stigma of specimen from 

 False Bay, S. Africa (St. 91); C, stigma of specimen from St. WS 775. 



Table 29 



'Discovery' St. WS 775 



of Agnesia from Table Bay, South Africa, I find that this one possesses radial vessels across the 

 stigmata (Text-fig. 30 B, r.v.), and conclude that my earlier observation (Millar, 1955) was incorrect 

 or based on poor material. The distinction between A. capensis and A. glaciata also disappears, and 

 one species, A. glaciata, remains. All specimens of Agnesia in the 'Discovery' collection can be 

 referred to A. glaciata, which appears to be a species of wide distribution in southern waters. 

 Distribution. Subantarctic (Magellan region); South Africa; north of New Zealand. 



