ROTATORIA 



165 



relative length of the anterior setae our Togoni Tso specimens may be considered as typical 

 longiscta, while our other specimens are transitional to f. lUnnctica (Zacharias) : 



Length 

 F Hi Ilia longisela 



ToGOM Tso 230 



ToGOM Tso 240 



WuLAR Lake 138 



WuLAR Lake 133 



WuLAR Lake 146 



WuLAR Lake 142 



L. AIanasbal 150 



L. Manasbal 150 



OOTACAMUND 171 



OOTACAMUND 208 



Filinia tcrininalis 



OoTACAMUND 138 



OoTACAMUND 138 



OoTACAMUND 142 



3. KcratcUa qiiadrata (MuUerj and Kcmtclla vdga (Ehrenberg). In spite of the 

 valuable contributions of Hartmann (1918) anil others, there still appears to be considerable 

 uncertainty as to the status and correct designation of the various forms included by Harring 

 (1913) under K. qiiadrata (Miiller). After examining extensive material from South 

 Africa and India we are fully convinced of the correctness of the contention that two species, 

 A', qiiadrata (=aculeata Ehrenb.) and K. valga, are to l)e recognised. Moreover, the 

 nomenclature of these two species in their typical forms raises no difficulties. 



Amiraca aculeata Ehrenberg (1832) is expressly stated by its describer (1838) to be 

 identical with Brachionus quadratus Miiller. Ehrenberg's best figure (1838, T. LXII, 

 fig. xiv, 1) may therefore be taken in conjunction with those of Miiller (1786, T. XLIX, 

 figs. 12, 13) as defining the typical form of qiiadrata. The posterior margin of the lorica 

 in Ehrenl>erg's figure, measured across the outer margins of the bases of the posterior 

 spines, is wider than the anterior margin similarly measured across the bases of the antero- 

 lateral spines. The posterior spines are parallel (Miiller) or very slightly divergent, al)out 

 two-fifths as long (Ehrenberg) or half as long (Miiller) as the lorica. Both reticular and 

 punctate sculpture are clearly indicated by Ehrenberg. Miiller's figure is so unsatisfactory 

 that in fixing the typical form it is best to abide by the excellent illustration given by 

 Ehrenberg, save that it is convenient to regard typical qiiadrata as having practically parallel 

 posterior spines, as is indicated by Miiller. 



