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PART II. SYSTEMATIC ACCOUNT 



end of the bridle (Fig. 89 Д B). Thus the protosoma is much shorter on the 

 ventral than on the dorsal side. The cone-shaped cephalic lobe is not divided 

 from the protosoma (Fig. 89Д B), and the crown of tentacles is attached at 



Fig. 89. Oligobrachia dogieli: A - front part of the body of a male in dorsal view; В - the same in 

 ventral view ; С - a portion of the middle part of the preannular region in ventral view ; D - zone of 

 thickened papillae from the left side; E - region of the girdles in ventral view; F - the same from 

 the dorsal side; G - part of a girdle; H - toothed platelets. 



an - girdles of toothed platelets ; с - cephalic lobe ; со - dorsal ciliated band ; с t - tentacular crown ; 

 da - anterior group of teeth; dp - posterior group of teeth; /- keel of the bridle; go - genital 

 papilla; gp - genital pore; gt - pyriform glands seen by transparency; ms - mesosoma; tnts - meta- 

 soma; pa - papillae; ps - protosoma; s 1 - groove between the protosoma and the mesosoma; 

 s 2 - groove between the mesosoma and the metasoma ; sv - ventral sulcus ; vd - dorsal blood vessel 

 seen by transparency; vv - ventral vessel seen by transparency. {A, B, C, E, F - after Ivanov, 

 1957a.) 



