ZEN KEV ITCH I AN A LONGISSIMA 



389 



ventrally. In front of the bridle runs a 

 sharp mid-ventral furrow. The fore- 

 part of the body is divided from the 

 trunk by a slanting, annular groove, 

 the ventral part of which lies a little in 

 front of the dorsal (Fig. 9). The an- 

 terior, metameric part of the trunk has a 

 well-marked ventral sulcus (Fig. 1535) 

 running between lateral ridges on 

 which are arranged the more or less 

 metameric, paired papillae. These may 

 be round or oval and the front ones 

 are smaller (Fig. 1535), increasing in 

 size several-fold farther back (Fig. 

 154v4). Inside each of them several 

 pyriform glands may be discerned 

 through the integument, but they lack 

 cuticular plaques. In one individual 

 40 papillae were counted on the left, 

 38 on the right. The rather broad, 

 dorsal ciliated band begins at the front 

 end of the trunk (Fig. 1535). The 

 large genital papillae of the male are 

 laterally compressed and project for- 

 ward (Figs. 9, 1535). The very long, 

 cylindrical non-metameric part of the 

 trunk is dotted with small ventral or 

 lateral, glandular papillae which bear 

 adhesive plaques (Fig. 1545). The 



Fig. 153. Zenkevitchiana longissima. Front end of a 

 male; A - in dorsal, and, В - in ventral view. 

 с - cephalic lobe ; со - dorsal ciliated band ; / - 

 keel of the bridle ; go - genital papilla ; ms - meso- 

 soma ; pa - papillae ; ps - protosoma ; s 2 - groove 

 between the mesosoma and the metasoma; sph - 

 spermatophores, seen by transparency through 

 the body wall; sv - ventral sulcus; t - tentacle. 

 (After Ivanov, 1957д.) 



