Table 2 

 Characteristics of the species of Siboglir, 



Breadth/length ratio of 



fore-part 

 Presence of pinnules 

 Number of rows of 



pinnules 

 Pretentacular groove 

 Keels fused ventrally 

 Keels fused dorsally 

 Glandular girdle on 



Glandular strips on 

 mesosoma and 

 metasoma 



Number of papillae in 



zone of thickening 

 Number of girdles of 



toothed platelets 

 Number of rows of 



toothed platelets 

 Length of toothed 



platelets (/0 

 Breadth of mesosoma (jx) 

 Length of spcrmatophore 



M 



7-10 5 6-8 5-7 4-5 



12-15 12-16 10-11 17-23 



2-3 2-3 1-3 



6-5 8-9 6-7 4-5-5 



5-6 5-6 4-5-5 



10 9-12 6-7 6-10 5-11 



+ + — 



3 30-40 ? 



2 2-3 2-3 



2-4 1-4 1 



11-13 12-19 12 10-11 15-20 11-12 16-18 11-12 12-15 9-12 13-14 8-10 9-12 11-12 10-11 10-15 16-19 11-13 14-18 10-12 10-12 



8-5 7-11 7-8 8-9 



— — + 



90 100-150 170 200 500 250 170 250 200 100 250 100 120 180 150 

 40 150 ? 250 ? 230 300 



100 150 100 160 140 

 140 160 ? ? ? 



200 200 360 360 150 100 100 230 65 270 200 200 250 

 ? ? ? 500 50 190 ? ? ? 350 ? ? • 



10-17 11-17 11-12 

 180 100 90 



14-18 15-18 

 250 200 



