310 



PART II. SYSTEMATIC ACCOUNT 



Length of the tentacle up to 10-5 



Length of the fore-part of the body 0-8-1-5 



Breadth of the fore-part 0-08-0-1 



Length of the metameric section of the trunk 2-0-3-5 



Length of the whole preannular section up to 18-5 



Length of the postannular section up to 15-0 



Overall length including tentacle 25-40 



Fig. RR133. Siboglinum exile: A - part of the nonmetameric region of the trunk from the right 

 side; В - first and second girdles from the left side; С - the third girdle, from the left side; D - part 

 of a girdle ; E - toothed platelet from the side ; F - part of the postannular region from the right. 

 an - girdles; da - anterior group of teeth; dp - posterior group of teeth; g- glandular portion of 

 the epidermis ; pa - papillae ; pan - postannular region ; sc - dorsal shield ; v - ventral papillae. 



