328 PART II. SYSTEMATIC ACCOUNT 



gland. In one specimen 27 metameric papillae were counted on the right side 

 and 26 on the left. The dorsal ciliated band starts at the very beginning of 

 the metasoma. 



This species differs from other Pogonophora in possessing four or five 

 girdles arranged in two groups which are 1-5-2 mm apart. The first group, 

 situated at the hind end of the preannular region (the region which contains 

 the oviducts in the female), is composed of three girdles lying close together 

 one behind the other (Fig. Y133D). A fourth ring, broken on the dorsal side, 

 lies some way farther back (Fig. Y133£, F). Of the two specimens in which 

 I have been able to study the girdle region, one possessed also a fifth girdle, 

 with a broad gap on the ventral side, immediately behind the fourth. Shortly 

 behind the last girdle there is a deeply indented wasp-waist (Fig. Y133£, F). 

 Each girdle bears a single regular row of toothed platelets, shaped like 

 "langue de chat" biscuits. The narrow middle part of the platelet is crossed 

 by a clear transverse line which divides it into two almost equal parts (Fig. 

 Y133G) occupied by the two groups of teeth which point in towards the 

 transverse line. The length of the toothed platelets varies between 15 and 17/*. 



The postannular region of the trunk is very long and tapers gradually. At 

 long regular intervals solitary conical papillae occur on the ventral surface 

 (Fig. Y133/, J); they have no cuticular plaques. Opposite each papilla the 

 dorsal glandular shield is normally made up of a pair of swollen cushions, 

 right and left. Each cushion is composed of a rosette of large epidermal cells 

 surrounding the tiny pore of the multicellular flask-shaped gland within. 



All the specimens studied were females and some contained ripe eggs. 



Measurement of the parts of the body of our specimens gave the following 

 results (mm) : 



The tube is golden-brown in colour. It is smooth, glossy, segmented and 

 ringed. The front end of the tube is transparent and a light yellowish colour 

 soon giving way to the colour of straw. The limits between the segments are 

 sharp ; by reflected light they appear white and glistening. The walls of the 



