Gatty M<irine Lahoralori/, Sf. Androos. J 27 



region, between tlie ciglith and ninth setigerous region, is a 

 transversely striated glandular band as between the seventh 

 and eighth segments, and tliis band continues to the last 

 setigerous process. In the large examples the glandular 

 setigerous region at each side is connected by a ventral band 

 of the same tissue, and often an accessory central piece 

 behind it, but toward the tail these are less marked. Two 

 elevations on each side in front of the caudal plate have no 

 hooks or bristles, but they seem to be glandular. 



The bristles project from the dorsal end of each row of 

 hooks, and consist of two groups, viz., an anterior with a 

 marked curve after the appearance of the wing (PI. III. fig. 2) 

 and with a finely tapered tip, and a posterior group which 

 in the first foot have a similar shaft with a straight tip, with 

 narrow wings and a few distinct spikes on the finely tapered 

 extremity (I'l. III. fig. 3). In the next bristled segment 

 (second) the anterior bristles with the curved tips and broad 

 wings have the tapering tips furnished with one or two 

 pairs of spikes which arise opposite each other. The long 

 posterior (or inner ?) bristles have narrow wings with long 

 hair-like tips, the stronger series of which do not show 

 spines thereon. A more slender series, however, has the 

 very long hair-like extremity minutely and symmetrically 

 spinous. The succeeding feet present bristles with larger 

 and longer hair-like tips in both series, and these delicate 

 extremities are all similarly spinous, that is, the sides are 

 armed with symmetrical pairs of spikes. Toward the 

 posterior extremity, as in the last two bristled segments, the 

 bi'istles are very long, yet each group retains certain of the 

 characters observed in front : the anterior series showing the 

 curvature of the tip, and both having long and attenuate 

 spinous prolongations, the posterior, however, far exceeding 

 the other in length. The hooks (PI. 111. fig. 4) are charac- 

 terized by a long curved shaft which gently enlarges from 

 the base to the shoulder and is striated and tinted. The 

 tip is contracted beyoiid the shoulder, is paler, then gently 

 dilates to the neck and crown, the centre being also striated 

 longitudinally. The great fang leaves the neck at somewhat 

 less than a right angle, and has a little below it a tuft of stiff 

 hairs, which often curve upward beyond the fang. The 

 great development of the spines behind the main fang makes 

 the crown broad, though only t«o spines can cleaily be 

 made out in lateral view. In antero-posterior view, in all 

 probability, additional points may be seen. 



Arwidsson notes that the segmental organs extend from 

 the seventh to the ninth segment. 



