BY PKOFESSOR T. THOMSON FLYNN. 93 



the case of the fourth pair, but they do not approach, 

 even in this case, the size of the trunk eminences. 



The ocular tubercle is placed a little distance away 

 from the anterior border otf the cephalon, and points 

 slishtly forward. It is somewhat conical with the apex 

 sharply rounded off. The posterior side of the ocxilar tuber- 

 cle passes over into the anterior side of the first trunk 

 eminence by means of a shallow curve. Visual elemients 

 are not well marked. 



The proboscis is about two-thirds the length of the 

 trunk, and points somewhat obliquely downwards. The 

 basal half or so^ is of greater diameter than the distal 

 portion. Proceeding from its base, the proboscis very 

 gradually expands to a maximum, after which it suddenly 

 contracts, there being here a wide shallow groove en- 

 circling it. From this groove to the rounded mouth 

 extremity there is a very slight taper. 



A lateral view shows that the dorsal lip projects 

 slightly beyond the others. 



The abdomen arises from^ the posterior end of the 

 last trunk segment between the last pair of crurigers. 

 It is longer than, the first coxa of the hind limb, and 

 tliis joint closely flanks it on either side. It has a slight 

 tendency upward from the hoirizontal, and increases 

 slightly in width from before backwards. It ends in an 

 almost straight margin surmounted by a, small median 

 tubercle. 



'The legs are strong and stout. Thei three coxal 

 joints are short and thick. The second is the longer of the 

 three. In the case' of thei last limbi only, the first and 

 second coxae bear each a small dorsal tiubercle at the 

 distal end. In this position on the coxse of all the legs 

 is a yellowish spot of circular outline. This, as Bouvier 

 suggests for Pcntaijycnon charcoti (9), possibly represents 

 a gland of some sorti. Posterior to this spot in Pycno- 

 f/onum. aurilineatum on the second coxa, of each of the 

 posterior pair of limbs is the rounded reproductive aper- 

 ture. The femur is very stout and of a. complicated 

 shape. At its coxal end it. is narrow, but soon expands 

 and preisents, on its ventral side, a prominent tubercle. 

 It then curves towards the dorsal side, where there is 

 another distinct elevation, much better developed than 

 is the case of thei former one. It then curves ventrally 

 and bears at itsi distal end two rounded tubercles, only 

 one of which can be seen in the lateral view shown in 

 the figure. The first tibia is a little shorter than the 

 femur and is somewhat similar in shape to that of Pycno- 



