Lyrifonn Organs 41 



Amongst Laniatores we have examined Phalangodes Piochardi Sim., but we are not in a 

 position to give more than a summary aocouut of the occurrence in that species of these organs. 

 We are unable to point out any line on the surface of cephalothorax with perfect certainty, 

 because it was not possible to decide whether certain formations, extremely few in number, near 

 its lateral margins, which looked like fissures, were lyriform organs or not. But lines were 

 found on nearly all the abdominal tergites and sternites, from two to five on each, and they 

 occur probably on them all. On the large plate formed by the fusion of the second and third 

 sternites the organs are grouped as in Phalangium and Neinastoma, and in all three types in 

 such a manner that their distribution agrees with the view that the plate is composed of 

 two sternites. Antenna* have a line on the outside of the basal joint. On palpi a line is 

 found on the in.side of the trochanterial part ; there is another small one on the inside of 

 the femoral part ; two very long ones are found on the dorsal side and a small one on the 

 middle of the inside ; the tarsal part has a long line on the outside. The walking legs 

 have one or two lines on the proximal part of coxa, one on trochanter, at least one very 

 long transverse line on the dorsal side of femur near its distal extremity, and one or two long 

 transverse lines across the dorsal side of metatarsus near the end, but we could not 

 decide with certainty whether this joint al.so possesses some small longitudinal line, such as 

 Hansen (6, p. 196) found in Pitch ijloides unciiiatus W. S. 



It will be seen that the distribution of the lyriform organs in the small representative 

 of Laniatores which we have examined agrees to a considerable extent with our account of 

 the arrangement in Palpatores. We consider it probable that in types of different families of 

 Laniatores lines will be found in parts of the limbs where we have not discovered any such 

 in Phalangodes, as is the case in Pachyloides just mentioned ; but it is extremely improbable 

 that an essentially different distribution or grouping will be met with. We are, however, 

 compelled to content ourselves with these remarks, because the search for these organs in 

 Laniatores is extremely difficult on account of the peculiar nature of the skin, which renders 

 the complete sacrifice of the specimens necessary. 



Amongst Cyphophthalmi we have searched for lyriform organs only in a male PurcelUa, 

 illustrans, which sj)ecies in a measure occupies an intermediate place between the two most 

 widely separated genera, Stylocellus and Parasiro, and at the same time is comparatively well 

 suited for such an investigation. On cephalothorax we found a comparatively small number 

 of scattered, rather short lines. On the abdominal tergite.s only a few rather short similar 

 lines were found, which were extremely small on the small ninth tergite. On the large, 

 apparently first, sternite there are four pairs, the grouping of which agrees with the view that 

 this plate is really made up of two ; the following well-developed sternites have four to five 

 lines each ; on the last three sternites which are so peculiarly developed in the male we have 

 not found any lines nor any on the large anal valve; but on account of the uneven convexity 

 of these pieces it is almost impossible to carry out an investigation of them in such a way that 

 a negative result could be safely taken as decisive. On the inside of the basal joint of 

 antennae there are three long or even very long scattered lines, whilst a solitary short one 

 is found on the outside ; the second joint has five short or very short scattered lines on 

 the inner side, and two on the outer side. The mandibles appear to have one near the 

 insertion of palpus. The trochanterial and femoral parts of palpus have a line each on the 

 outer side near the apex ; the patellar part has one near the lower edge. We did not succeed 

 in^ finding any lines on coxae of the walking limbs except on the first pair where one is 

 found near the proximal extremity. We have besides particularly examined a leg of the 



s. 6 



