IIYDRACARINA 



99 



a more distinctly marked medial border than in the other sex. There is a well-developed 

 anterior supporting chitinous piece for the genital organ, and the genital lips are projecting and 

 provided with big papillae all over. The posterior acetabula are more elongated than in the 

 male and the posterior part of the genital plates seems to be bent out laterally. 



Locality. Indian Tibet: c. 1 mile W. of Dras (K76), altitude c. 3081 m., 21 May, 

 1932 (temp. 19.0°C.). 



The present species differs from all hitherto described Calony.v species, except C. latus, 

 by the claws being split up into a very large numljer of teeth. 



5. Calonyx flagellum sp. n. 



9. A rather large species, measuring about 1550-1640^1 in length. The body is broad, 

 attaining a breadth of about 1320j«. The frontal organ is bigger than that of the foregoing 

 species and has the shape of a distinctly marked circle. Of the dorsoglandularia only the first 

 pair (=antenniformia) is situated anterior to the eyes, whilst the second pair lies on a line 

 connecting the posterior margins of the eyes. In this respect the species differs from the 

 above-described Calonyx species and the Frotziella species as well, whereas the concordance 

 with Calonyx montanus as to the situation of the third pair of dorsoglandularia is complete. 

 The glandularia are characteristic, supported as they are by a very conspicuous, subcutaneous 

 framework of chitin. This consists of three rings of different shape. In the drawing the 

 lowest circle is black, the middle one is dotted, and the highest one, which lies immediately 

 under the skin, is not marked in any special way. The latter embraces the fissure-shaped 

 opening of the gland. 



The maxillary organ is differently shaped, compared with that of the previous species. 

 The rostrum especially is dissimiliar, being bent ventrally and abruptly truncated at apex, 

 without the ventral, projecting tip, so well marked in montanus. The upper dorsal margin 

 differs also in being quite straight, not undulated. The organ is 362/*. long. Seen from above 

 it is more alike in both species, though a little wider in the present one. The lengths of the 

 palp-segments are (in ii) : 



The length of the mandible from the base to the tip of the mandibular membrane is 

 362/x and that of the claw 153/*. 



As in C. montanus the anterior corners of the first three pairs of epimera bear bristles 

 about equal in number to those described above. Most of those on the first pair are devel- 

 oped into strong, short spines. The third epimeron projects inwardly at the antero-medial 

 corner, thus dift'ering very much from the preceding species. The greatest lengths of the 

 anterior and posterior groups of epimera respectively are 332 and 357/*. 



The bristles, mentioned in the foregoing species as bordering in particular the extensor 

 surface of the segments 3 and 4 in the legs are longer and more conspicuous in the present 

 one. The claws are shaped as in C. montanus, but the main claw is shorter and thinner, not 



