98 



IIYDRACARINA 



considsrable length and thickness and a great number of shorter and thinner lateral teeth. 

 These are so arranged that about 15 stand on one side, about 5 on the other side of the long 

 tooth. Seen from the side, the last segment of the leg shows a deep incision and the upper 

 side of the segment, which limits the incision from above, forming a long, triangular projection 

 (see the figures for the following species). Especially the segments 3 and 4 exhibit a row of 

 stiff bristles of middle length along the extensor side. The number of these bristles does not 

 exceed 7. On the lirst leg these bristles seem to be a little shorter than on the others. 



Figure 6. — Calonyx montanus sp. n. A, animal from beneath (S) ; B, maxillary organ from the left side ( $) ; 

 C, palp ( 5 ) ; D, E, claws ( 9 ) ; F, genital organ (S) ; G, genital organ ( 2 ) . 



The structure of the genital organ shows that the species in question is a true Calonyx, 

 genital plates being present. These plates, however, are extremely poorly developed, consist- 

 ing only of a narrow strip of chitin, wide enough just to support the bristles, which are 

 inserted to the number of about 12, forming a single row. The strips are so short that only the 

 anterior half of the genital organ is enclosed by them. Three pairs of acetabula are situated 

 here, whilst the rest lie behind the strips. These latter acetabula are more numerous and 

 more elongated than the others. The genital lips inside the acetabula are furnished with 

 some very small, but rather high and well-marked papillae. Posterior to the genital organ 

 the skin is chitinized as a small shield. 



9 . The female diiifers, except in its larger size, very little from tlic male. The antero- 

 medial border of the third epimeron is perhaps somewhat more prominently arched, forming 



