Explanation of Plate VI. 



cJ. Tebminal segments and genital armature. 



Fig. 26, 26a. Photinomorpha simulans, n. sp. : 26, genital arma- 

 ture, partly evaginated, seen from the dorsal 

 aspect, showing the bidentate apical portions 

 of the eighth segment and the long, stout 

 hook on each side of the internal sac ; 26a, 

 ditto, in profile. 



27. Polemius integer, n. sp. : ninth segment and a portion 



of the flattened central tube, dorsal aspect. 



28. „ nigrolimbatus, n. sp. : ninth ventral segment, 



in profile. 



29. „ nigromarginatus, n. sp. : ninth ventral segment, 



in profile. 



30. ,, (Discodon) difficiUs, Gorh. : eighth and ninth 



segments, and a portion of the genital arma- 

 ture, in profile. 



31. „ (Discodon) photinoides, Gorh. : ninth segment 



and a portion of the genital armature, show- 

 ing the very long flagellum, in profile. 



32. 32a. „ tristiculus, n. sp. : 32, ninth ventral segment 



and the partly evaginated genital armature ; 

 32a, ditto, x 60. 



33. „ (Discodon) hivittatus, Gorh. : ninth ventral seg- 



ment and a portion of the genital armature. 

 34, 34a. „ fuscovittatus, n. sp. : 34, eighth and ninth 

 segments, and a portion of the genital 

 armature, in profile ; 34a, ditto, x 60. 



35. ,, megalophthalmus, n. sp. : ninth ventral segment 



and a portion of the genital armature, in 

 profile. 



36. Silis dilacerata, Gorh. : ninth ventral segment and a 



portion of the genital armature. 



37. 37a. Parasilis colyphoides, Gorh. : 37, ventral segments, 



5-7, and the forcipate last dorsal segment; 

 37a, eighth ventral segment and the genital 

 armature. 



38, 38a, 6. Malthaster suturalis, Gorh. : 38, ninth ventral 

 segment and a portion of the genital arma- 

 ture ; 38a, ditto, X 60 ; 386, profile, x 60. 



39, 39a. Ichthyiirus dichelifer, n. sp. : 39, terminal segments, 

 from above ; 39a, ditto, in profile. 



