HANSEN: ON SIX SPF.CIKS OF KOFNENIA. 237 



of the intestine, and furthermore she writes: »The intestine and 

 diverticula are invariably filled with food particles, which have 

 the appearance of yolk granules . Dr. Sijrensen has asked me 

 to state that at least as to the diverticula in the abdomen this 

 is certainly incorrect (and I share his opinion). In his extensive 

 treatise on the anatomy of Opiliones La7iiatores (Naturh. Tids- 

 skrift, 3 R. B. XII, 1879) he has proved (p. 170 — 71) that the 

 four pairs of large diverticula in Op. Lmiiatorcs are glands and 

 not besides reservoirs for food; Tulk (referred to by Dr. S) has 

 found no particles of food in the diverticula in Op. Palpatorcs. 

 ^^'e think that the diverticula in question never contain food in 

 any order of Arachnids. 



Copenhagen, Nov. 4. 1901. 



Explanation of the Plates. 



PI. 2. 



I. Koenenia mirabilis Grassi (et Cai.amikuccio); female. 

 Fig. I a. Posterior part of tlie large cephalic sternum with its hairs, x 120. 



— I 1). \'entral surface of the second ahdominal segment and the distal 



part of the genital lobe of the third segment (shaded with grayish 

 tint), seen from below, x 165. (From a preparation treated with 

 caustic potash). 



— I c. Complete flagelluin in contracted state of preservation, x 87. (_)f 



the very long seta' in the whorls on the thickest part of the joints 

 onl\- two are drawn in each whorl. 



— I d. Sixth to tenth joint of the same flagellum, X 196. The retraction 



of the liasal part of the joints into the preceding joints. is clearly 

 seen, but the apical subjoints of the seventh and the ninth joints 

 retracted into the main joint could not be drawn, and the suture 

 between the basal part and the main joint in the eight and tenth 

 joint is also omitted. 



— I e. The three last joints of the same flagellum, x 196. The plumose 



clothing is omitted. 



— I f. Fourth to sixth joint of an extended and slightly flattened flagel- 



lum, X 145 ; yf». a])ical sub joint (with some of its glabrous seta-) 

 separated liy a narrow membrane from the main part [ci) of the 

 fifth joint; (/. basal subjoint separated by a suture from the main 

 part (/;) of the sixth joint, which is somewhat longer than the 

 fifth. 



45 



