Furtlier Observations on Koeneiiia. 427 



of appendages. The anterior and broader pair has an irregulär 

 inner edge and is armed with three pairs of plumulose setae. It is 

 tliis region witli its irregularities whicli gives rise to the papillary 

 appendages. while the short triangulär and distinctly paired projections, 

 with their two pairs of setae, form the long triangulär pair of ap- 

 pendages. An inverted-shaped row of six setae extends over the 

 breadth of the anterior appendage — about the line of its union with 

 the body-wall. The appendages of the third segment at this stage 

 are slight elevations that remind one of diminutive oyster Shells 

 or highly magnified grains of potato starch. At their onter limit 

 each one possesses a seta. 



The female appendages are much simpler and are surprisingly 

 like the corresponding appendage of K. mirahüis. The ventral portion 

 of the second segment is prolonged posteriorly and grooved in the 

 mid-ventral line, giving a slightly paired condition to this orgau. 

 Two pairs of short stout setae, rather characteristic of K. mirabilis, 

 are found on its posterior edge in the region of the groove. Higher 

 up a pair of setae arise while still further anteriorlj^ along the 

 curved line between the appendage posteriorly and the body-wall 

 anteriorly runs a curved row of six setae corresponding in number 

 and Position to those of the male appendage. The pair of appendages 

 of the third segment is exactly like the corresponding pair in the 

 male, even to the number and position of the setae. 



Flagelliim. Out of the collection of eight specimens, re- 

 presenting this last stage, four had perfect tlagella, while one had 

 ten joiuts of its flagellum which showed that it had been broken 

 at the distal end of the tenth Joint. These flagella represent the 

 most varied condition in the number of joints and arrangement of 

 setae of the Joint. Because of the Variation it seems best to give 

 a hurried description of each flagellum of the specimens in the order 

 in which they were taken. 



1. Female. Flagellum 10 jointed, terminal Joint with une whorl 

 of setae; the ninth segment presented an anomolous condition of 

 two fused joints each of which was equipped with a whorl of plumu- 

 lose setae. 



2. Male. Flagellum 9 jointed, terminal Joint with two Avhorls. 

 Seventh segment with a whorl of smooth setae besides the belt of 

 plumulose ones. 



3. Male. Flagellum, though broken between the tenth and 

 eleventh segment, with normal arrangement of setae. 



