434 WILHELM MICHAELSEN. 



cushions, form a large, rounded, roof-shaped projection, and 

 the walls are quite smooth. The cushions of the eighteenth 

 and twenty-second segments form the gable ends, the tops of 

 which are connected with each other by the furrow which 

 separates the two copulatory walls from each other. There 

 are three pairs of copulatory papillae bearing the ventral 

 set* of the twelfth and twenty-third segments and the lateral 

 setie of segment 12. The two papillge of each side of the 

 twelfth segment are placed upon a common glandular cushion. 

 The lateral seta? of the fifteenth to the seventeenth segment 

 are provided in the type-specimen of f. typicus with special 

 glandular papilla?. Even if such glandular specialisations 

 Avere present in f. howickianus they would not be con- 

 spicuous, as the space is occupied by the thick layer of the 

 clitellum. I believe that they are absent in f . h o w i c k i a n u s, 

 just as the corresponding glands are also absent. 



■The male pores (on twentieth segment near the middle line 

 in f . typicus) could not be detected. 



The female pores on the top of minute semi-transparent 

 papillae, which are situated somewhat medially on the inner 

 side of the lines of setsea (not laterally to them as in f. typicus 

 according to Cognetti), are placed at the hinder margin of 

 the fourteenth segment, where there are two small convexities. 



Spermathecal pores are inconspicuous ; there are generally 

 four pairs placed on the furrows between the eleventh and 

 tw^elfth segments and the tw^elfth and thirteenth segments in 

 the lines of the ventral and lateral seta?. The external pore of 

 the left front pair was replaced by two in the specimen which 

 was examined in detail. 



Internal Anatomy. — The septa between segments 4-9 are 

 all more or less thickened ; septum 4-5 only slightly, 6-7 

 and 7-8 strongly, 5-6 and 8-9 moderately. 



Alimentary Canal. — There is a large gizzard in the 

 seventh segment scarcely reaching into the sixth segment. 

 A pair of large, nearly globular calciferous glands occur 

 dorso-laterally on the oesopliagus in the ninth and tenth 

 segments. The hearts of segments 9 and 10 cling closely 



