DESCRIPTIONS OF GENERA AND SPECIES 675 



Callidrilus scrobifer, MICHAELSEN. 

 C. scrobifer, MICHAELSEN, JB. Hamb. wiss. Anst., vii, 1890, p. 20. 



Definition. Length, 76 mm.; number of segment*, 248; hinder region of My quadrangular. 



Clitellnm, XF-XXIF; papillae, ten pairs on XI-X7I and XXI-XXIV. Gizzard in 7, VI. 



Septa 7I/riI-XI/XII thickened. ffab.Qmlimane. 



The measurements given above may possibly be a little inaccurate ; for MICHAELSEN 

 had only incomplete specimens to study. The anterior segments bi- to quadri-annulate ; 

 the quadrangular outline of the posterior part of the body recalls the shape of the 

 body in the allied Siphonogaster. The skin is entirely free from pigment. The 

 clitellum was not recognizable in the preserved worm ; the above statement is given 

 on the authority of STUHLMANN who collected the material for MICHAELSEN. The 

 gizzard is stated to be not very clear ; such as it is, it occupies segments v and vi ; 

 the intestine commences in segment xii (about). The last pair of hearts is in the 

 twelfth segment. On segments xvii-xxi is a median ventral raised area, which 

 bears anteriorly the male pores. There are four pairs of grape-like sperm-sacs in 

 segments ix-xii. 



Genus KYNOTUS, MICHAELSEN. 



Syn. Geophagus, KELLEB. 



DEFINITION. Setae strictly paired, absent upon the first few segments. Sperma- 

 thecae, usually many in a segment, occupying segments in neighbourhood of 

 female gonads. Sperm-ducts open on to exterior by a muscular sac ; in adjoining 

 segments are sacs of copulatory setae, with glands appended. 



This genus was originally described by MICHAELSEN (10) from a single, not 

 fully mature example. A second paper, dealing with a second species, permitted 

 a few details to be filled in. More recently ROSA (13) has described a third species, 

 which description has added materially to our knowledge of the genus. Some 

 criticisms by BENHAM (8), which will be referred to later, complete what has been 

 written upon Kynotus. 



This genus contains four species, all of them natives of Madagascar 1 . The setae 



1 It has already boon pointed out that in all probability Acanthodrilus rerticillalus of I'LKKII K is 

 a Gcoscolicid referable to this genus. 



4 R 2 



