CH. l] EARTHWORMS AND LEECHES 37 



genus Vermiculus Goodrich. Spermathecal in segment 10, male 

 aperture in segment 11, both median, unpaired. Female 

 apertures paired, in furrow between llth and 12th segments. 

 Testes in 10th, ovaries in 1 1th. Dorsal and ventral setae all 

 prong-forked and hooked. 



V. pilosus Goodrich. Blood red. Length 25 to 38 mm. Sea- 

 shore (Weymouth). Clitellum from 10th to 13th and part of 

 14th segment. 



genus Clitellio Sav. Spermathecal in 10th, male apertures in 

 llth, paired. Penis without chitinous bars. Spermatophores 

 in spermathecae. Dorsal and ventral setae all prong-forked 

 and hooked. 



C. arenarius (Mull.). Pale red. Clitellum from 10th to 12th 

 segments. Total segments 64 to 120. Length 30 to 65 mm. 

 Seashore. 



genus Limnodrilus Clap. Spermathecal in 10th, male apertures 

 in llth. Penis with chitinous bars. Spermatophores in 

 spermathecae. Dorsal and ventral setae all prong-forked and 

 hooked. 



L. hoffmeisteri Clap. Bright-red to brown- red. Length of penis 

 bars about eleven times the breadth at proximal end : slightly 

 curved. Total segments about 95. Length 20 to 50 mm. 

 In rivers and streams. 



L. udekamianus Clap. Pink anteriorly, yellow posteriorly, with 

 brownish peritoneal spots in each segment. Penis bars 

 straight, slightly widened distally, length about four times 

 breadth at proximal end. Length 30 to 60 mm. In clear 

 and in muddy waters. 



genus Tubifex Lan., em. Mchlsn. Some of ventral setae prong- 

 forked and hooked ; dorsal with two or more pointed hooks 

 or imperfectly fan-like, and some filiform usually. Sper- 

 mathecal in 10th, male apertures in llth. Ovaries in 

 llth segment, female aperture in 12th. Spermatophores in 

 sperrnatheca. 



T. tubifex (Miill.) (usually known as T. rivuloruni). Red. Length 

 30 to 40mm. In mud of streams and ponds. Penis soft 



