NO. 2174. EARTHWORMS OF THE FAMILY LVMBRICIDAE— SMITH. 169 



Tubercula pubertatis on 28-30. First dorsal pore on 5/6. Sper- 

 miducal pores on 15, between h and c. Oviducal pores on 14, slightly 

 dorsad of b. Spermathecal pores on 9/10 and 10/11, in the seta line c. 

 Septa 7/8 and 8/9 moderately thickened, 6/7, 9/10, 13/14, and 14/15 

 slightly thickened. Sperm sacs in 9, 11, and 12. Spermathecae 

 in 9 and 10, free in somite cavities, with very short ducts which enter 

 the septa near the body wall. 



Specimens collected in Ilhnois have been found in wet soil more or 

 less subject to sewage contamination. 



H. subruhicundus is widely distributed in Europe and in various 

 parts of the world where Em-opeans have settled. It has been re- 

 ported in North America from Newfoundland and Cahfornia. 



New locah ties: Illinois, Colorado, and Canada (Niagara). 



Subgenus BiMASTUS (H. F. Moore), 1893. 



This subgenus includes a group of species, chiefly North American, 

 which have in common the following characters: Tubercula puber- 

 tatis are indistinct or more commonly lacking. There are but two 

 pairs of sperm sacs and these are mil and 12. Normally developed 

 spermathecae are lacking. In most species the clitellum does not 

 extend posterior to 32. 



HELODRILUS (BIMASTUS) PALUSTRIS (H. F. Moore). 



Biraastos H. F. Moore, 1893: 333. 

 Bimastos paliistris 11. F. Moore, 1895: 473. 

 Allolobophora (Bimastus) palustris Michaelsen, 1900: 10. 

 Eelodrilus {Bimastm) palustris IVIichaelsen, 1900a: 502. 



Length, in life, reaches 7.5 cm. Somites, 80-100. Color, pale red, 

 but not due to pigment. Prostomium, epilobic |. Setae closely 

 paired; posterior to clitellum, aa:ah:hc:cd:dd=18A:16:3:27; ventral 

 setae of 13 and 16, provided with special glands. Clitellum on 23-28. 

 Tubercula pubertatis, lackmg. First dorsal pore on 5/6. Spermi- 

 ducal pores at summits of large chambers, formed by invaginations 

 of body wall of posterior part of 15, between seta lines b and c; external 

 openings of these chambers, surrounded by prominent glandular 

 masses. Oviducal pores on 14, slightly dorsad and posteriad of b. 

 Septa scarcely thickened. Chambers at anterior end of calciferous 

 gland open into the esophagus in 10; longitudinal partitions of the 

 gland about 45 in number. Sperm sacs in 11 and 12. Spermathecae 

 lacking. 



H. 'palustris is found m the wet earth of the shores of rivers and 

 ponds. It has been collected in Pennsylvania, New Jersey, and 

 North Carolina. 



