74 Illinois State Lahoratonj of Natural History. 



Lumbricus rubellus, HofEm. 



Somites 95-150; bi- or triannulate. Clitellum on somites 

 26, 27-31, 32. Tubercula pubertatis on somites 28, 29, 30, 31. 

 Length 70-120 mm. Newfoundland (Eisen). 



Lumbricus j^urpureus, Eisen. 



L. purpureus, Eisen, Ofv. af K. Vet.-Akad. Forh., 1870, Xo. 10, p. 

 956. 



Somites 90, bi- or triannulate. Clitellum on somites 28-33. 

 Tubercula pubertatis on somites 29, 30, 31, 32. Length of liv- 

 ing worms 50-70 mm., of alcoholics 30-50 mm. Niagara, 

 Canada (Eisen). 



FAMILY ACANTHODEILID^. 



This family is represented by the genus Diplocardia, which 

 has been described in the first division of this paper. Hundreds 

 v^ere seen this spring in this locality, migrating during showers 

 of rain. 



FAMILY PLUTELLID^. 



This family is represented by Plutellus heteroporus., de- 

 scribed by Perrier, in 1873, from Pennsylvania. The following 

 characters will serve to distinguish it from other worms: Setje, 

 eight in each somite, equidistant. Sperm atheca;, a pair in each 

 of somites 5, 6, 7, 8, and 9, each with a blind appendage. 

 Entire nephridium in one somite, not extending through the 

 anterior septum. External outlets of oviducts in somite 10, in 

 line with inner seta). External outlets of vasa deferentia in 

 somite 18. Clitellum in somites 14, 15, 16 and 17. A '' pros- 

 tate gland" and penis present. Length 150 mm. 



FAMILY PERICHiETID^. 



A fine species of the genus Pericha^ta is becoming common 

 in the hot-houses of the University, where it has probably been 

 introduced with exotic plants. The numerous described species 

 of this genus have been obtained chiefly from southeastern 

 Asia, and, as far as [ know, this is the first record of its occur- 

 rence in North America. I have not seen all the published 



