658 



FRESH-WATER BIOLOGY 



49 (50) 



Teeth 12-16 pairs; annuli VII a* and VIII a' enlarged, but only 

 slightly subdivided; color variable, usually blotched. 



Haemopis marmoratis (Say) 1824. 



Fig. 1006. Eaemopis marmoratis. External morphology, 

 showing sensillae, annulation, and limits of somites. 

 c, clitellum; V-XXVII, somites; 61, 62, <h, h, h, the five 

 annuli of somite XV. X ij. (Original.) 



Fig. 1007. Haemopis marmoratis. Reproductive organs, 

 dissected, al, atrium or penis sheath; de, ductus ejacula^ 

 torius; ep, epididymis; gXI-XVI, ganglia XI-XVI 

 ga, albumin gland; gp, prostate gland ; os, ovisac; ode, 

 common oviduct; ffv, ovary; ss, sperm sac; /1-3, testes 

 va, vagina; vd, vas deferens; $ male orifice; 9 female 

 orifice. X 2. (After Moore.) 



50 (49) Teeth 20-25 pairs; annuH VII a^ and VIII a', completely subdivided; 



color gray or plumbeus with no or few spots, usually a 

 median black and marginal orange stripes; size very large. 

 An aquatic and a terrestrial variety. 



Haemopis lateralis (Say) 1824. 



51 (48) Jaws absent or rudimentary; no teeth 52 



52 (53) Upper Hp relatively narrow and arched; ^ orifice XI ftV^S 9 



XII h^/h^; protruded penis very slender and straight; ven- 

 tral ground color paler than dorsal; dark blotches always 

 present; size very large. . Haemopis grandis (Verrill) 1874. 



53 (52) Lip relatively broad and flat; genital pores near middle of XI b^ 



and XII b^; protruded penis very long, rather thick and 

 twisted; ground color nearly uniform; dark blotches fre- 

 quently absent or few; size moderate. 



Haemopis plumbeus Moore 191 2. 



