128 



6 (13) Spermatheca with ampulla having a diameter little or no greater 



than duct; anteseptal part of nephridium small. 

 7(12) Dorsal vessel arises in \'III ; peptonephridia connected with 



digestive tract in IV. 

 8 (11) Two accessory glands at ectal opening of spermathecal duct; 



spermathecgs slightly bent. 

 9(10) Brain wider than long, concave anteriorly and posteriorly; 



spermathecas with lumen approximately straight . . calif ornica 



10 (9) Brain almost square with only posterior margin concave; 



spermatheca with an expansion in lumen for storage of 

 spermatozoa which is connected with lumen of intestine by 

 a long narrow contorted canal calif ornica, var. helenoi 



11 (8) Four or more accessory glands at ectal opening of spermathecal 



duct ; spermathecse sharply bent . . . calif ornica, var. monticola 



12 (7) Dorsal vessel arises in IX; peptonephridia connected with di- 



gestive tract in A' urhanensis 



13 (6) Spermatheca with well-developed oval ampulla; anteseptal part 



of nephridium approximately as large as postseptal part.... 

 guatemalce 



14 (5) One intestinal diverticulum, which in A'lII completely surrounds 



the digestive tract moderata 



Henlea moderata n. sp. 



(Plate VIII, Figs. 1-12) 



Definition. — Length, 13-19 mm., average about 16 mm. Diameter, 

 0.48 mm. Somites, 46-58. Color, whitish yellow. Prostomium some- 

 what tapering. Head pore at o/I. Dorsal pores absent. Setae of 

 unequal length, inner ones slightly shorter; slightly bent; variable in 

 size, inner ones finer; 3-6 per bundle in anterior part of body, 2-4 

 in posterior part. Clitellum on ^XI-XIII. Lymphocytes elliptic- 

 al. Brain about one half longer than wide; anterior margin con- 

 cave; posterior one deeply emarginate; lateral margins convergent 

 cephalad. Peptonephridia present and well developed, connected with 

 digestive tract in V ; dorsal and ventral strands in close contact with 

 alimentary canal ; ventral strand in VI and VII gives rise to a number 

 of tubules which project into coelom. Four "taste organs" in buccal 

 cavity, each one provided with a muscular strand w^hich extends to 

 the body wall. CEsophagus passes abruptly into intestine in VIII. 

 Intestinal diverticulum present in VIII, entirely surrounding digestive 

 tract; composed of numerous tubules which ultimately unite into 

 about tweh-e main tubules, by means of which connection with diges- 

 tive tract is effected. Dorsal vessel arises in IX. Each nephridium 

 wath small anteseptal part; postseptal part about two and one half 



