104 



EISEN 



HENLEA EHRHORNI sp. nov. 



pi. xv, figs. 2-6; text-fig. 69. 



Definition. Length 12 mm., width .5 mm. Somites about 67. 

 The anterior few somites deeply pluri-ringed ; the posterior ones, com- 

 mencing with about VII, are smooth and indistinct. Setas generally 

 four in each fascicle, the inner setae much smaller. The most ventral seta 

 in the ventral fascicles and the most dorsal seta in the lateral fascicles 

 are larger than the others. No dorsal pores. Head-pore large, be- 

 tween prostomium and somite I. Prostomium short, blunt, and 

 rounded. Clitellum XII and XIII. Sexual papillae small and square. 

 Septal glands in IV to VI. Peptonephridia extending into VI. 

 Brain oblong, posteriorly truncated, anteriorly convex. Dorsal vessel 

 rises in VIII. Intestine tubular until VIII, in which somite it is fur- 



FIG. 69. Henlea ehrhorni. 



nished with two lateral diverticles. Sacculated intestine commences 

 in IX. Spermathecae with pyramidal ampulla and furnished with three 

 knob-like diverticles. Penial glands of four kinds, confined to the 

 bulb. Nephridia large, with large anteseptal ; inner ducts of varying 

 thickness. Lymphocytes large, as wide as the body-wall is thick, 

 rounded-oval. Color yellowish-white. 



Locality. Mountain View, San Mateo County, California. Col- 

 lected by Prof. Edward M. Ehrhorn, the well-known entomologist, for 

 whom the species is named. 



DETAILED DESCRIPTION. 



Setce. The setae are more curved in the anterior somites than in 

 the posterior ones. The most ventral setae are very much larger and 

 especially thicker than the other setae in the ventral fascicles. In H. 



