1910.] 



NATURAL SCIENCES OF PHILADELPHIA. 



19 



and widely separated at the base. The head-pore is situated between 

 the prostomium and first segment. 



The brain (fig. 1) is concave before and behind. The length exceeds 

 the breadth, and the greatest breadth is near the posterior end. No 

 salivary glands were observed. The ccelomic corpuscles are large, 

 flat, broadly oval to circular disks. 



.The intestine widens out somewhat gradually at the beginning of 

 the 9th segment. There are no intestinal pouches. The dorsal 

 vessel rises in the 9th segment, and the blood is colorless. Three 

 pairs of septal glands are present in the 4th, 5th and 6th segments. 



The nephridia (fig. 2) have a large anteseptal, somewhat longer 

 than broad. The postseptal is 2 to 3 times as long, and the duct, 



Fig. 1. — Henlea scharffi sp. n. The brain. 



Fig. 2. — The nephridium. 



Fig. 3. — The spermatheea. 



Fig. 4. — The spermatheea seen through the body of the worm. 



which equals the postseptal in length, rises from the anterior end. 

 The spermathecae, which lie in the 5th segment, are long and slender, 

 showing no differentiation into duct and ampulla (figs. 3 and 4). The 

 opening to the exterior is surrounded by a large rosette of glands. 

 Fig. 4 shows this from the inside. 



This description is very inadquate, owing to the lack of material, 

 but sufficient was seen to differentiate this form from all other species 

 of the genus. H. scharffi is characterized by the structure of the ne- 

 phridia and spermathecae, the number of setae, the place of origin of 

 the dorsal vessel, and the absence of salivary glands and intestinal 

 pouches. 



This species falls into that somewhat unsatisfactory section of the 

 genus which is characterized by the absence of intestinal pouches. 

 This group includes: 



1. Henlea dicksoni (Eisen). 



