ON BENHAMIA CCEOIFERA, N. SP. 107 



its shape, suggest a much convoluted cerebral hemisphere (see 

 fig. 4). 



Each glaud is, on the whole, reniform, and connected to the 

 narrow oesophagus by a short, narrow, but distinct duct. The 

 glands are supplied by a large vessel from the dorsal trunk, 

 and are further closely connected to the septa. 



In the 20th segment the gut enlarges suddenly and 

 forms a wide, thin-walled, dark brown coloured " sacculated 

 intestine,^' constricted of course by the septa. In Segment 

 XXIX, however, the intestine takes on the peculiar character 

 (unknown in its details in any other earthworm) which is 

 referred to in the specific name " csecifera." In each segment, 

 commencing at the 29th, the intestine gives rise to a finger- 

 shaped diverticulum on each side, which is directed upwards 

 and arches over the dorsal blood trunk (fig. 3, c). 



These caeca extend as far as the 52nd segment, the last half- 

 dozen gradually diminishing in size, till the intestine resumes 

 the ordinary sacculated condition. Each such caecum arises 

 by a comparatively broad base from the upper surface of the 

 side of the main gut, and gradually narrows as it curves 

 upwards, to end in a blunt rounded apex. The apices of the 

 pair of caeca of any segment overlap each other above the dorsal 

 vessel. These caeca are thin-walled, and quite unlike the well- 

 known caeca which lie in the 26th segment of the ordinary 

 Perichseta. 



The generative organs conform to the usual Benhamia 

 type. 



There are two pairs of sperm-sacs, in segments xi and xii, 

 each being much divided and having a lobulated appearance. 



The two pairs of prostates are very long, narrow, yellowish 

 tubes of the usual acanthodriloid pattern ; the muscular duct is 

 very delicate at its origin from the gland, enlarging in its 

 slightly winding course, to pierce the body wall : they lie in 

 segments xvii and xix (fig. 5). 



I could detect no penial chaetse; these special chsetae have 

 been noted as lacking in other species of Benhamia. It is a 

 point on which I laid some stress in my note on " The Genera 



