SEGMENTATION OF CERTAIN POLYCHJITES. 



535 



Of these, No. 24 is the most remarkable. The irregularly- 

 segmented part is represented in fig. 3. From this figure and 

 the key attached (3 b) it will be seen that there is one spiral 

 of two coils beginning in the middle of and intertwined with 

 another of seven. 



With regard to the internal organs : wishing to preserve 

 one intact specimen of each kind of spiral, 1 have only been 

 able to cut sections of two of the specimens at ray disposal 

 (namely, Nos, 5 and 6 from the Madras collection). The con- 

 dition in which the specimens were was not such as to guarantee 

 any results from dissection, and horizontal sections seemed, 

 therefore, the best method of examination. The sections of 

 one of these specimens. No. 6, were worth very little, as 

 the animal was rather broken in the twenty-first segment, and 

 consequently only the anterior part of the spiral could be cut. 

 From the other specimen, of which I cut sections. No. 5, all 



