4 Annals of the South African Museum. 



and was of rather darker colour. The worms were procured by 

 digging rather quickly with a spade ; they seemed to be about a 

 foot or so beneath the surface." 



SIZE. 



The length of the type specimen was given by Kinberg as 395 

 to 400 mm. On measuring the specimen, I found it to be about 

 405 mm. in length, of which the tail represents about 155 mm. 

 The symbol " \- " by the side of the figure of this worm on the 

 unpublished plate indicates that the figure is natural size, but, on 

 measurement, it is found to be 475 mm. long, of which the tail is 

 about 200 mm. The figure is therefore larger than natural size, and 

 does not accurately represent the relative proportions of the body 

 and tail of the specimen. 



The measurements of the specimens from Saldanha Bay are as 

 follows : 



No. 1. Total length 335 mm., of which the tail is 90 mm. 



No. 2. 335 ,, 195 



No. 3. ,, 175 ,, ,, ,, 55 ,, 



No. 4. ,, 385 ,, ,, 155 ,, 



The largest of these most closely approaches the type specimen 

 in size and in the proportion of its body and tail. It is, however, 

 rather shorter and somewhat stouter in the body region than the 

 type ; its tail is the same length as, but thicker than, that of the 

 type specimen. The diameter of the type is given by Kinberg as 

 20 mm. : the specimen was probably measured near the third or 

 fourth chsetigerous annulus, where it is widest ; its girth at the 

 fourth chastigerous annulus is now about 60 mm. Specimen No. 4, 

 from Saldanha Bay, measured at the level of the fourth chsetigerous 

 segment, where it is thickest, has a diameter of 23 mm. and a girth 

 of 68 mm. ; the diameter and girth of the middle of the tail are 

 16 mm. and 50 mm. respectively. 



Although of such massive proportions, A. lovcni is not the largest 

 species of the genus; it is surpassed in size by A. cristata Stimpson, 

 and is equalled, at any rate in length, by A. marina (L.). The 

 largest specimen of Arenicola known to me is an example, in my 

 possession, of A. cristata from Woods Hole, Massachusetts, U.S.A., 

 which is 515 mm. in length (the tail being 190 mm. long) and 

 75 mm. in girth at its widest point. Examples of A. marina 350 

 to 400 mm. long are occasionally found, the anterior region of which 



