The Arenicolid(B of South Africa. 



11 



bouring crotchets is 43 p in diameter. This slender crotchet and the 

 next one to it are drawn in Text-Fig. III. They are from near the 

 middle of the neuropodium, and the rostrum of the stouter one is 

 rather worn away at its tip. 



The crotchets of A. loicni are intermediate in their characters 

 between those of large examples of A. marina and A. cristata, but 

 more nearly approach the latter. 



6 xllO 

 TEXT-FIGURE III. 



Arenicola lovtni. Two adjacent crotchets from a Saldanha specimen. The left 

 one is abnormally slender, x 110. 



GILLS. 



There are in each specimen thirteen pairs of gills, the first pair 

 being situated on the seventh segment. In all the specimens the 

 first gill is small, in one of the Saldanha examples the first left gill 

 is represented by a minute tri-lobed tubercle. The successive gills 

 increase gradually in size up to about the tenth, which is usually the 

 largest ; the last gill is distinctly smaller than the preceding one. 



