Gatty Marine Luboratori/j St. Aiiireios. 



255 



llicjc are two imuli more slender bristles witli lon^, tapering, 

 (lia|)liaiions, terminal |)iccos, apparently larval ventral bristles. 

 The dorsal have the adult structure, being slender, tapering, 

 iiair-like, serrated bristles. The dorsal cirrus is much en- 

 larged at the base, but with a slightly tapered tip. Viewed 

 from below the ventral cirrus shows a similar dilatation 

 (ceratophore) at the base and a two-jointed cirrus, a globular 

 pa|)illa occurring sonic distance inwards. 



The body, which is marked by transverse lines, terminates 

 posteriorly at this stage in u broad pygidium. The three 

 pairs of scales of a globular outline are borne on pedicles, the 

 outer c^<^e. of each having several large truncate papillaj 

 which greatly exceed the proportions in the adult. 



In the next stages, found on the same date, the snout is 

 truncated and the caudal process has a dimple in the middle. 

 Then the head becomes delined as an oblong mass, rounded 

 in front, and flanked on each side by the tentacular cirri, which 

 are now directed forward. There are still only four bristled 

 feet. The cilia on the scales arc larger, and two short broad 

 caudal cirri have ap])eared under tiie pygidium. 



Anterior end of youn*,' Fholoe, X KJO. 4th Februar}-, IS'M. 



The bottom tow-net again procured, on the 4tli February, 

 in 5 fathoms, a young Pholoe having thirteen bristled feet on 

 each side. The head bears in front two closely approximated 

 median eyes (fig. 1) and two are more widely situated towards 



