GaUy Marine Lahoralori/j St. Andincs. 73 



The pale rejiion is loaded with frreenish-whitc ova nicasuriuj^ 

 {'J,^ mm. The va.sc-ularity ot" the feet is proiiouueed. 



Then the deep brownish or olive eolour anteriorly ^ivcs 

 way to a paler <rrccnish brown, the posterior region becoming 

 still more pale as the eyes enlarge. Various isolated and 

 fixed blaek spc eks appear, but whether in the gut or body- 

 wall is not elear. The pallor makes the blood-vessels of the 

 feet and the dorsum eoiispieuous. The head and anterior 

 region retain in some the brownish hue mingled with green 

 for some time, but the tentacles and tentacular cirri are pale 

 greenish. 



At a furtlier stage (24th February) the anterior region of 

 19 segments is olive-green, and the palpi, tentacles, and 

 tentacular cirri pale green, tlie head itself being olive with 

 the white trifid mark posteriorly. The pelagic posterior 

 region is developing and its eolour is pale, while the feet are 

 vascular. The ova are pale greenish with numerous large 

 globules amongst the smaller. 



The epitokciis females hitherto observed are about tlie 

 size of the males, though one or two are larger, and all possess 

 the triradiate band between the eyes and a pale peacock- 

 green eolour anteriorly. The first five dorsal cirri are en- 

 larged at the base, and the ventral cirri of the same feet are 

 slightly swollen. In the altered posterior region the dorsal 

 cirri are also somewhat dilated towards the base (cerato- 

 phorc), and have inferiorly on the enlarged region low 

 ]>apilhe or warts — to which groups of stalked infusoria and 

 also slender filaments of algie adhere. Thus, although the 

 prominent row of papillie which projects from the lower edge 

 of the cirrus in the male is absent, there is a tendency to 

 such grow ths. The ventral cirri present even a more marked 

 tendency to these growths, about four prominent cones 

 being found on the ventral edge, and tlicy also have infusoria 

 and algje. The swimming-bristles in the posterior region 

 are very large. 



Veutrally the same marked distinction between the 

 anterior and posterior regions of the body occurs as in the 

 male, the anterior region being pale — a slightly greenish 

 shade only being visible in the head-region, whereas the 

 j)Osterior is of a deep pinkish purple. This hue is apparently 

 not due to the muscles, as during the movements of the 

 animal the intensity varies, as if from vascular changes. 



