58 EULALIA VIRIDIS. 



variety also is met with. The ventral surface is somewhat pale, with a pale central line. 

 The head is shorter and more rounded than in the green forms. 



The variety ornata (the Eulalia ornata of De St. Joseph) has a double bar in each 

 segment in three sections, the middle touches being most distinct, as seen in the 

 figure (Plate XLIV, fig. 5) courteously given by Dr. Allen of the Marine Biological 

 Association at Plymouth. 



The Eulalia aurea of Gravier appears to be a variety closely resembling that from 

 the tangle-roots of Bressay Sound, and the figure of which (Plate XLIII, &g. 7) is also 

 given by Dr. Allen. 



The green pigment of this species has been examined by Dr. Marion Newbigin, 1 

 and it appears to be similar to that found in other Invertebrates, e. g. Chastopterus. 



Externally the proboscis (Plate LVIII, fig. 3) presents anteriorly (in situ) a massive 

 greenish portion with ribs, and posteriorly an elongated cylindrical region of a paler 

 green. The anterior massive region has a series of greenish glandular papillae on its 

 inner surface. The narrower portion succeeding is, on the other hand, lined only by 

 rounded cells, the outer layer being pale and firm. 



Two varieties in regard to the row of terminal papillae in extrusion occur, viz. one 

 with twenty-two or twenty-three papillae, the other with only fourteen. The firmness 

 of the body in those showing the latter is marked. 



The first foot, as indicated, occurs in the form of a short setigerous process with a 

 few bristles and a small ovoid ventral cirrus under the fourth tentacular cirrus. The 

 next foot is normal, though somewhat small, having a lanceolate dorsal cirrus with its 

 ceratophore, a bifid setigerous region with bristles, and a somewhat ovate ventral cirrus. 



The tenth foot (Plate LXVII, fig. 10) has a pointed lanceolate dorsal cirrus (lamella), 

 the inner edge of which is nearly straight, or has only a slight curve at apex and base, 

 whilst the outer edge has a convex curve which reaches its maximum about a third from 

 the base and then is sloped inward. The short setigerous region is bifid, with the typical 

 bristles, and the ventral cirrus is ovate with a blunt tip. 



The dorsal division of the typical foot (Plate LXVII, fig. 11) bears a lanceolate 

 cirrus with a tapering tip, the midrib being nearly median, with the pinnae stretching 

 obliquely outward and forward superiorly, and nearly at right angles posteriorly. The 

 bifid setigerous process is somewhat short and bears a series of pale bristles, the shafts 

 of which are slightly curved distally and the ends enlarged and minutely but distinctly 

 spinous (Plate LXXVII, figs. 2 and 2 a) . The terminal spear is comparatively short, rapidly 

 tapered, with rather bold serrations inferiorly, slanting outwards and upwards, that is, 

 towards the delicate tip. The serrations are more evident than those of Eumida 

 sanguined, though the terminal blade in the latter is longer. The pale spine separates 

 the two groups of bristles in each foot. The inferior cirrus is ovate and slightly 

 acuminate, and projects a little beyond the tip of the setigerous process, though in life 

 it appears scarcely to do so. These lamellae vary a little in acuteness in specimens from 

 different localities. 



Reproduction.— -Many ripe males and females are found in July. The females are 



i c 



Quart. Journ. Micr. So./ n.s., vol. xli, p. 427. 



