68 EUMIDA SANGUINEA. 



mobile. It is rounded dorsally, flattened ventrally, somewhat narrowed in front, and 

 tapered posteriorly, where it terminates in two fusiform or subulate cirri. In colour it is 

 light greenish brown, or straw-colour, occasionally almost translucent anteriorly, with a 

 faint, straw-coloured, or yellowish line along the centre, greenish white, or pale brownish, 

 with a dusting of brownish grains. The posterior region is more opaque. The first 

 segment is marked by a pure white bar, or by white grains, and in many a narrow white 

 or yellowish bar occurs at each segment-junction. In one from St. Peter Port, 

 Guernsey, the body was of a fine light purple or mauve hue, with a white silvery bar 

 across each segment and whitish specks between the eyes. Some are pale greenish 

 brown, faintly marked by transverse lines on the dorsum and by a dull yellowish or 

 brownish line in the centre from the intestine, while a variety is very prettily banded with 

 dark green in a large bar anteriorly in each segment and a smaller behind, the effect 

 being heightened by the pallor of the lamellae and the tentacles. The ventral surface is 

 pale or marked by the salmon-tint of the viscera. 



In section the oblique muscles pass below the nerve-cords on each side, and meet 

 at their insertion in the middle line. The arrangement of the dorsal and ventral 

 longitudinal muscles is typical. 



Proboscis (Plate LVIII, fig. 22) long, transversely rugose behind the tip, which has 

 twenty papillae. 



It is seldom that the organ is everted by the mouth in the preparations. It is 

 generally detached anteriorly and thrust out by a rupture of the body-wall. 



The coelomic fluid is mixed with many large flattened cells (August) measuring fully 

 5~Jq of an inch in their longer diameter, while the ordinary corpuscles are less than -^too 

 of an inch. 



The wall of the alimentary canal is richly glandular. 



Dr. Allen forwarded a drawing of a form from Plymouth, which he termed Eulalia 

 sp. B, of a pale greenish hue anteriorly, slightly pinkish posteriorly, the general aspect 

 agreeing with that of Eumida, the white bar behind the head being conspicuous. In the 

 coloured drawing, however, the median tentacle is considerably longer than the anterior 

 or paired tentacles — a feature less marked in the preserved form with the proboscis 

 extruded. The shape of the foot and the general aspect of the proboscis appear to agree 

 with Eumida sanguined, of which this appears to be a fairly characteristic example. 



In the typical foot (Plate LXVII, figs. 14a — tenth, and 15 — sixtieth) the dorsal cirri 

 are borne subvertically, and are broadly ovate with an acuminate tip, while the base is sub- 

 cordate, and the hypodermic granules are arranged in very regular and close streaks, so 

 that the appearance is characteristic. The streaks proceed from a central region more 

 opaque and areolar than the marginal. The papilla bearing the process is elevated, 

 so that the space between the lamella and the spinigerous lobe is marked. The 

 spinigerous process is comparatively long, and bifid, and the inferior broadly lanceolate 

 cirrus arises from a distinct shoulder inferiorly and posteriorly. Its tip is also somewhat 

 acuminate, and does not quite reach that of the spinigerous region, and therefore is 

 proportionally shorter than at the tenth foot. When seen antero-posteriorly a single 

 large median spine occupies the centre, and a series of smaller spines trend off on each 

 side. The translucent bristles have a distinct shoulder and a spinigerous bevelled tip 



