EUMIDA SANGUINEA. 69 



in lateral view (Plate LXXVII, fig. 5), in which position the very slight curvature of 

 the tip of the shaft is visible. The terminal blade is longer than in the ordinary 

 examples of Eulalia, tapers to a fine tip, and is minutely serrated along the edge. 



Coiled vessels occur at the base of the dorsal cirrus, but none have been traced into 

 it. Cilia seemed to be arranged along the basal part of the foot. 



Reproduction. — Ripe ova occur towards the end of May, and it is probable that the 

 breeding period extends to August. Ripe males came from four fathoms in Valencia 

 Harbour on May loth, 1870 (J. Gr. J.), and from Lochmaddy in August. A ripe 

 female occurred in August under the spreading crust of Gorallina officinalis at Herm. 

 Beyond the enlargement of the body no change of external appearance takes place in this 

 condition, but in section the whole coelomic space and the cavities of the feet in the males 

 are distended with sperms, and the wall of the gut appears to be thinner. In the females 

 the early ova occur in masses in the feet. Allen observes that at Plymouth it (his 

 Eulalia pallida, and also his greenish Eulalia B, with white bar) breeds from May to 

 July, and that the eggs are green. 



Young examples of about sixteen segments were procured in the bottom tow-net 

 on June 16th, and others of seventeen bristled segments on October 22nd. A white 

 band occurs behind the head, the rest of the body being of a pale straw-colour. Eyes 

 comparatively large, black. Some of the young forms at a later stage, from deep water, 

 are of a madder-brown colour. 



Habits. — The body is very mobile, constrictions taking place at various points 

 (Plate XLIII, fig. 9) and again disappearing. It is an active and restless species, moving 

 backward and forward, or in confinement swimming with considerable speed in a 

 serpentine manner at the surface or through the water of a vessel, and evading capture 

 with adroitness. A vermicular contraction and dilatation often occur posteriorly — as if 

 water entered the rectum. The vitality of fragments, e. g. the posterior end, is great. 



It is difficult to say whether the Nereis ellipsis of Dalyell 1 is this form or a Eulalia. 



The Eulalia punctifera, Grube, 2 from Cherso in the Adriatic, approaches this form 

 very closely. 



De Quatrefages 3 (1843) described and figured a Phyllodoce saxicola which had five 

 tentacles, and which accordingly in the 6 Anneles ' was termed Eulalia saxicola — a form 

 which appears to be one of the varieties of Eumida sanguinea. 



It is doubtful if such species as Claparede's Eulalia (Eumida) pallida 4 merit specific 

 distinction. The form mentioned would appear to be a variety. His Eulalia (Eumida) 

 guttata ° also is a closely allied form. Eumida sanguinea is variable in colour, and the 

 pale examples from Plymouth (=Eulalia pallida, Allen) differ in no material way from 

 the type (which is absent from the list of the local annelids). De St. Joseph found a 

 female parasitic copepod on this form at Dinard. 



1 < Pow. Creat./ ii, p. 152, pi. xx, figs. 7—10, 1853. 

 3 ' Archiv f. Naturges./ 1860, p. 83. 



3 f Magasin de Zoologie/ 1843, p. 1 (sep. copy), pi. i, figs. 1 — 6. 



4 ' Annel. Nap./ p. 246, pi. xvi, fig. 6, 1868. 



5 Ibid., SuppL, p. 97, pi. ix, fig. 2. 



