. The Annals of Scottish natural history. Natural history; Natural history -- Scotland. NOTES ON NUDIBRANCHIATE MOLLUSCS 229 The latter have a tendency to develop into epipodial flaps like those of Ancula, and at the same time there appears a tendency to have the normal trace of an epipodial ridge very marked (see Herdman, "Fauna of Liverpool Bay," Report III. p. 133). The extent to which these variations may occur can be seen in the following descrip- tion of a specimen dredged in about 20 fathoms near the Farland Pt. during Oct. 1906 (see fig.) :— Length 18 mm., a rather pale - col
. The Annals of Scottish natural history. Natural history; Natural history -- Scotland. NOTES ON NUDIBRANCHIATE MOLLUSCS 229 The latter have a tendency to develop into epipodial flaps like those of Ancula, and at the same time there appears a tendency to have the normal trace of an epipodial ridge very marked (see Herdman, "Fauna of Liverpool Bay," Report III. p. 133). The extent to which these variations may occur can be seen in the following descrip- tion of a specimen dredged in about 20 fathoms near the Farland Pt. during Oct. 1906 (see fig.) :— Length 18 mm., a rather pale - coloured specimen. Velar processes 3 on right side, followed by a very small one which was hardly more than a tubercle, then 2 long ones, i short one and 5 long ones and a tubercle on the left; 10 well-developed, slightly contractile, yellow-tipped pro- cesses of normal size, and 3 uncoloured small ones (see Garstang, "Journal ," vol. i. new series, p. 455). Rhinophores short and thick with a few closely set laminae, yellow tipped. Branchice 7 small, tipped with yellow among which was a little black pigment. Cerata large, palmate, consisting of 5 or 6 yellow-tipped lobes. Coloured tubercles absent, except the median dorsal row posterior to the branchiae. Eyes very indistinct; the left anterior angle of the foot coloured yellow, the right being white. This specimen, which was healthy and active, lived and spawned in captivity for nearly two months; the spawn was destroyed by Infusorians. Two days later we dredged three more specimens of P. quadrillneata in the same locality. The first was quite a normal. P. QUADRILINEATA, SHOWING VARIA- TION IN THE CERATA AND VELAR Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Edinburgh : David Douglas
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