.262 Messrs. J, Alder and A. Hancock on a new Genus 



the foot orange^ grooved in front, with the upper lamina notched 

 m the centre. 



Length 1\ to 2 inches. 



A specimen of this fine Doris was got by Messrs. R. S. Brady 

 and G. Hodge, under a stone between tide-marks, on the Island 

 of Herm, in June last. It is known as a Mediterranean species, 

 but its range farther north had not been before ascertained. 



The resemblance between D. testudinaria and our D. planata 

 suggests the question whether the latter may not be the young 

 of the present species. The very depressed form, however, of 

 D. planata, its much smaller branchial plumes, their conspicuous 

 dark-brown markings, and the presence of a central plume, 

 which is not the case in D. testudinaria^ induce us to consider 

 them distinct. The character of the tongue is similar in each, 



Doris Loveni, 

 Doris muricata, Loven, Index Moll. Scand. p. 5. no. 18. 



Bodi/ ovate, rather convex, yellowish white. Cloak with very 

 large, rather distant, clavate tubercles, larger and more numerous 

 towards the sides, interspersed with smaller ones. Tentacles 

 robust, yellowish, placed considerably apart. Branchial plumes 

 eleven, pinnate, set in a small incomplete circle or ellipse. Veil 

 large, undulated. Foot broad and ample. 



Length half an inch ; breadth 0*35 inch. 



A single specimen of this species was found by the liev. A.M. 

 Norman among stones between tide-marks, on the south side of 

 Bantry Bay, in the autumn of 1858. It is remarkable for the 

 enormous size of its tubercles, which, though soft and having a 

 puffed appearance, contain each a bundle of spicula. That this 

 is the Doris muricata, a, of Professor Loven we are able to state 

 with confidence, that distinguished naturalist having kindly sent 

 us a specimen. We think, however, that the D. muricata of our 

 Monograph is probably the true D. muricata of Miiller, as the 

 tubercles come nearer in character to those represented in his 

 figure j and the former may perhaps be the var. /3 of Loven, 

 though it does not in all respects correspond with his descrip- 

 tion. The two Varieties described by Professor Loven are clearly 

 distinct species, differing not only in the size of the tubercles as 

 well as of the animal, but also in the character of the tongue, 

 which, in the present species (the typical form of Loven) has 

 numerous small lateral plates or spines, similar to those of D. 

 proximo, in addition to a large and rather slender falcate spine 

 on each side. In D. muricata, var. p. Lov., there is a very 

 broad-based falcate spine and an obtuse small one only on each 

 side, the large spine having very minute lateral denticulations. 

 There is also a rectangular central plate. 



