MOI.LUSCA OF PLYMOUTH. 437 



28. ^Galvina teicoloRj Forbes (= Gavolina Farrani of 1st Rep., 



p. 193). 



EoLis TEICOLOE, Forbes. Aid. and Hanc, Monograph, Fam. 3, pi. xxxiv. 



— Farkani, Alder and Hancock. Monograph, Fam. 3, pi. xxxv. 



— Adelaide, Thompson. Ann. and Mag. Nat. Hist. (3), vol. v, 1860, p. 49. 



— — Mcintosh. Mar. Inv. and Fish, St. Andrews, p. 86, pi. ii, fig. 11. 



— Akdeeapolis, idem. Proc. Roy. Soc, Edin., 1864-5. 



— RoBEETiAN^, idem. Do. do. 



— Faeeani, idem. The Marine Invertebrates and Fishes of St. Andrews, 



1875, pi. ii, figs. 12, 13. 



— TEICOLOE, Forbes. Friele og Hansen. Bidr. til Kundsk. om de NorsJce 



Nudibranchier, Vidensk. Selsk. Forhandl., 1875. 



I have followed Friele and Hansen in uniting G. Farrani with 

 G. fricolor. 



Thi'ee individuals were found feeding upon Ohelia geniculata, 

 growing on Laminaria, on September 30th, 1889, measuring from 

 f to I inch in length. One was quite white in colour, except for a 

 faint tinge of fawn-colour in the cerata (due to the hepatic caeca), 

 another was entirely orange- coloured, and in the third specimen the 

 body was white, with deep orange-yellow patches on the back and 

 on the front and sides of the head ; the larger cerata near the 

 median line were orange-coloured with a few markings of purplish 

 umber, and the rest were of a much paler yellowish colour. All the 

 cerata had white tips, bounded below by a narrow purplish ring, 

 merging below into a ring of orange. 



On October 2nd two more specimens were obtained under similar 

 conditions, one being ^, the other y^g- inch long. The former was 

 exactly like the first specimen here described, while the latter was 

 white, with orange-tipped cerata and tentacles, the orange pigment 

 being also traceable on the back as well as over the surface of the 

 cerata. 



Three days later four more individuals were found upon Lami' 

 naria saccharina dredged in the Cattewater, the weed having no 

 Ohelia growing upon it, but quantities of slender branching algae and 

 of a calcareous Polyzoan. They were from i^ to -| inch long. In 

 one individual the back was of a semi-transparent white, with 

 patches of deep orange-red and a certain amount of reticulating 

 purplish pigment. There was a broad patch of deep purple on the 

 front of the head, while in front and at the sides of the rhinophores 

 there were patches of deep orange-red. The oral tentacles and tip 

 of the '' tail " were orange-coloured. The cerata were of a violet 

 colour, faint below, with conspicuous orange tips. Two other indi- 

 viduals were white with fawn-coloured cerata, spotted profusely with 

 microscopic opaque white spots, and having white tips. One had 



