210 Mr. N. Colgan — Contributions towards a 



1877. — Rev. A. M. Norman describes, in the Ann. & Mag. 

 Nat. Hist. (ser. 4, vol. xx. p. 518), a fourth British species, 

 which he names L. hancoeki. The description is drawn up 

 from a single specimen 2\ inches long, dredged off Berry 

 Head, Torbaj, in 1875. In colour the animal is of a light 

 pinkish orange and very transparent, so that the internal 

 organs show clearly through the skin ; the rhinophores are 

 quite destitute of lamina? and so short as scarcely to exceed 

 the sheaths, which latter terminate above in a calyx-shaped 

 expansion formed of five leaf-like points. It seems clear that 

 this description of the rhinophores was drawn up at a time 

 when they were fully retracted, their smooth tips alone being 

 visible above the sheath-margins. It is admitted that the 

 rhinophores were not dissected out in this case *. 



1878 and 1883.— Dr. Rudolph Bergh, of Copenhagen, 

 makes an important contribution to our knowledge of the 

 genus in his well-known " Beitrage zur Kentniss der Aeoli- 

 diaden " (Verhandl. der zool.-botan. Gesellschaft in VVien, 

 1878, p. 553, and 1883, p. 66), in which he gives an ex- 

 haustive description with anatomical plates of L. genei, 

 founded on an examination of two specimens, one 1^- inch 

 long dredged in the Bay of Naples and preserved in spirit, 

 the other a living specimen H inch long dredged in the 

 Adriatic near Trieste. In so far as they deal with obvious 

 features, both Verany^s (1846) and Bergh's descriptions agree 

 closely, the only differences being as to colour and degree of 

 opacity dependent on colour. While the wine-red of V^rany's 

 animal allowed the dark red viscera to appear through the 

 body, the purple of Bergh's concealed them ("Die Eingeweide 

 schimmerten nirgends hindurch"). 



1883. — At the meeting of the Academy of Physical and 

 Mathematical Sciences of Naples held on the 10th March 

 Signore S. Trinchese reads a paper entitled " Di una nuova 

 forma del genere Lomanotus e del suo sviluppo." This paper, 

 which does not appear to have received, at least in the 

 British Isles, the consideration it merits, is published in the 

 'Kendiconti' of the Academy for 1883 (Anno xxii. pp. 92- 

 94), and gives not only a full description of the new Loma- 

 notus from a mature specimen, but also a most valuable 

 account of the development to maturity of a young individual 

 measuring scarcely -[^ inch (2 mm.). Both specimens were 



* See Garstan 

 Journ. of 



jrarstang's " Nudibranchiate Mollusca of Plymouth Sound," 

 Marine Biol. Assoc, of United Kingdom, vol. i. 



