BRITISH NUDIBRANCHIATE MOLLUSCA. 47 



3. T. plebeia, Johns. Marbled with brown and yellowish above, sub quadrate ; veil entire, with 8 



points ; branchiae small, bipinnate, 5 or 6 on each side. Length 1 inch. PL 3. 



4. T. lineata, A. and H. Transparent white, very slender, with a line of opaque white down each 



side of the back ; veil with 4 linear processes ; branchiae small, pinnate, 5 on each side. 

 Length § inch. PL 4. 



Genus 9 bis. SCYLLiEA, Linn^ius. 



Body compressed, with large lobes on each side of the back, bearing the branchiae in 

 small tufts on their inner surface. Tentacles 2, laminated, with large sheaths. Fam. 2, PI. 5. 

 Tongue broad, with numerous lateral spines and a central spine, all denticulated. Corneous 

 jaws. 



1. S. pelagica, Linn. Cream-coloured, transparent, with 2 large branchial lobes on each side of the 

 back, and a posterior dorsal crest; tentacular sheaths trumpet-shaped, frilled posteriorly. 

 Length \\ inch. Appendix (17),p.vi. 



Fam. 3. EoLIDIDiE. Branchiae papillose or fusiform, rarely ramose, set along the sides of the 

 back. Liver diffused. Skin without spicula. 



Sub- Fam. DendronotinjE. Tentacles 2, laminated, retractile within sheaths. Branchiae 

 branched or papillose. Veil with processes. Anus lateral. 



Genus 10. LOMANOTUS, Verany. 



Body subquadrilateral. Branchiae papillose or foliaceous, arranged in a nearly continuous 

 line on a pallial ridge on the sides of the back. Tentacles 2, with tight sheaths. {Eumenis, 

 A. and H., included in PI. 5 of Fam. 2.) Appendix (18), p. vii. 



Tongue broad, with numerous denticulated spines : no central spine. Corneous jaws. 



1. L. marmoratus, A. and H. Olivaceous, marbled with brown and white ; tentacles with smooth sheaths ; 



branchiae forming a nearly continuous waved line of papillae on each side of the back. 

 Length | inch. Fam. 3, PL la (Eumenis marmorata). 



2. L.flavidus, A. and H. Pale lemon-yellow; tentacles with tuberculated sheaths ; branchiae papillose, 



mostly short, with a few longer ones at regular intervals, all ringed with fawn-colour. 

 Length \ inch. PI. 41, figs. 6, 7. 



Genus 11. DENDRONOTUS, Alder and Hancock. 



Body compressed, without cloak. Branchiae ramose, set in single series on each side of 

 the back. Tentacles with branched sheaths. Veil branched. Fam. 3, PI. 2. 



Tongue rather narrow, with numerous lateral spines, and a large central spine, all denticulated. 

 Corneous jaws. 



1. D. arborescens, Mull. Reddish, marbled with brown; veil much branched; branchiae 6 or 7 on 

 each side. Length 1 to 2 inches. PL 3, 



