58 Mull. 
MOLLUSCA. 
anatomical description of 0. elegans (Cantr.) = schuUziana (Chiaje) and 
of villafranca (Risso) = tenera (Oosta) given by R. Bergh, Mai. Bl. xxvr. 
1878, pp. 1-36, pis. i. & ii. 
Lamellidoris (Aid. & Hanc.). Generic characters discussed ; 17 known 
species enumerated ; L. hilamellata (Linn.), with var. litiirata (Beck), 
anatomically described; varians and hystricina, spp. nn., Kyska, Pacific, 
and muricata (Miill.). Bergh, 1. c. pp. 603-615, pi. Ixiv. figs. 12-19, pi. Ixv. 
figs. 1-13, & pi. Ixviii. figs. 15-23. 
Lamellidoris hilamellata (Miill.) = liturata (Moller), muricata (Miill.), 
smdiproxima (Aid. & Hanc.); Sars, Moll. arct. Nor /eg. pp. 306-308; 
radula of the two former, pi. xiii. figs. 5 & 6 ; of L. loveni (Aid. & Hanc.) 
pi. xiv. fig. 1. 
Acanihodoris pilosa (Miill.); Sars, 1. c. p. 308; radula, pi. xiv. 
fig. 4. 
Doridunculus^ g. n. Mantle short, broad, with elongate spicula ; two 
longitudinal ridges on its back ; gills not retractile. D. echinulatus, sp. n., 
Lofoden Islands, 100 fath., Sars, 1. c. p. 309, pi. xxvii. fig. 2 ; radula, 
pi. xiv. fig. 5. 
Onchidoris luteo cincta (Sars) and pusilla (Aid. & Hanc.), radula ; id. 
I, c. pi. xiv. figs. 2 & 3. 
Lophodoris danielsseni (P. & H.) ; id. 1. c. pi. xiv. fig. 7. 
POLYCERIDJ]. 
Goniodoris nodosa (Mont.), radula ; Sars, 1. c. pi. xiv. fig. 5. 
Triopa lacer (Miill.) ; id. 1. c. p. 311, pi. xxvii. fig. 4; radula, pi. xiv. 
fig. 12, of claviger (Miill.), fig. 13. 
Triopelltty g. n. Distinct from Triopa by the broad mantle, which is 
bilobated behind, and has two longitudinal ridges on the back ; radula 
like that of AEgirus. Type, T. incisa (M. Sars, as Triopa). Sars, 1. c. 
p. 310, pi. xxvii. fig. 3 ; radula, pi. xiv. fig 9, Lofoden Islands, 120-200 
fath. 
Thecacera virescens (Aid. & Hanc ), radula ; id. 1. c. pi. xiv. fig. 17. 
Plocamophorus levivarius^ sp. n., locality unknown, and list of known 
species (10); Abraham, Bull. Soc. Z. Fr. i. [1876], pp. 287-290, with wood- 
cut. 
xEgirus punctilucens (Lov.), radula; Sars, 1. c. pi. xiv. fig. 10. 
Polycera cornuta (Abildg.), lessoni (Orb.), and ocellata (Aid. & Hanc.), 
radula ; id. 1. c. pi. xiv. figs. 14-16. 
Idalia pulchella (Aid. & Hanc.), radula ; id. 1. c. pi. xiv. fig. 8. 
Tritoniidjj. 
Tritonia pleheia (Johnst.), radula; Sars, 1. c. pi. xv. fig. 1. 
Dendronotid^e. 
Dendronotiis velifei\ sp. n., Sars, I c. p. 315, pi. xxviii. fig. 2; radula, 
pi. XV. fig. 4, Vad.sc, 60-100 fath. 
