178 
MOLLUSCA. 
spp. nn., anatomically described : Bergh, 1. c. pp. 362-376, pi. xlv. 
fig. 27, pi. xlvi. figs. 23-28, pi. xlvii. figs. 4-28, and pi. xlviii. figs. 1-14. 
Head unusually large by the strong development of that part which is 
called “ prohistion ” by Morch, upper tentacula or rhinophoria retractile, 
perfoliate, pharynx with a strongly toothed jaw, but without radula ; 
back with unequal leaf-, tree-, and club-shaped papillae ; no distinct gills. 
.^Eolidid^. 
The cerebral ganglion of jEolidia^ Coryphella^ Facelina, Bparilla, and 
Janus, is the object of a paper by S. Trinchese in Rend. Acc. Bologn. 
Febr. 1875 ; a very large cell, called polar cell by the author, is found 
in the anterior part of it, surrounded by many small cells; the same 
structure is found in the buccal ganglions. 
l^olidia} Eolis adelaidce (Thomps.), and farrani (A. & H.), purple 
variety; Macintosh, Mar. Invertebr. of St. Andrews, pi. ii. figs. 11, 
12, & 13. ' . 
^olidia (Ouv.) = JEolidiana (Quatref.), limited to M. papillosa (L.), 
from the Northern Seas of Europe, and serotina (Bergh), from the 
Pacific ; Bergh, Verb. z.-b. Wien, xxiv. pp. 395 & 396. 
Molidhlla (Bergh, 1867) occidentalis, sp. n., id. 1. c. p. 397, pi. viii. 
figs. 9-19, Caribbean Sea. _ . 
Facelina drummondi (Thomps.), veranyana, sp. n., janii (Terany), 
and panizzm (Verany), described ; id. 1. c. pp. 400-409, pi. ix. figs. 2-17, 
pi. X. figs. 1-13, pi. xi. figs. 1 & 4-11, the first from Jutland, the others 
from the Mediterranean. 
Coryphella (Gray) . Rhinophoria simplicia ; mandibula denticulata ; 
radula dentibus triseriatis. C. athadona, sp. n., Japan, and argenteo- 
lineata (Costa), Mediterranean, fully described, and 17 other species be- 
longing to this genus enumerated ; id. op. cit. xxv. pp. 633-640, pi. xiii. 
figs. 1-13, pi. XV. fig. 20, and pi. xyi. figs. 1-3. 
Coryphella rohusta, sp. n., Trinchese, Rend. Acc. Bologn., Febr. 1875, 
Mediterranean. 
Favorinus (Gray). !p,hinophoria infra apicem bulbo praedita ; man- 
dibula acute denticulata ; radula uniseriata. F. albus (A. & H.) = ? 
Matharena Qxyacantha (Bergh, 1871), and F. ^;ers^co?or (Costa), Medi- 
terranean, the latter described; Bergh, Verb. z.-h. Wien, xxv. p. 641, 
pi. xiv. figs. 2 «& 3, and pi. xv. figs. 2-5. 
Catma (Aid. & Hanc.). Rhinophoria simplicia ; papillae dorsales non 
caducae, pedamentis brachiiformibus insertae ; mandibula acute denticu- 
lata ; radula triseriata, dentibus lateraJibus laevibus ; penis stylo 
armatus. C. cavolinii (Verany, 1840) =.digitata (Costa, 1866), described. 
Id. 1. c. p. 644, pi. xiv. figs. 4-21, and pi. xv. fig. 1, Mediterranean. 
Flahellina (Cuv.). Rhinophoria perfoliata; papillae non caducae, 
pedamentis brachiiformibus insertae ; mandibula triseriata, dentibus 
lateralibus denticulatis ; penis stylo armatus. F. affinis (Gmel.), Medi- 
terranean, described, and five other species from the Mediterranean and 
Pacific enumerated ; id. 1. c. pp. 647-651, pi. xv. figs. 6-19, pi. xvi. 
figs. 3 & 4. , 
