eS eT eee 
? 
35 
back, and on the head and upper tentacles. Upper tentacles obso- 
letely annulated with pale fawn, and a vermilion dot at their anterior 
base. Head and front tentacles slightly varied with red. Branchial 
tufts freckled with opaque white, lineated with blackish dotted with 
fawn, and with an azure reflexion. 
Length 1 inch. 
When placed in a basin of water this olis suspends itself, back 
downwards. 
47. MOLIs PARVULA. 
Body smooth, subpellucid, tapering to a point posteriorly. Six 
pair of branchial tufts arranged longitudinally, the last on the poste- 
rior point of the body. Foot furnished anteriorly with lateral auri- 
cular appendages. Tentacles elongate-oval. Labial appendages 
elongato-subulate. Head and body subpellucid, uncoloured, freckled 
with vermilion. Branchial tufts olive, freckled with dusky. 
Length 5 lines. 
48. EvysIA OCELLATA. 
Oblong, smooth, wider anteriorly. Body with a wide expansion 
on both sides, which, when open and expanded (in their natural po- 
sition), are truncated posteriorly and rounded anteriorly ; the surface 
longitudinally and obliquely plaited; when disturbed they roll to- 
gether, so that their edges are parallel and medial, forming a cavern- 
ous chamber. Beneath and near the anterior end of the cloak is a 
papillary orifice. Head rather large, broad, concave between the 
tentacles, convex in profile, and furnished beneath with a large veil, 
dilated laterally and emarginated in front. Tentacles two, inserted 
at the anterior angles of the head, non-retractile, stout, cylindrically 
tapering to a blunt point, and grooved laterally in front. Eyes sessile, — 
on a prominence on top of the head between the tentacles. Colour 
above, when the expansion is closed, cream-colour, and everywhere 
crowded with irregular-sized ocellations, some of which are bright 
fawn with white rings, others green with fawn rings, and the largest 
and most conspicuous bluish-green centres with black rings, out- 
side of which are white ones. The surface of the expansion is 
palish, the plaits deep green, and the posterior margin violet. Ten- 
tacles deep yellowish-fawn, tipped with white, beneath which they 
are annulated with violet, and have the grooved edges of the same 
colour. Foot pale ash and crowded with ocellations, pale fawn cen- 
tres and white rings. 
Length 1} inch. 
This is a very active and hardy animal. 
Genus PTEROGASTERON. 
Depressed, thin, with lateral wing-like expansions, which in their 
natural position are turned vertically upwards; margins strongly un- 
dulated. Neck rather long. Head rounded above, truncated in 
front. Mouth underneath. Upper lip bilobed. Tentacles two, ear- 
