80 
Proceedings of the Royal Society 
Boltenia elegans, n. sp. 
External appearance. — Shape of body quadrangular ovate, not 
flattened ; anterior and posterior ends bluntly rounded, dorsal and 
ventral edges nearly straight. Peduncle long and thin, wiry, 
attached to the ventral edge of the anterior end, and turned slightly 
ventrally. Apertures conspicuous, branchial at the dorsal edge of 
the anterior end, directed anteriorly and dorsally ^ atrial on the 
dorsal edge, two-thirds of the way down, directed dorsally and 
posteriorly ; behind the atrial aperture the dorsal edge sinks in 
somewhat towards the posterior end. Surface smooth and glisten- 
ing, marked by a few creases. Colour of the body white, with 
a satiny lustre ; stalk light yellowish-brown. Length of body, 
5*5 cm. ; breadth of body, 4 cm. Length of stalk, 36 cm. : thick- 
ness of stalk, 2 mm. 
Test thin but tough. 
Mantle strong, musculature regular. 
Branchial sac with nine folds on each side, those next the endo 
style being closer than the dorsal ones. Transverse vessels wide 
and distant. Stigmata transverse, running between narrow longi- 
tudinal bars which connect the transverse vessels. Internal longi- 
tudinal bars narrow but well marked, running at right angles to 
the transverse stigmata. Stigmata rather long and narrow, about 
fifteen in each mesh. 
Dorsal lamina represented by a series of closely-placed, large, 
tapering languets. 
Tentacles large, branched, sixteen in number, placed long and 
short alternately. 
Olfactory tubercle large and distinct, elongated transversely but 
directed vertically, the opening being on the right side ; both horns 
coiled inwards. 
Two specimens from Station 48 (south of Halifax, N.S.), 51 
fathoms. 
This species is probably nearer to Savigny’s Boltenia ovifera 
than to any other known species, but differs from it in many par- 
ticulars. 
