229, SCIENTIFIC RESULTS OF THE 
and by me ought to be catled by that name. To the same is without 
doubt to be referred the second variety ( 8) of the D. muricata 
(Miiller, Sars) of Lovén (the first being the D. Lovéni of Alder). 
Of this form, and under that name, I have had two well conserved 
specimens for examination, kindly sent me by Mr. Friele, of Bergen, 
and caught in the neighborhood of that place. 
The individuals (preserved in spirits) were of light yellowish color.! 
The length 9-10 mm. by a breadth of 5-6.0 and a height of nearly 
3.0 mm.: the breadth of the foot reaching 3.5 mm.; the height of the 
rhinophoria 1.5, of the branchial leaves 1.0mm. ‘The form of the 
animal as usual; the warts of the back not large, mostly truncate, 
clavate. The openings for the rhinophoria as usual, with two tubercles 
before them, or one on each side; the club with about fifteen to twenty 
leaves.2. The branchial leaves about twelve to fourteen, as far as could 
be determined ;3 the space inclosed by the gill covered with the usual 
tubercles ; the anus presenting the ordinary features. The head rather 
large, the side parts adhering to the foot throughout their whole length. 
The genital groove with three openings; a foremost round, a median 
spalt-formed, and a posterior large and round. 
Both individuals were dissected ; the peritoneum was colorless. 
In the central nervous system the cerebro-visceral ganglia appeared 
rather short, reniform; the pedal ones of roundish form, somewhat 
larger than either of the former; the commissures rather short. The 
olfactory ganglion short-stalked, nearly spherical, situated rather 
posteriorly on the upper side of the cerebral ganglia, and nearly as 
large as the buccal ones. The buccal ganglia of oval outline, con- 
nected by a short commissure ; the gastro-cesophageal nearly spherical, 
in size about one-quarter of the former, short-stalked: a secondary 
ganglion lying above the last on the cesophagus. 
The eyes not short-stalked; with rich black pigment aud yellow 
lens. The otocysts a little smaller than the eyes, filled with otokonia 
of the common kind. In the leaves of the rhinophoria rather few but 
large spicula of the same kind as in the skin, more or less perpendicu- 
lar on the free margin; the axes of the club like the stalk still more 
richly endowed with smaller and larger spicules. Under the glass the 
' According to Lovén the color is yellowish; to Meyer and Moebius white 
or yellowish-white, the rhinophoria orange-colored. 
2 According to Meyer and Moebius the club of the rhinophoria has but 
nine or ten leaves. — 
* Meyer and Moebius mention eight leaves as nearly constant. 
