1877.] ANTHOBRANCHIATE NUDIBRANCHIATE MOLLUSCA. 267 
Dortpopsis VARIATA, sp. nov. (Plate XXIX. figs. 23, 24.) 
Body oblong, raised, soft. Mantle extending down over the foot, 
but having very little of the border free ; in front and at the back the 
latter is somewhat lobate; the surface is very indistinctly rugose. 
Rhinophores long, slender, linear, pointed, laminated far down, and 
laterally compressed ; their cavities with marginated edges. Branchize 
5, very long, slender, tripinnate, diminishing in size from the front 
one ; the tubular anus is independently retractile a little in front of 
the interval between the two hinder plumes; the general cavity has 
a quinqui-sublobate edge. Foot oblong, rounded in front, abruptly 
acuminate behind, and then extending, like a flat oblong tail, 
beyond the posterior mantle-border. Above the opening for the pro- 
boscis in the anterior margin are two short, rounded, lateral ten- 
tacular appendages. 
Colour of the spirit specimen greyish white, variegated with 
scattered, dark bluish grey, unequal blotches or spots borne on in- 
distinct flat pustular surfaces ; the larger ones are arranged longi- 
tudinally with some regularity ; on the back moreover is a row of 
three irregular lozenge-shaped or angular outlines ; and along each 
side is a row of 4or 5 similar but larger and more distinct markings. 
Length (in spirit) 20 millims., breadth 9, height 8. 
Hab. China (Ningpo). 
Doripopsis PARVA, sp. nov. (Plate XXX. figs. 27, 28.) 
Body elliptic, convex, raised at the sides. Mantle soft, smooth, 
with a very short, free, wavy border ; there is a broad interval at the 
sides between the mantle and the foot. Rhinophores small, clavate, 
rounded and laminated above; the orifices of their cavities rather 
protrudent and contractile, placed near together and far forwards. 
Branchiz small, apparently bipinnate, and above 7 in number, the 
two hindermost rather larger and trifid; the margin of their common 
cavity closes over them. The foot is broad, truncated in front, 
gradually narrowing, and becoming rounded behind: very little of 
it is free. 
Colour of the spirit specimen semitransparent white, with the 
border, the branchiz, the rhinophores, and the foot more opaque. 
Length (in spirit) 9 millims., breadth 7, height 6. 
Hab. ? 

In conclusion, I wish to record my thanks to Dr. Giinther, F.R.S. 
&c., who has given me facilities for studying these animals, and 
who has kindly allowed me to make an abstract, in this paper, of the 
Descriptive Catalogue which I have been preparing for the Natural- 
History Department of the British Museum. 
