70 MALACOZOA. GASTEROPODA. NUDIDRANCHIATA. 



1. ^^oJis papiUosa. — Body oblong, tapering to an ob- 

 tuse point ; the sides of the back with numerous subu- 

 late branchial filaments ; the colour dusky, tinged with 

 purple, the branchiae brownish-black. PapillosuSj with 

 small soft prominences. 



2. JEolis Murray ana. — Body oblong, tapering to an 

 obtuse point ; the sides of the back wdth numerous very 

 large oblongo-conical, round branchial papillae ; the co- 

 lour bluish- white, the papillae bluish-grey. Named after 

 Mr. Alexander Murray. 



3. ^^olis Cuvicrii. — Body slender, tapering to a fine 

 point ; the sides of the back with elongated, tapering, 

 obtuse papillee in transverse series ; upper parts pale 

 purplish-grey, the branchiae pink. Named after the illus- 

 trious Cuvier. 



4. JEoNs Leslidna. — Body slender, tapering to a 

 bidentate point ; the sides with upwards of three hun- 

 dred lanceolate oblong whitish compressed papillae, in 

 obhque series ; the bare dorsal space linear-lanceolate, 

 white, with a brown oval central prominence. Named 

 after Mr. James Leslie. 



Family II. — Tritoniina. 



Body oval or oblong, with branchiae in the form of 

 tufts or plumes arranged symmetrically on the sides of 

 the body above; a pair of tentacula retractile into a 

 kind of sunk sheath. Named from the Genus Tritonia. 



Genus 1. Tritonia. — Body oval or oblong, convex 

 above, with a row of branchial tufts on each side ; the 

 mouth with two thin-edged laminar teeth. Named after 

 Triton. 



i . Tritdnia arhorcscens. — Body oblong, convex above, 

 smooth, with four feathery appendages on the margin of 

 the superoral veil, the branchiae in six distinct decom- 

 posed tufts on each side ; the colour above dusky, the 

 Ijranchiae darker. Arbor hceiis, with tree-like tufts. 



2. Tritonia pleheia. — Body oblong, tapering to an 

 obtuse point, convex above, greyish-yellow, with seven 

 prominent papiUte on the veil, and on each side six small 



