70 MALACOZOA. GASTEROPODA. NUDIBRANCHIATA, 



1. JEolis papillosa. 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. Papillosus, with 

 small soft prominences. 



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

 obtuse point ; the sides of the back with numerous very 

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

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

 Mr. Alexander Murray. 



3. jflSolis Cuvierii. Body slender, tapering to a fine 

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

 obtuse papillae in transverse series ; upper parts pale 

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

 trious Cuvier. 



4. JEolis Leslidna. Body slender, tapering to a 

 bidentate point ; the sides with upwards of three hun- 

 dred lanceolate oblong whitish compressed papillae, in 

 oblique series ; the bare dorsal space linear-lanceolate, 

 white, with a brown oval central prominence. Named 

 after Mr. James Leslie. 



FAMILY II. TRITON JINA. 



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. 



1 . TrMnia arborescens. 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 

 branchiae darker. Arborescens, with tree-like tufts. 



2. Tritonia plebeia. Body oblong, tapering to an 

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

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



