PLEUROBRANCHUS. 205 



paler than above. Shell on the anterior hall' of the body, concealed, 

 small, fragile, pellucid, oblong ovate, convex and ornamented with 

 wrinkles of growth. Nucleus posterior, more or less brownish. 



cp*.). 



Sandwich 7*. (Pse.) 

 P. varians PSE., P. Z. S., 1860, p. 25, No. 20. 



(Australo- Zealand ic Species.'} 

 P. PUNCTATUS Quoy & Gaimard. PL 45, figs. 2, 3, 4, 5, 6. 



Body elongated ordinarily flat above, rounded at the two ends, 

 wider behind. Mantle covering the foot to the edges, but the foot 

 projects behind. Entire body smooth, of a beautiful orange, with 

 two lateral series of white dots above ; tentacles and produced angles 

 of veil have a deeper orange longitudinal line ; foot with a groove 

 of lighter tint in front. The viscera are visible through the integu- 

 ment both above and below, as a brown spot. Veil wide, arcuate, 

 terminating in two obtuse points ; tentacles proportionally very long. 

 Length 1 to 2 inches. The figures represent it in various positions. 



Port Jervis, Australia, 9-10 fms. 



Pleurobranchm punctatus QUOY & GAIMARD, Zool. Astrolabe, ii, 

 p. 299, pi. 22, f. 15-19 (1832). 



P. ANGASI Smith. PI. 46, figs. 12, 13. 



Animal (in spirit) uniformly pale buff, elongate ovate. Mantle 

 probably smooth in life, wrinkled by contraction, not very widely 

 produced at the free margin. Foot broad, tapering behind, roundly 

 subtruncate in front, where there is a thickening forming a double 

 margin beneath the proboscis. The frontal veil is straight in front, 

 angular at the sides, which are grooved. Tentacles shortish, slit at 

 the outer side, with the minute eye-specks at their base behind. 

 Branchial plume consisting of about sixteen leaflets. Penis spine- 

 like, very acute, and slightly curved at the tip. 



Shell placed well forward, the pale apex being posterior. It is 

 brown in front, glossy, and beautifully iridescent on the exterior. 

 It consists of about a whorl and a half, the nucleus being spiral and 

 hollow within. The last whorl is much prolonged by additional 

 strongly defined concentric layers, and also ornamented with fine, 

 yet distinct transverse striae. The columella is arcuate, and has an 

 umbilical groove parallel with it. 



Length of animal 17 mill., diam. 7 ; length of shell, from nucleus 

 to opposite end, 4i. (Smith). 



Port Jackson (Coppinger). 



