GASTEROPODA. 35 



146. L. (Arene) Shandi, sp. nov. Spire depressed ; whorls 

 flattened, with several monilitbrm spiral ribs, the marginal rib of the 

 body whorl larger than the others. White or pinkish white, varied 

 with brown and purplish brown ; interior white, slightly pearly. 

 Length, "3 ; breadth, - 5. 



Chatham Islands only. 



Named in honor of Mr. Shaud, of the Chatham Islands, who 

 collected many of the shells. 



ADSORBIS. 



Orbicular, depressed, umbilicated ; whorls few, smooth or striated, 

 the last more or less angular ; aperture sub-circular ; peristome inter- 

 rupted ; columeila arched. 



West Indies. China. 



147. A. varillS, S P- n v. Spirally grooved, smooth ; brown, 

 irregularly varied with darker and white ; interior purple, varied with 

 white. Length, '17 ; breadth, '3. 



Stewart's Island. Chatham Islands. 



ROTELLA. 



Orbicular, depressed, hnperforate, polished ; base convex and 

 callous ; mouth sub-rotund. 



India. China. Phillippines. 



148. R. zealandica, Chenu. Body whorl rather angled, more 

 or less sulcated along the keel. Colour variable ; generally yellowish 

 white with radiating chestnut rays ; rays often purple or pink. Some- 

 times entirely brownish pink with an iridescent play of colours. 

 Columella white, with a circular band of purple. Length, '5 ; breadth, 

 85 ; angle of spire, 92 to 111. 



Common. 



TROCHUB. 



Pyramidal, with nearly a flat base ; aperture oblique,, rhombic, 

 pearly inside. 

 World-wide. 



* 149. T. gibberOSHS, Chemnitz ; T. incequalis, Martyn. Shell 

 imperforate, depressly conoid, opaque white variously stained with 

 orange rust ; whorls slopingly convex, obliquely decussated with small 

 nodose ribs and very close set stria3 ; obsoletely obtusely squamate at 

 the margin ; base convexly flattened, ridged ; ridges rather distant, 

 crenulated, interstices excavated and striately decussated. (Reeve) 



* 150. T. viridis, GmeUn. Shell excavately umlulicated, conical, 

 green; whorls seriately plicately grained; grains sometimes small and 

 obtuse, sometimes larger, fewer, and somewhat sphu us ; base flatly 

 concave, circularly striated. (Reeve.} 



