418 Mr. E. A. Sraitli on some Land-8heUs 



The brown colour beneath tlie central angulation is a trifle 

 darker than the tint of tlie upper surface. This has the ap- 

 pearance of being marked with obliquelj-curved lines of 

 growth, but under tlie lens it is seen to be sculptured with 

 very minute wrinkly striae in the same direction. The lower 

 surface, which is more glossy, is destitute of this wrinkly 

 sculpture, and has instead very fine close-set hair-like con- 

 centric undulating striee which are invisible to the naked eye. 



Nanina exih's, jnv. (PI. X"V. fig. 13.) 

 Testa depressa, acute carinata, perforata, superne griseo-cornea, in- 

 inferne pallidior ; anfractus 6, convesiusculi, supra suturam 

 depresse marginati, striis incrementi seulpti ; ultimus compresse 

 et acute carinatus, inferne nitidus ; apertura ol)li(|ua, subsecu- 

 riformis ; peristoma tenue, margine columellari superne leviter 

 reflexo. 

 Diam. max. 27 millim., miii. 24, alt. 13|. 



Hah. British New Guinea. 



The sculpture of the upper surface of this species is almost 

 precisely the same as that of N. Cairni. It is, however, a 

 more sharply carinate shell, and has more numerous and 

 narrower whorls. It is more acutely carinate than the type 

 of N. exilis, Mliller, lacks the brown band below the keel, and 

 is a trifle more finely striated. 



Helix [Sphcerospira) BeJiset, Martens. (PI. XV. fig. 14.) 



Hah. Dinner Island, New Guinea {Brazier). 



This species I described as //. Gerrardi* a month or two 

 after the publication of Martens' diagnosis f- I then had 

 only a single specimen under examination. Three additional 

 examples, two of which were sent by Mr. Brazier, have since 

 been added to the Museum collection. These show that the 

 species varies considerably with regard to the umbilicus, 

 which, as in the type, may be rather broad, or it may be gra- 

 dually closed up by the overspreading reflexed columellar 

 margin of the peristome, leaving only a small perforation. 

 The indications on the body-whorl of a few shallow transverse 

 indistinct sulci observable in the shell I originally described 

 are less apparent (but still traceable) in the other specimens 

 now at hand. The spire varies in height, and seems to be 

 usually rather less elevated than in the specimen described in 

 the * Annals.' The granulation of the spire is also variable, 

 being more sti-ongly developed and extending much further 

 down in some specimens than in others. 



* Ann. & Mag. Nat. Hist. 1883, vol. xi. p. 192. 

 t JaLrb. deutsch. n:alak. Gesellscb. 1883, p. 83. 



