NATICA niustelina, 



Belted Natica — upper figures. 

 Generic Character. — See PI. 75. 



Specific Character. 



N. testa, subglobosd, miisteUnd cuncuhre, obsolete rugatd, fascia levatd 

 basin cingente ; spird depressd, apice acutu ; umbilico niagno, aperto; 

 columelhe bast gracili, levatd. 



Shell sub-globose, uniform, fulvous-brown, obsoletely wrinkled, base 

 with an elevated belt ; spire depressed, the tip acute ; umbili- 

 cus large, open; pillar termination slender, elevated, and central. 



— miinil^ii 



1 HE elevated belt at the base affords an excellent distinction 

 to this species. The specimen in my cabinet is the only one 

 I have seen. Locality miknovvn. 



NATICA sordida. 

 Brown Natica — middle figures. 



N. testd subglobosd, fused, spird prominente ; aperturd intus fusco-pur- 



pured ; umbilico parvo, labia interiore paululum tecto ; columella 



obsolete tenninante. 

 Shell sub-globose, brown ; spire prominent; aperture within purplish 



brown ; umbilicus small, partially covered by the inner lip ; 



pillar termination obsolete. 



Ihis Shell is both undescribed and apparently unfigured ; 

 the spire is more elevated than usual ; the umbilicus small ; 

 and the termination of the pillar not seen : it is not uncommon, 

 and is otten much larger than here represented, but I am un- 

 acquainted with its locality. The little decision in the figures 

 given by authors of these shells, renders it hazardous to quote 

 them with certainty. 



NATICA melastoma. 

 Black-mouthed Natica — lower figures. 



N. testd depressd, fused ; spird comp/anatd minimdj ore intus atro-pur- 

 pureo ; umbilico magna, clauso labio interiore rufo. 



Shell depressed, brown; spire flattened, very small ; mouth within 

 purplish black ; umbilicus large, closed up by the inner lip, 

 which is rufous. 



In colour this bears a close resemblance to the last, but the 

 shell is flattened beneath, and the spire very short and de- 

 pressed ; the umbilicus large, but, in general, quite closed up 

 by the thickness of the pillar, united to the inner lip. In some 

 specimens a narrow crescent-shaped groove is left on the out- 

 side margin. Its habitat is unknown. 



PI. 79. 



