TRACHELIPODA. 



87 



Section * Shells Avitli a slender beak, always longer than the af)er- 

 tui-e. 



*• Beak thickened, not abrupt, and more or less lengthened. 



t Volutions with three varices. 



t t Volutions with more than three varices. 



Murex spiralis The Spiral Metrex. Plate XI, fig. 



27. Body roundish ; separated from the spire by a narrow 

 ridge ; spire depressed ; upper volutions rounded, and ter- 

 minating in an obtuse apex ; canal very long and curved ; 

 flesh-coloured, substriated, with remote brown irregular 

 spots. Three inches long. Inhabits the Chinese seas. 



Genus 28 RANELL A.— Lamarck. 



Generic Character Shell oval or oblong; sub-depressed 



with two opposite continuous varices, and canaliculated at 

 the base ; aperture rounded or ovate ; varices straight or 

 oblique, situated at intervals of half a volution, forming a 

 continuous longitudinal row on each side. 



Ranella spinosa. — The Prickly Ranella. Plate XII. 

 fig. 1. Ovate, depressed, with acute, short, distinct, muri- 

 cated tubercles ; fawn-coloured ; varices lateral, with elon- 

 gated spines ; beak sulcated ; outer lip internally crenated. 

 Two inches and an eighth long. Inhabits the Indian ocean. 



Genus 29— STRUTHIOL ARIA.— ZamarcA. 



Generic Character Shell ovate ; spire produced ; aper- 

 ture oval, with a sinus, terminated at the base by a very 

 short, straight canal without any notch ; pillar lip callous, 

 spreading; margin of outer lip sinuous, with an exterior 

 ridge. 



Struthiolaria nodulosa. — The Nodulous Struthio- 

 LARiA. Plate XII. fig. 2. Ovate, grooved, and striated 

 transversely ; top of volutions flattened and nodulous ; 

 cream-yellow, with undulated brownish-yellow longitudinal 

 lines ; lip yellow-orange within. Three inches long. In- 

 habits New Zealand. 



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