418 MESSRS, A. ADAMS AND G. FRENCH ANGAS [NoV. 10, 



tibus cardinalibus elongatis valde divergentibus, postico bifida, 

 antico prominulo ; intus iridescente, 

 Alt. \^ inch, lat. 3 inches 2 lines. 



Hub. Lagoon, Mount Margaret, Central Australia {CoU. Angas.'). 



This species, which we have named after Mr. J. M'^D. Stuart, the 



leader of the expedition, is the only Naiad, besides Alasmodon anga- 



Sana of Lea, yet discovered in the regions traversed by the explorers. 



11. Descriptions of New Species of Shells from the Aus- 

 tralian Seas, in the Collection of George French 

 Angas. By Arthur Adams, F.L.S., and G. F. Angas, 

 CoRR. Mem. Z. S, 



(Plate XXXVII.) 

 I. Gasteropoda toxifera. 



The southern shores of the Australian continent, compared 

 with those extending into the Tropics, are by no means prolific in 

 species of the genus Conus ; C. novcp.-hollandice and C. anemone 

 (species frequently confounded) are the most abundant. The Turris 

 or Pleurotoma family are better represented ; and we have selected for 

 description some interesting new forms. To the limited genus Euryta 

 (a peculiar group of Terebridce) we have added two new species. 



1. Euryta trilineata. Ad. & Aug. (PL XXXVII. fig. 13.) 



E. testa turrito-fusiformi, graciJi ; spira quam apertura longiore; 

 albida, fasciis longitudinalibus undulatis fuscis, et serie macu- 

 larum fuscarum ad suturas ornata, lineisque tribus transversis 

 filiformibus ad anfractum ultimum succincta ; anfractibus 9, 

 planiusculis,longitudinaliterplicatis,plicis in medio anfractuum 

 subnodulosis, in anfractu ultimo obsoletis, transversim sulcatis, 

 sulcis subdistantibus ; apertura angusta ; labia antice violas- 

 cente tincto. 

 Long. 7 lines, lat. 1 \ line. 

 Hab. Port Jackson {Coll. Atigas.'). 



This species of Euryta (a group separated from Terebra on ac- 

 count of the spirally rolled axis and Mitriform aspect) differs from 

 the others described in being more slender, and in the whorls being 

 encircled with thread-like lines. 



2. Euryta pulchella. Ad. & Ang. (PI. XXXVII. fig. 14.) 



E. testa olivaformi ; spira quam apertura breviore ; alba, nitida, 

 lineis longitudinalibus undidatis confertis pallide fulvis ornata; 

 anfractu ultimo fasciis tribus albis transversis instructo, an 

 fractibus longitudinaliter plicatis, plicis parvis confertis, in 

 anfractu tdtimo obsoletis, suturis crenatis ; apertura angusta ; 

 labio subflexuoso ; labro simplici, acuto. 



Long. 5 lines, lat. \\ line. 



