Zoological Society. 493 



the M. crenulata, that I cannot reframfrom separating it as a distinct 

 species. 



MiTRA NANUS. Mitr. testd ahbreviato-ovatd, spird brevi, acutd, 

 iransversim undique sulcatd, sulcis basin versus profundioribus ; 

 rubido-fuscd, balteo angusto flavicante, pecuUariter albimaculatOy 

 cinctd ; columelld quadripUcatd. 



Conch. Icon., Mitra, pi. 24. f. 193. 



Hab. } 



Distinguished by its narrow yellow belt, which has a peculiar 

 white knotted appearance. 



Mitra porphyritica. Mitr. testd obeso-ovatd, basi subgranosd, 

 spird acute turritd; longitudinaliter plicato-costatd, costis angu- 

 latis ; anfractibus supra albicantibus, infra olivaceo-cinereis, aJbi' 

 zonulatis ; columelld quadripUcatd ; aperturd brevi. 

 Conch. Icon., Mitra, pi. 25. f. 195. 



Hab. Island of Ticao, Philippines (found under stones at low 

 water) ; Cuming. 



A short stout species, with a sharp angularly turreted spire, en- 

 circled with bands of a peculiarly livid olive-ash-colour. 



Mitra virgata. Mitr. testd oblongo-ovatd, spird brevi, apice acu- 

 minata; laevigata, nitidd, basin versus impresso-striatd ; niger- 

 rimo-fuscd, virgis albis longitudinalibus flexuosis, interdum medio 

 interruptis, ornatd, anfractu ultimo zonula pallidd angustd non- 

 nunquam superne cingulato ; columelld quadripUcatd ; labro medio 

 contracto, superne sinuato. 



Conch. Icon., Mitra, pi. 25. f. 197 a and b. 



Mitra retusa, var.. Gray ; Zool. Beechey's Voyage. 



Hab. Island of Luzon, Philippines (found under stones and in 

 crevices of rocks) ; Cuming. 



This species is exactly intermediate between the Mitrce paupercula 

 and retusa. 



Mitra chrysalis. Mitr. testd ovatd, spird brevi, subretusd; trans^ 

 versim undique sulcatd ; fused aut fuscescente, anfractu ultimo 

 maculis interruptis medio uniseriatim cincto ; columelld quadripU- 

 catd; labro medio contracto. 



Conch. Icon., Mitra, pi. 25. f. 200. 



Hab. ? 



May be distinguished from the young of the Mitra cucumerina by 

 its peculiarly contracted lip. 



Mitra concinna. Mitr. testd ovatd, basi contractd, spird turritd; 

 anfractibus superne angulatis, longitudinaliter costatis, costis an- 

 gulum super granoso-mucronatis, liris parvis obtusis transversim 

 decussatis ; liris transversis vividi luteis, interstitiis nigricante- 

 castaneis ; columelld quadripUcatd. 



Conch. Icon., Mitra, pi. 26. f. 203. 



Hab. Island of Masbate, Philippines (found under stones at low 

 water) ; Cuming. 



A bright prettily painted species, very closely approximating in 

 form and sculpture to the Mitra crocata. 



