328 On new Species o/'PleurotoinidjB. 



reddish orange. The upper ends of the ribs are prominent 

 and somewhat acuminated ; thej are not continuous up the 

 spire, but are alternate. Around the cauda of the body- 

 whorl there are a few coarsish lirse. 



Cithara typica. 



Testa breviter fusiformis, albida, lineis spiralibus luteis (in anfr. 

 ultimo 5) ornata ; anfr. 7, primi 3 laeves, convexi, cseteri superne 

 declivitcr plauulati, infra medium rotunde angulati, costis plicosis 

 (in aufr. ultimo ad 10, basi continuis) instructi, ubique trans- 

 versim spiraliter continue lirati ; apertura longit. totius -fj ad- 

 sequaus ; columella callo tenui labro juncto induta, liris trans- 

 versis ad 10 munita ; labrura extus incrassatum, intus dentatum 

 (dente supremo maximo), superne levissime sinuatum ; canalis 

 brevissimus, rectus. 



Long. 6-i- mill., diam. 2.^^. 



Hob. ? 



Under a compound microscope some of the very small spiral 

 lirations are seen to be minutely granulated. The transverse 

 banding is not very apparent. 



Cithara matakuana. 



Testa breviter ovato-fusifoimis, alba vel dilute cseruleo-alba ; an- 

 fraet. 8, primi 3 laeves, convexi, caeteri superne excavati, infra ex- 

 cavationem plani, costis superne in medio anfractuum subito trun- 

 catis instructi (in anfr. ultimo 11 fere ad basim continuis), striis 

 tenuissimis spiralibus incrementique lineis ubique niiuutc striati ; 

 apertiTra longit. totins ^ paido superans ; columella callosa, 

 transversim valde lirata ; labrum extus valde incrassatum, intus 

 (ad 10) valde dentatum, prope suturam leviter sinuatum; caiialis 

 brevissimus. 



Long. 10 mill., diam. 4. 



Hah. Mataku, Fiji Islands. 



Tn this species the upper half of each whorl is concave, the 

 lower fiat and ribbed, the ribs not extending into the conca" 

 vity ; the teeth on the labrum are very large. 



Cithara seychellarum. 



Testa breviter fusiformis, alba, punctis fuscis inter costas supra 

 angulum ornata ; anfract. 8, superne angulati, iuferne levissime 

 convexi, costis tenuibus ad angulum acutis (in anfr. ultimo 1], 

 basi fere continuis) instructi, ubique transversim tenuissime 

 striati ; apertura angusta, lougit. totius ^ paulo superans ; colu- 

 mella fuscescens, recta, transversim tenue lirata ; labrum costa 

 validissima extus incrassatum, intus liratum ; sinus minime con- 

 spicuus ; canalis brevis. 



Long. 14 mill., diam. 4^. 



