1917.] NATURAL SCIENCES OF PHILADELPHIA. 225 



Melanella kahoolawensis n. sp. PI. XIV, fig. 9. 



The shell is irregularly but slightly curved, acuminate near the 

 apex, solid, whitish. The whorls are nearly flat, suture not impressed, 

 bordered below by a rather wide grajdsh-white band. On the penult 

 whorl there is one varix near the left side, the two preceding whorls 

 each having a varix on the right side. The aperture is ovate; outer 

 lip blunt, strongly retracted above (fig. lid). Columella vertical, 

 somewhat thick. 



Length 9.4, diam. 3.25 mm.; length of aperture 3 mm.; about 

 12 whorls. 



Kahoolawe, northern shore; t>i3e No. 116219, collected by Pilsbry, 

 1913. 



This species is related to M. acicula, but the spire is stouter, more 

 attenuate near the apex, the aperture is larger and the outer lip more 

 retracted above. 



Melanella opaca (Sowerby). 



Eulima opaca Sowb., Conch. Icon. XV, 1865, PI. 4, fig. 30 (Sandwich Is.). 



Specimens from Hilo, "found only on sea cucumbers" by Mr. 

 Thaanum, are figured, PI. XIV, fig. 11. The identification is pro- 

 visional, as Mr. Sowerby's description does not mention several 

 important characters. 



The shell is solid, slippery, opaque white, without a distinct 

 margin below the suture. The spire is slightly curved, the apex 

 deciduous. Whorls are slightly convex, and have a straight series 

 of deeply impressed varix-grooves along the right side. The outer 

 lip is rather thick, a little contracted, and only weakly arched forward. 



Length 11, diam. 4 mm.; 8| whorls remaining. 



The specimens are No. 94583 A. N. S. P., from No. 845 of Mr. 

 Thaanum's collection. 



Melanella solida (Sowerby). 



Eulima solida Sowb., Conch. Icon. XV, 1865, PI. 3, fig. 18 (Sandwich Is.). 



I have not seen this species, which should be recognizable by the 

 thick lip. 



Melanella conoidalis (Sowerby). 



Eulima conoidalis Sowb., Conch. Icon. XV, 1865, PI. 3, fig. 22 (Sandwich Is.)- 



Possibly an immature shell. 



Melanella acanthyllis (Watson). 



Eulima acanthyllis Wats., Challenger Rep., Gastropoda, p. 512, PI. 35, fig. 8, 

 (Reef off Honolulu, 40 fathoms). 



A minute species, about 2.5 x 0.8 mm. 



