MELVILL : NEW SPECIES OF MARINE (;ASTR0P0DA. 83 



lepide alveata, ultimo ad peripheriam subangulato, apertuia ovatcj-rotunda, 

 labro tenui, angulata, columella uniplicata. 



Long. 2, lat. .75 millim. 



Hal). — Gulf of Oman. Lat. 24° 58' N., long 56° 54' E., 156 fathoms. 



The .smallest by far of the four Oscillae yet detected as occurring in 

 this region, and of which very few specimens have come to light. It appears 

 mature, the angle at the periphery alone will distinguish it from its congeners. 



Mumiola earbasea,'^' n. sp, 



PI. viii, fig. 12. 



M. testa ovato-oblonga, parum perforata, delicata, albo-lactea, papyracea, 

 anfractibus 6, quorum i^ apicales, globulosi, vitrei perlaeves, apice ipso de- 

 presso, caeteris gradatulis, undique tenui costatis, costis fere rectis, interstitiis 

 arctissime spiraliter liratis, costis ultimum apud anfractum numero circiter 18, 

 interdum ad basim fere evanidis, ajjertura ovata, labro tenui, columella sim- 

 plice, paullum incrassata. 



Long. 3, lat. 1.30 millim. 



Allied to M xpirafa, Ad., found also in the Arabian Sea; but its gradate 

 whorls, depressed globular apex, delicate ribs, and o\ al mouth with simple 

 unplaited columella, differentiate this species from its congeners. 



Eulima (Subularia) hypolysina, n. sp. 



PI. viii, fig. 13. 



E. testa vitrea, aciculata, per-attenuata, delicatissima, anfractibus 8 — 9, 

 undique albo-hyalinis, laevissimi.s, politis, ad suturas impressis, tumidulis, 

 lateribus infra fere rectis, ultimo interdum obscure spiraliter rufozonulato, 

 paullum producto, apertura anguste oblonga, labro superne, juxta suturas, 

 sinuato. 



Ix)ng. 3 50, lat. I millim. 



Hah. — Gulf of Oman. Lat. 24" 58' N., long. 56" 54' E., 156 fathoms. 



This narrow, hyaline little species, of extreme fragility and deHcacy, is, 

 as pcjinted out to me first by .Mr. E R. S}kes, chiefly remarkable for the 

 rounding off, and conseiiuent sinuate appearance of the thin, llexuous and 

 slightly effuse outer lip, as it approaches the suture Tn this res]ject, though 

 not to so great an extent, it assimilates the terrestrial /////«)///.s-/r^ llorenfiae, 

 M. and P., from Natal, a genus allied to Opeax, and the specific name is 

 proposed from that circumstance. E. ( Suhularla) hicitfafa, H. iK: A. Ad., 

 occurring most plentifully with it, at no stage of its existence presents the 

 same characteristics. 



8. Cabasus, white sail-cloth, from the papyraceous texture. 



