OF CONCHOLOGY. 163 



DESCRIPTIONS OP NEW SPECIES OP MARINE MOL- 



LUSCA. 



BY WESLEY NEWCOMB, M.D. 



MiTRA WiLLiAMSi, Newc. — Plate 17, fig. 1. 



M. testa elongato-ovata, crassa, undique transversim costata ; 

 inter costas sublente in longitudinera striata ; anfr. 6, subplanis ; 

 ultimo in longitudine reliquis asquali ; apice obtusula ; sutura 

 obscura impressa ; columella subtorta indistincte quadriplicata ; 

 colore alba cum flammeus lineis irregulariter in longitudinem 

 picta. 



Long. '6 pol. ; lat. '2 pol. ; long. aper. -S pol. ; lat. aper. '05 

 pol. 



Jlab. — Philippine Islands. V 



Shell elongatelj ovate, thick, wholly transversely costate, 

 under the lens longitudinally striate between the ribs ; whorls 6, 

 flattish, the last equal to the rest in length ; apex somewhat 

 obtuse ; suture slightly impressed ; columella scarcely twisted, 

 with 4 plications, tLe last indistinct. Color white with orange 

 flammules arranged longitudinally. 



Remarks. — This little shell collected by Captain Saml. J. Mas- 

 ters at the Philippines or at Guam, has been submitted to the 

 critical eye of Mr. Cuming, who pronounced it new ; and not 

 being able to find it in any of the great European collections, I 

 have, after a delay of some 12 years, decided to describe it : — I 

 take pleasure in attaching the name of Prof. Williams, of Ithaca, 

 to this beautiful species. 



MoDiOLA Peasef, Newc. — Plate 17, figure 2. 



M. testa tenui, polita, luteo albida, tenuissime striata ; parte 

 postera cum lineis et fasciculis fuscis inosculatisque picta ; intus 

 margaritacea-alba. 



Long. 8-10 pol. ; lat. 4-10 pol. 



