SUBEMARGINULA. 281 



S. nodulosa A. Adams. PL 29, fig. 23. 



Shell ovate, obliquely conical, whitish-rufescent, vertex subcentral, 

 posteriorly declining ; decussated by longitudinal nodose radiating 

 ribs, two front side ones very large, and irregular transverse lira?, 

 margin of aperture irregular, acuminate behind, truncate in front, 

 sinuate, the sinus produced inside into a channel. It is like Pan- 

 hiensis [triearinata] but the rugosities are swelled into large bosses 

 ou the large ribs. (Ad.) 



Sibonga, Island of Zebu, Philippines, 10 fms. on small stones. 



Subemarginula nodulosa Ad. P. Z. S. 1851, p. 91. — E. nodulosa 

 Sown. Thes., p. 218, f. 77. 



S. i.ambertt Souverbie. PI. 63, figs. 27, 28. 



Shell oblong-ovate, patelliform, much depressed ; apex minute, 

 situated almost at the posterior third of the shell's length, shortly 

 recurved backward and prominent; front slope convex and car- 

 inated, subconcave-plane behind, having obtuse, rather wide radiat- 

 ing ribs, with intervening smaller ones, especially behind, and with 

 concentric ribs decussating the ribs and interstices ; white, radiated 

 with rosy, the rays seen on the interior ; marginal slit almost none. 



Length 17'., width 12, alt. 3 mill. 



Is. of Lifou, (Loyalty), New Caledonian Archipelago. 



S. lamberti Souv. Journ. de Conchyl. 1875, p. 294, t. 13, f. 10. 



S. polygonalis A. Adams. PL 29, figs. 34, 35. 



Elongate-oval, depressed-conic, white, 8-radiate ; vertex subcen- 

 tral, inclined backward ; roughened by subnodulous radiating ribs 

 (8 larger ones) and concentric growth-lines ; aperture octagonal, 

 margin crenulated, deeply sinuated in front, a canal continuing the 



sinus inside. (Ad.) 



Catanuan, Philippines. 



Subemarginula polygonalis Ad., P. Z. S. 1851, p. 91, no. 16. — E. 

 polygonalis Sowb., Thes. p. 217, f. 78. 



S. cumingii Sowerby. PL 29, fig. 24. 



Oblong, irregularly polygonal, broad, much depressed, sub-green, 



with angular rugose unequal radiating ribs; apex a little before 



the middle, fissure subquadrate, much more depressed and wide 



than E. scutellata, and the sculpture less deeply cut and rugose. 



(Sowb.) 



Australia. 



E. cumingii Sowb., Thes. iii, p. 217, f 76 ; Conch. Icon. f. 41. 



