64 



NUCULIDjE. 



pella, Linn., L. 23, f. 65, 66. 

 ■pella, Gm. = fragilis. 

 pella, Sow. = confusa. 

 pella, Brug. = commutata. 

 pellucida, Gm. = Nicobarica. 

 peruula, Miill, L.14, f.56, 57, 58. 

 pisura. Sow., N. 14, f. 133. 

 pUcifera, Adams = bicuspidata. 

 Polii, Phil. = decussata. 

 poHta, Sow., L. 36, f. 68. 



PORTLANDIA, pp. 2, 40. 



Portlandica, Hitch. = glacialis. 

 proxima, Say, N. S, f. 118, 119. 

 Puelcha, B'Orb., N. 22, f. 149. 

 pueUata, Hinds, L. 39, f. 94. 

 piilchra, Hinds, N. 13, f. 146. 

 pygmcea, Munst., L. 70, f. 26, 27. 

 radiata, Dekav = proxima. 

 radiata, Hani., N. 4, f. 123, 134. 

 recta. Hinds, L.,* f. 175 (uude- 



tennined) . 

 reeurva, Conrad = rostrata. 

 reticidata. Hinds, L. 46, f. 103. 

 retusa, Hinds, L. 71, f. 28, 29. 

 Rnssianus, Hisso = peDa, Linn, 

 rostrata, Gmel. & Schum. = per- 



miki. 

 rostrata, Mont., L. 24, f. 84. 

 rostrata. Sow. = caudata. 

 rugulosa. Sow., p. 149. 

 sapotUla, Gotdd, L. 63, f. 16. 

 semiornata, D'Orb.=pisum,t var. 



semisulcata, Adams = lata. 

 serotina, Hinds, L.54, f. 19, 20,21. 

 siliqua, Keeve = glacialis. 

 simplex, Adams, N. 27, f. 137. 

 Sowerbiana, I)'0r6., L. 2, f. 33. 

 Strangei, Jdam.s, N. 26, f. 125. 

 striata, Kiiiff, p. 19. 

 striata, Phil. = commutata. 

 striata. Sow. = fi'agilis. 

 striolata, Adams, N. 3, f. 129. 

 sulcata, PhU. = decussata. 

 sidcata, Adams, N. 12, f. 127. 

 sulcatus. Leach = caudata. 

 siUcifera, Reeve, L. 73, f. 165, 166. 

 sidcidatits, Risso (indeterminable), 

 snlcidata. Couth., p. 25, f. 177. 

 Tavlori, Hani., L. 7, f. 35. 

 Teilinoides, Sow., L. 4, f. 36. 

 teneUa, Hinds, L. 56, f. 15. 

 tenius, Mont., N. 33, f. 140, 141. 

 tenuis, MoUer = inflata. 

 tenuisulcata. Couth., L. 13, f. 87. 

 Tlu'aciceformis, Storer, L. 66, f. 4, 



13. 

 truncaia. Brown = glacialis. 

 tumida. Hinds = convexa. 

 tiu-gida, Qould, p. 159. 

 ventricosa. Hinds, L. 32, f. 88, 89. 

 vitrea, i>'0;-A., L. 48, f. 170. 

 YoLDiA, pp. 2, 34. 

 Woodwardi, Ha7il., L. 62, f. 17, 



22. 



* " T. oblonga, tumida, inclinate sulcata, recte et attenuate rostrata, postice ro- 

 tundata." 



t As the engraving of this shell would hardly warrant this syiion}^!, I subjoin a 

 description of D'Orbigny's types, which now rest in our national Museum. — 



N. SEMIORN'AT.i. B'Orb. limer. Merid. 624. /;/. 84./. 27, 28, 29.— Somewhat ob- 

 liquely ovate, much longer than broad, subventricose, with a shiuing ashy-olive epi- 

 dermis, concentrically traversed, towards the ventral margin, especially in front, by 

 somewhat wavy and rather irregular riblets, aud adorued on the dorsal regions with 

 divergent curved close costellar strise ; otherwise unsculptm-ed, yet with traces of the 

 radiating crenulse near the shorter end. Anterior side much produced, its tip well 

 rounded and slightly tapering ; its dorsal edge convex. Posterior side extremely 

 short, its lower corner cut off by the oblique rise of the arched and finely crennlated 

 ventral margin. Posterior edge almost perpendicular, convex. Dorsal areas uude- 

 fined. ^. San Bias, N. Patagonia. 



