97 



70. nitida, Sow. 



71. nitidula, Adams. 



72. obesa, St imp. 



73. obliqua, Lam. 



74. ornata, If Orb. 



75. Patagonica, id. 



76. paulula, Adams. 



77. Paytensis, id. 



78. pella, Linn. 



79. pernula, Mull. 

 SO. pisum, #o?0. 



81. plicifera, Adams. 



82. Polii, PA*7. 



83. polita, Sow. 



84. Portlandica, Hitch. 



85. proxima, #«y. 



86. puellata. Hinds. 



87. pulchra, i«?. 



88. pygmsea, Munst. 



89. radiata, Hartley. 



90. recta, Hinds. 



91. recurva, Conrad. 



92. retusa, Hinds. 



93. rugulosa, #o#?. 



94. sapotilla, Gould. 



95. semisulcata, ^c?. 



96. serotina, Hinds. 



97. siliqua, Reeve. 



98. simplex, Adams. 



99. Sowerbyana, If Orb. 



100. splendida, _P/«7. 



101. Strangei, Adams. 



102. striata, &>?#. 



103. striolata, Adams. 



104. sulcata, w?. 



105. sulculata, Gould. 



106. Taylori, Ifcrafey. 



107. Tellinoides, JFoo^. 



108. tenella, Hinds. 



109. tenuis, .Sfowtf. 

 1-10. tenuisulcata, Couth. 



111. Thracifleformis, Storer. 



112. turaida, Hinds. 



113. ventricosa, zW. 



114. vitrea, Z>'Od. 



Figure. 



Nucula crassa. PL 31. Fig. 178. Shell, with the left valve dropped 

 to show the comb-like teeth on either side of a central pit containing 

 the ligament. 



Genus 5. SOLENELLA, Soiverby. 



Animal ; mantle margins slightly fringed, a pair of long and slen- 

 der united siphonal tubes ; foot deeply grooved, forming an oval 

 disk. 



Shell; thin, longitudinally oval, equivalve ; hinge composed of 

 three or four small teeth anteriorly, and a row of numerous 

 small comb-like teeth posteriorly ; ligament elongated, external. 



A very characteristic genus, intermediate between Solen and Nucula, 

 founded on a single species collected many years since by Mr. Cuming at 

 Valparaiso. It is very thin in substance and is covered with a shining olive 

 horny epidermis. The hinge is composed of a comb-like row of teeth like 

 those of Nucula, but only in the posterior side, and the ligament is quite 

 external. The animal resembles that of the Leda division of Nucula, hav- 

 ing a pair of siphons. 



Figure. 



Solenella Norrisii. PI. 43. Fig. 231. Shell, with one valve dropped 

 to show the posterior comb-like teeth and external ligament. 



VOL. II. 



