MOLLUSCA. 469 



Order PULMONIFERA. 



Family AUEICULID^. 



86. Melampus castaneus, Muhlf. 



87. J/. Massauensis, Pfr. 



88. Plecotrema, sp. hot. 



It is usual to consider the Auriculidoe land-shells : 

 this, however, is incorrect ; they are no more land-shells 

 than Pyrazus or Littorina are ; the majority of them 

 inhabit estuaries and mangrove swamps, others are 

 littoral shells, like Patella or Purpura. 



Class LAMELLIBRANCHIATA. 



Family GASTROCH.EXID^. 



89. Rocellaria ovata, Sow. 



A Mazatlan species, but unmistakeably identical. 



Family COEBULID^. 



90. Corhula crassa, Hinds. 



Family ilACTPJD^. 



91. Mactra semisulcata, Kv. 



Family TELLIFID^. 



92. Asaphis dejlorata, L. 



93. Donax vittaius, Lam. 



Syn. D. trifasciatus, Ma we. 



94. Tellina culter, Hanley. 



95. T. carnea, Bens. 



96. T. capsoides, Lam. 



97. Strigilla Senegalensis, Hanley. 



98. Paphia striata, Chem. 



