MORCH ON THE MOLLUSC A OF GREENLAND. 127 



65. M. (Mamma, subg., Kl. ?) borealis, Gray, 1839, Beechy's 

 Voy., t. 37, f. 2. 



N. nana, Moll. 



66. M. (Amauropsis, subg., Morch) islandica, (Nerita) Gm. 



Natica helicoides, Johnst. 

 (67.) var. fragilis. Natica cornea, Moll. 



68. Amaura Candida, Moll. H. & A. Adams, Gen. 



69. Aclis Walleri, Jefir. (Hamilton Inlet, Labrador; Wal- 



lich.) 



70. Rissoa (Onoba, subgen.) saxatilis, Moll. 



Trochus striatellus, Fab. non L. Rissoa arctica, Lovdn. 



71. R. (Paludinella) globulus, Moll. 



72. Rissoa (Onoba, subg.) castanea, Moll. 



R. exarata, Stimps. Sh. New Engl., p. ' 



73. R. scrobiculata, Moll. 



74. Rissoella eburnea, (Rissoa) Stimpson. 



Boston Journ., Proc, IV., 14. Shells of New Engl., p. 34, t. 1, 

 f. 1, sed spm. groenlandica differunt : labro medio coarc- 

 tato et columella torta. Moller, Index, Addende, No. 4, 

 Gasteropus. (Godthaab, 60 fathoms, Holb.) 



75. Skenea planorbis, (Turbo) Fabr. Moll. Loven. 



76. Homalogyra rota, Forbes & Hanley. (1,622 faths., 



Wallich.) 



77. Moelleria costulata, (Margarita) Moll. F. & H. (Godt- 



haab, 60 fathoms, Holb.) 



78. Turritella (Tachyrhynchus, subg.) erosa, Couth., Bost. 



Journ. 



T. polaris, Bk. & Moll. 



79. T. (Tachyrhynchus, subg.) reticulata, Mighels & Adams, 



Bost. Journ., iv., 50. 

 T. lactea, Moll. 



80. Cerithium (Bittium, subg.) arcticum, Morch. (Sukker- 



toppen, 65 fathoms, Holb.) 



Turritella ? costulata, Moll. (Nee Lam. nee Risso.) 



81. Trichotopis borealis, Brod. & Sow. 



Tr. atlantica, Bk. 



82. Tr. conica, Moll. (Near Fladoerne, 30 fathoms ; Sondre 



Stromfjord, 60 fathoms.) 



83. Aporrhais occidentalis, Bk. (A fragment from Dr. 

 Vahl.) 



.84. Cancellaria (Admete, subg.) viridula, (Tritonium) Fabr. 

 Adams, Gen., t. 29, f. 5. 



Admete crispa, Moll. C. buccinoides, Gonth. C. Couthouyii, 

 Jay. 



Ordo II. — Toxoglossata, Troschel. 



85. Pleurotoma (Ischnula, Clark ; Pleurotomina, Bk., subg.) 



turricula, Mont., var. 

 Subsp. 1. Murex angulatus, Don. 



, Defrancia nobilis, Moll. Pleurotoma Mcelleri, Reeve, f. 324. 

 Defr. lactea, Moll., teste Reeve. 



86. Subsp. 2. Defrancia scalaris, Moll. 



Fusus turriculus, Gould. 



87. Subsp. 3. Defrancia exarata, Moll. 



Pleurotoma rugulata, " Moll." Reeve, f. 345. 



