Nomenclature of the Foraminifera. 33 



Model no. 87. Nummulina planulata, Lamk.* (young). 

 Page 296, no. 4. 

 (No locality). PI. III. fig. 95. 



The Model has been constructed from a somewhat convex 

 individual, and the aperture is wrongly placed. 



Model no. 88. Nummulina (Assilina) discoidalis, D'Orb. 

 Page 296, no. 1. 

 Hah. ^ouih. Sea, at Rawack. PI. III. fig. 94. 

 This is an Operculina, one of the thick subvarieties of O. com- 

 planata, Def. The term Assilina has been applied to those flat 

 Nummulince which, having no alar flaps to their segments, do 

 not cover up their umbones, but leave the whorls apparent, with 

 or without an increased growth of the edges of the septa. 



Model no, 89. Siderolina laevigata, D'Orb. Page 297, no. 2. 

 Hah. Fossil, St. Pierre at Maestricht. PI. III. fig. 90. 



A variety of Calcarina Spengleri, Gmel., sp. ; a smooth, 

 quadrangular (or rather bluntly 4-spined), biconvex form, having 

 all traces of the chambers concealed by the excessive deposit of 

 shell-substance. 



Model no. 90. Biloculina hulloides*, D^Orb. Page 297, no. 1, 

 pi. 16. figs. 1-4. 



Hah. Adriatic, near Rimini; fossil near Paris and near 

 Bordeaux. PI. I. fig. 3. 



This varies but little in its outline from Biloculina ringens, 

 Lamk., sp., and B. Icevis, Defr., sp. 



Model no. 91. Biloculina depressa, D'Orb. Page 298, no. 7. 



Hah. Adriatic, near Rimini; fossil at Castel-Arquato. PI. I. 

 fig. 4. 



The flattened carinate subvariety of B. ringens. 



Model no. 92. Spiroloculina depressa"^, D'Orb. Page 298, no. 1. 



Hah. Mediterranean ; and fossil at Castel-Arquato. PI. I. 

 fig. 6. 



In the 'Annales des Sciences Naturelles' this Model is referred 

 to as Spiroloculina perforata — evidently one of the very numerous 

 misprints which occur in D'Orbigny's Memoir. We take the 

 name given with the Model as the one probably intended. The 

 form represented is Spiroloculina planulata, Lamk., sp. 



Model no. 93. Triloculina trigonula*, Lamk. Page 293, no. 1. 



Hah. Fossil near Paris, Soissons, and Valognes. PI. I. fig. 7. 



A good subtype. 

 Ann. S^ Mag. N. Hist. Ser.3. Vol.xvi. 3 



