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MACRO-FAUNA OF THE LA SALLE Lj-MESTONE MEMBER OF THE BOND FORMATION 



For those who are also interested in macro-invertebrates, the La Salle pro- 

 duces a fairly large fauna at this place. Below is a list of species described 

 from the area. Plates 1 and 2 illustrate most of them. 



Lophophyllidium proliferum McChesney 



Orbiculoidea subtrigonalis (McChesney) 



Rhipidomella carbonaria (Swallow) 



Meekella striaticostata (Cox) 



Neochonetes granulifer (Owen) 



Chonetinella verneuilianus (Norwood and Pratten) 



Linoproductus "coxa" d'Orbigny 



Retaria lasallensis (Worthen) 



Kozlowskia splendens (Norwood and Pratten) 



Juresania nebrascensis (Owen) 



Dictyoclostus semireticulatus (Martin) 



Echinaria semipunctata (Shepard) 



Cryptocantha compacta (White and St. John) 



Beecheria bovidens (Morton) 



Neospirifer cameratus (Morton) 



Crurithyris planoconvexa (Shumard) 



Phricodothyris perplexa (McChesney) 



Punctospirifer kentuckyensis (Shumard) 



Composita subtilita (Hall) 



Planispina armata (Cirty) 



