C. D. Walcott — Position of the Olenellus Fauna. 389 



Brachiopoda. 



Kutorgina pannula, White (sp.) 



Prospectensis, Walcott. 

 Iphidea bella, Billings. 

 Acrotreta gemma, Billings. 

 Acrothele subsidua, White. 

 Obolella Atlantica, n. sp. 



chromatica, Billings. 

 Circe, Billings, 

 crassa. Hall (sp.) 

 gemma, Billings. 



* nitida, Ford. 



Orthis Highlandensis, Walcott. 



Salemensis, Walcott. 

 Orthisina festinata, Billinars. 

 orientalis, Whitfield. 

 ? transversa, Walcott. 

 ? (sp. undetermined.) 

 2 sp. ? 

 Camerella ? antiquata, Billings. 

 ? sp. ? 

 LarneUibranchiata. 



Fordilla Troyensis, Barrande. 

 Modiolopsis (??) prisca, Walcott. 

 Gasteropoda. 



cs-Helenia bella, n. gen., n. sp. 

 ^-Stenotheca ? elongata, Walcott. 

 •* curvirostra, S. and F. 

 ->? rugosa, Hall, (sp.) 



var. abrupta, S. and F. 

 var. acuta-costa, n. var. 

 var. erecta, n. var. 

 var. levis, n. var. 

 var. paupera, Billings. 

 Scenella conula, Walcott. 



-reticulata, Billings. 

 v — — i-retusa, Ford. 



- ? varians, Walcott. 

 Platyceras primsevum, Billings. 

 Pleurotomaria (Raphistoma) Attlebor- 

 ensis, Shaler and F. 

 Pteropoda. 



Hyolithes Americanus, Billings. 

 Billingsi, Walcott. 

 r^mmmj^ Billings. 



Y _ _-^_var. Emmonsi, Ford. 



y. _ _ -impar, Ford. 



princeps, Billings, 

 quadricostatus, S. and F. 

 sp. (undetermined.) 

 similis, n. sp. 

 terranovicus, n. sp. 

 Hyolithellus mieans, Billings. 



var. rugosa, Walcott. 

 Coleoloides typicalis, n. gen., n. sp. 

 Salterella pulchella, Billings, 

 rugosa, Billings, 

 curvatus, Shaler and F. 



Crustacea. 

 Leperditia (I) dermatoides, Walcott. 



sp.? 

 Aristozoa rotundata, Walcott. 

 Y -■■■■■- -~- Troyensis, Ford, 

 sp.? 

 Protocaris Marshi, Walcott. 

 Trilobita. 

 > Agnostus nobilis, Ford. 



desideratus, n. sp. 

 sp. 

 Microdiscusbella-marginatus, S.andF. 

 connexus, Walcott. 

 lobatus, Hall. 



<y _ - Meeki, Ford. 



Parkeri, Walcott. 



y speciosus, Ford. 



sp. ? 

 Olenellus (Mesonacis) Vermontana, 

 Hall (sp.) 

 (M.) asaphoides, Em. (sp.) 

 Gilberti, Meek. 

 Iddingsi, Walcott. 

 Thompsoni, Hall. 

 (M.) Broggeri, n. sp. 

 Paradoxides? Walcotti, Shaler and F. 

 Olenoides Fordi, Walcott. 



? Marcoui, Whitfield, (sp.) 

 Zacanthoides Eatoni, n. sp. 



levis, Walcott. 

 Bathynotus holopyga, Hall. 

 Avalonia Manueleusis, n. gen., n. sp. 

 Conocoryphe frilineata, Emmons, (sp.) 

 Ptychoparia Adamsi, Billings. 



Attleborensis, S and F. 

 (?) Fitchi, Walcott. 

 misera, Billings, 

 sub-coronata, H. and W. 

 Teucer, Billings, (sp.) 

 Vulcan us, Billings, (sp.) 

 2 sp. ? 

 Agraulos strenuus, Billings. 



var. nasutus, n. var. 

 Crepicephalus Augusta, Walcott. 



Liliana, Walcott. 

 Oryctocephalus primus, Walcott. 

 Anomocare parvum, Walcott. 

 Protypus Hitchcocki, Whitfield, (sp.) 

 (?) clavata, Walcott. 

 senectus, Billings, (sp.) 

 var. parvulus, Billings. 

 Selenopleura bombifrons, Matthew. 

 v _ _ - — nana, Ford. 



(?) tumida, Walcott. 

 Harveyi, n. sp. 

 Howleyi, n. sp. 



