[ami] outliers of the OTTAWA PALAEOZOIC BASIN 1S5 



articulosus, B., C. Inœqualis, B,, Cleiocrinus laaynificns^ B., C. regius, B., 

 Dendrocrinus gregarius, B., D. humilis, B., D. proboscidiatiis, B,, D. rusti- 

 cus, B., D. similis, Bill., Glj/j^tocrinus parvus, Bill., 6^^. quinquepartiUis, 

 Bill.,.(r. ramulosus, Bill., Meterocrinus Canadensis^ Bill., i/. tenuis, B., 

 Hyhocrinus conicus, Bill., ^. tumidus, Bill., locrinus subrrassus, Meek and 

 Worthen, Taxocrinus elegans, Billings, T. /^ryts, Bill., Palœocrinus angu- 

 ^a^ws,Bill., P. pidehellus, B., P. rhombiferus,^., Periglyptorrinus BilUngsi, 

 "Wachsmuth, Porocrinus conicus, B., Reteocrinus stellar is, Bill. 



Of the Cystoidea we note the following : — Amygdalocystitesflorealis, 

 Billings, A. florealis, v. lœvis, W. E. Billings, A. radiatus. Bill., A. tenui- 

 striatus, Bill., Ateleocystites Huxleyi, Bill., Comarocystites punctatus, Bill., 

 Glyptocystites multiporus, B., Lichenocrinus crateriformis, Hall, Pleurocys- 

 tites elegans, B., P.filitextus, B., X. squamosus, B., and L. Jilitextus, Bill. 



The AsTEROiDEA comprise : — Agelacrinites BilUngsi, Chapman, J.. 

 Dicksoni, Bill., Cyclocystoides Halli, Bill., Edrioaster Bigsbyi, Bill., Palas- 

 terina stellata. Bill., Petraster rigidvs, Bill., Stenaster pvlchellus, B., >Si. 

 Salteri, Bill., Tœniaster cylindricus. Bill. 



The Bryozoa are very abundant and comprise, probably, not less 

 than lUO species. Of these some fifty have already been identified and 

 recorded, and amongst others include : — Amphxopora discoidea, James sp., 

 Arthroclema imlchellwn, Bill, Asteroporites Ottawaënsis, Lambe, Batos- 

 toma Ottaivaënse,Foord, Constellaria florida, v. plana, JJlrich, C. anthe- 

 loidea, Hall, Diplotrypa regularis, Foord, D. Whiteavesii, Nicholson, 

 Heterotrypa solitaria, Ulrich, Homotrypa similis, Foord, Alone typella 

 Trentonensis, Nich., Afonticulipora BilUngsi, Foord, Al. Westoni, Foord, 

 A£. parasitica, Ulrich, Prasopora Selwyni, Nich., P. affinis, Foord, 

 P. oculata, Foord, Pachydictya acuta. Hall, Ptilodictya falciformis, 

 Nicholson, P. pavonia, d'Orbigny, Escharopora Trentonensis, Hall, Spa- 

 tiopora areolata, Foord, Rliiitidicfya paupera, Ulrich, Solenopora compacta, 

 Billings. 



Brachiopoda. These, for the most part very minute fossil remains, 

 are very abundant throughout the Trenton formation, and besides the 

 three eminently characteristic as well as prolific forms, viz.: — OrtMs (Dal- 

 manella) testudfnaria, Dalman, Leptœna (Plectambonites) sericea, Sower- 

 by, and Strophomena iJiafincsquina) alternata, Conrad, we have the 

 following forms of brachiopoda noticed and identified from various 

 localities in the Ottawa Paheozoic Basin :—Orbiculoidea lamellosa. Hall, 

 (= Discina Circe, Billings), Schizotreta Pclopea^ Billings sp., Lingula 

 Philomela, Billings, L. (Glossina) riciniforwis, Hall, L. attenuata. Hall, 

 Trematis Ottawaënsis, Billings, Pholidops subtruncatus. Hall, Rafines- 

 quina deltoidea, Con., Strophomena planumbona,'B\\\\x)gf^, S. Thalia, BiW- 

 ings, Stro2Jh. BilUngsi, W. & 8., (= S. recta, Bill.), Skenidium Alerope, 

 Billings, Orthis {Plœsiomys) Iphigenia, Bill., Orthis (Plœsiomys) subquad- 

 rata, Hall, Orthis {Hebertella) occidentalis, Hall, 0. (H.) Laurentina, 



