112 SAN DIEGO SOCIETY OF NATURAL HISTORY 



ULRICH (E. O.) and BASSLER (Ray S.) — Continued 



laciuiata (Beyricliia laciinata J. & H.), T. (Kiesoivia) mnmillosa (Beyr'icliia mamillosa 

 Krause), T. marcliica (B. marchica Krause), T. marclilca angustata (B. marcliica var. 

 angustata Krause), T. marcliica lata (B. marcliica var. lata Krause), T. palmata 

 (Beyricliia palmata Krause), T. cjuaJrilirata (Beyricliia quadrilirata H. k W.), T. 

 (Kiesov:ia) radians (B. radians Krause), T. riheiriana (B. riheiriana Jones), T. sim- 

 plex (T. rjuadrilirata var. simplex Ulrich), T. siibquadrans Ulrich. 



Ceratopsis Cjenotype Beyricliia Cliamhcrsi Miller. 



The genus includes C. rohnsta Ulrich, C. interw.edia ITlricIi, (-'. oculifcra Hall, all 

 Upper Ordovician species, and (-". Iiastata (Beyricliia liastata Barr.) 



Stenobolina Genotype Beyricliia ciliata Emmons. 



Group of Ctenoholina ciliata. 



Ordovician species: 



Ctenoholina alata I'Irich, C. bispinosa Uirich, C. ciliata Emmons, C. curta (C. ciliata 

 var. ciirta Ulrich), C. Duryi (Beyricliia Duryi Miller), C. emaciata (C. ciliata var. 

 emaciata Ulrich), C. Gtiillieri (B. Guillieri Tormelin), C. Ilammelli (B. Hammelli 

 Miller and Faber), C. ohliqua Ulrich, C. oblonga (Eniomis oblonga Steusloff). 



Silurian species: 



Ctenoholina granosa Ulrich, C. punctata Ulrich. 



Devonian species: 



Ctenoholina papillosa Ulrich. 



Group of Ctenoholina suhcrassa. 



Ordovician species: 



Ctenoholina crassa I'lricli, (,'. jitlcrata I'Irich, C. impressa (Entomis impressa Steus- 

 loff), C. major (Bollia major Krause), C. minor (Bollia minor Krause), C. suhcrassa 

 Ulrich, C. umhonata (Entomis umbonata Steusloff). 



Silurian species : 



Ctenoholina auricularis (Bollia auricularis Jones). 



Devonian species: 



Ctenoholina mimima Ulrich. 



Mississippian species: 



Ctenoholina loculata Ulrich. 



Drepanella. Genotype D. crassinoda I'lrich. 



Ordovician species : 



Drepanella ampla Ulrich, D. higeneris Ulrich, D. crassinoda nitida Ulrich, D. 

 elongata Ulrich, D. macra Ulrich, D. Richardsoni (Beyricliia Ricliardsoni Miller), D. 

 Kicliardsoni canadensis IHrich. 



This wholly American genus is remarkable for the extreme variability of the nodes 

 within the central area of the valves. 



Scofieldia new genus. Genotype Drepanella hilaternlis Ulrich. 



Treposella no^. gen. genotype Beyricliia I.yoni Ulrich. This genus proposed for a 

 link in the evolution of Hollina from Beyrichia. 



Hollina new genus. Genotype Ctenoholina insolens Ulrich. 



Devonian species: 



Hollinia antespinosa Ulrich, H. armata Ulrich, //. cavimnrginata Ulrich, //. informis 

 Ulrich, H. spiculosa Ulrich. 



All these species were described as species of Ctenoholina by Ulrich. 



Carboniferous species: 



Hollina granifera (Bollia granijera Ulricli), //. radiata (Beyricliia radiata J. & K.), 

 variety cestriensis Ulrich, H. lougispina (Beyricliia longs pina J. k K.), //. emaciata 

 (Beyricliia f emaciata' U. & B.). 



The authors include under this genus Beyricliia Kolmodini and B. tricolliiia Uirich. 



