328 



MOLLUSCOIDEA BRACHIOPODA 



SUB-KINGDOM V 



Harttina, Hall and Clarke. Centronclla-]ike shells with a high dorsal 

 median septum and the descending branches of the loop laterally fringed with 

 irregularly set spinules. Carboniferous ; North America and Brazil. 



? Cryptacanthia, White t and St. John. Upper Carboniferous ; North 

 America. 



Sub-Family C. TEREBRATULINAE. Dall. 



A median un\ 



coiled arm exists in recent 



Terebratulidae with a short loop, 

 genera. Devonian to Recent. 



Of this large sub-family only a few of the more important genera can be briefly 

 considered here. 



Dielasma, King (Epithyris, King), (Fig. 549). To the divergent crural 

 plates is attached a shallow, often quite long, anteriorly acuminate hinge- 



FIG. 549. 



Dielasma elongata, Schloth. sp. Permian ; Hum- 

 bleton, England. A, Dorsal and anterior views, 

 Vl- -B, Interior of conjoined valves, greatly en- 

 larged (after Davidson). 



FIG. 550. 



Terebratulina sub- 

 striata, Schloth. sp. 

 Upper Jura ; Nat- 

 theim, Wiirtem- 

 berg. l/i. 



FIG. 551. 



Terebratiila Phillipsi, 

 Morris. Middle Jura ; Eg, 

 near Aarau, Switzerland, i/j. 



Devonian to Permian ; 



plate carrying the muscles of the dorsal valve. 

 Europe, India, and America. 



Eunella and Cranaena, Hall and Clarke. Dielasmas without the adherent 

 myiferous hinge - plate. Devonian ; North 

 America. 



Beecheria, Hall and Clarke. Smooth-shelled 

 Dielasmas without dental plates, but with the 



FIG. 552. 

 Liothyrinu vitrea, Linn. sp. Recent ; Mediterranean. 1/1- 



FIG. 553. 



Pygope, diphya, Colonna. Tithonian; 

 Trent, Tyrol. 1/1- 



myiferous plate wholly attached to the dorsal valve. Carboniferous ; North 

 America and India. 



Dielasmina, Waagen. Plicated Dielasmas. Carboniferous ; India. 



