Norian brachiopods (4 species) and lamellibranchs (25 species, 2 subspecies) from the Asfal and Sumra Formations (Elphinstone Beds) of the Jebel Hagab area, Oman, Arabia, are critically identified, new morphological features being described. The fauna shows considerable resemblances to those of the same age from Spiti, Central Himalayas, and Indonesia, notably Misol. Brachiopods described include Hagabirhyiichia arabica gen. et sp. nov., and Misolia lenticiilata sp. nov. New species and subspecies of lamellibranchs are Modiolus omanensis, ludopecteu amusiiformis, I. clignetti (Krumbeck) asperior, Palaeocardita trapezoidalis (Krumbeck) leesi, and Thiacia proavita. Structural colour-banding in ludopecteu is discussed.

Norian brachiopods (4 species) and lamellibranchs (25 species, 2 subspecies) from the Asfal and Sumra Formations (Elphinstone Beds) of the Jebel Hagab area, Oman, Arabia, are critically identified, new morphological features being described. The fauna shows considerable resemblances to those of th...