Notes on the Brachiopoda

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Abstract
Brachiopoda occur at several horizons in the obtusus and raricostatus zones, but they are frequently distorted or crushed, and therefore unidentifiable. Crushed Rhynchonellids belonging to two distinct species occur in bed (77 a). One form (B 45789) can be referred to Squmirhynchia (?) belemnitica Quenstedt, and has the typical coarse angular plication and squamose surface. The other form (B 45782-88) is semiplicate. The Upper Cement-Bed (82) yields well-preserved specimens of Spiriferina walcotti (James Sowerby) (B 45797, B 45780) and vars. (B 45798), also a Spiriferina resembling S. pinguis (Zieten), but with fewer plications on the lateral slopes (B 45799). Rhynchonellas occur abundantly in the Limestone with Brachiopoda (87). These include elongated, anteriorly plicated Forms with Hypothyrid beak and indistinguishable from Quenstedt's species Piarorhynchia gryphitica juvenis from the Sinemurian (B 45811). A massive globose form with a Mesothyrid beak, usually much incurved, belongs to the genus Tropiornynchia Buckman (B 45807-809). A third form resembles ‘ Rhyncnonella’ lineata Young & Bird from the Domerian (B 45806, B 45810, B 45812,B 45818-19). In the raricostatus zone a well-preserved specimen of ‘ Rhynchonella’ triplicata fronto Quenstedt (B 46308) was obtained from the Watch Ammonite Stone (99), and crushed Rhynchonellids (B 45820) from the clays above the large nodule-bed (102). A single imperfect Terebratulid (B 46309) referable to the genus Lobothyris Buckman, and resembling L. radstockiensis (Davidson) from the Charmouthian was obtained from Hummocky (103 a).

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