. Cambrian Brachiopoda. Brachiopoda, Fossil. 340 CAMBRIAN BRACHIOPODA. Linnarsson [1876, p. 25] gives the following description of the dorsal valve of this species: Shell small, transversely oval, broadest about the middle. Hinge-line straight, shorter than the width of the shell; cardinal angles rounded. Shell substance apparently corneous. Surface marked with numerous sharply marked, concentric lines of growth. Length, 3 mm.; breadth, 4 mm. In some material received from Andrarum, Sweden, I found what appear to be the ventral and dorsal valves of this species associated with Micromitra (IpJi
. Cambrian Brachiopoda. Brachiopoda, Fossil. 340 CAMBRIAN BRACHIOPODA. Linnarsson [1876, p. 25] gives the following description of the dorsal valve of this species: Shell small, transversely oval, broadest about the middle. Hinge-line straight, shorter than the width of the shell; cardinal angles rounded. Shell substance apparently corneous. Surface marked with numerous sharply marked, concentric lines of growth. Length, 3 mm.; breadth, 4 mm. In some material received from Andrarum, Sweden, I found what appear to be the ventral and dorsal valves of this species associated with Micromitra (IpJiidella) ornatella (Linnarsson) and Acrotreta socialis von Seebach. The ventral valve shows a well-defined false area on each side of a triangular opening. The broken edge of the pseudodeltidium is shown on the side of the upper end of the fissure, but its form and depth can not be determined. This species is related to Micromitra {Paterina) labradorica (Billings), differing from it in having a less elevated ventral valve, radiating ridges on the surface, and being more uni- formty smaller in size. It is evidently a rare form, as only three specimens were met with in brealdng up a large quantity of rock. Formation AND LOCALITY.âMiddle Cambrian: (8w) Limestones of the ParadoxiWes/orcMommm zone, at Andra- rum, 20 miles ( km.) northwest of Simi-ishamn, Province of Christianstad; (320f) limestone at Andrarum, 20 miles ( km.) northwest of Simiishamn, Province of Christianstad; and (320u [Linnarsson, 1876, p. 25]) strata with Agnostus Ixvigatus at Ostra Rynninge, in Nerike; all in Sweden. (16h) Limestones of the Paradoxides forchhammeri zone at Borregaard; and (16j) limestones of the Paradoxides forch- hammeri zone at Laesa8.; both on Bornholm Island, Denmark. Matley [1902, p, 146] has identified this species from the following locality:" Upper Cambrian: (304b) Lower part of the "^Vhite Leaved Oak" shales (the zone of Polyphyma), Malvern Hills, between Hereford
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