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I refer to the well known Lingula of the Lingula flags, lately, in consequence of some slight differences, placed in the new genus Lingulella. Practically, it belongs to the same great generic group as the Lingula, which is to be found at the present day upon your own shores and those of many other parts of the world.

"Lingula flags" of Dolgelly, and Ffestiniog; N. Wales. Hymenocaris vermicauda, Salter. A phyllopod crustacean. Lingulella Davisii, M'Coy. a. One-half natural size. b. Olenus micrurus, Salter. Next below the Tremadoc slates in North Wales lie micaceous flagstones and slates, in which, in 1846, Mr.

I refer to the well-known Lingula of the Lingula flags, lately, in consequence of some slight differences, placed in the new genus Lingulella. Practically, it belongs to the same great generic group as the Lingula, which is to be found at the present day upon your own shores and those of many other parts of the world.

In the most primitive order that of the INARTICULATE brachiopods the two valves are held together only by muscles of the animal, and the shell is horny or is composed of phosphate of lime. The DISCINA, which began in the Algonkian, is of this type, as is also the LINGULELLA of the Cambrian.

I refer to the well-known Lingula of the Lingula flags, lately, in consequence of some slight differences, placed in the new genus Lingulella. Practically, it belongs to the same great generic group as the Lingula, which is to be found at the present day upon your own shores and those of many other parts of the world.