Archive image from page 9 of Description of a new crustacean. Description of a new crustacean from the Clinton group of Georgia .. descriptionofnew00vogd Year: 1886 has its sides deflected. The space between the front of the ghi- bella and the base of the projection is somewhat depressed. The pygidium is obtusely triangular, with the front greatly arched in uncrushed specimens, but this character seems to be confined to the medium-sized specimens; the larger forms are not so much arched, and correspond in this respect to typical pygidia of C. hlumenbaehii. The axis occupies along the anter- i
Archive image from page 9 of Description of a new crustacean. Description of a new crustacean from the Clinton group of Georgia .. descriptionofnew00vogd Year: 1886 has its sides deflected. The space between the front of the ghi- bella and the base of the projection is somewhat depressed. The pygidium is obtusely triangular, with the front greatly arched in uncrushed specimens, but this character seems to be confined to the medium-sized specimens; the larger forms are not so much arched, and correspond in this respect to typical pygidia of C. hlumenbaehii. The axis occupies along the anter- ior border about one-third of the width of the tail, and gradually tapers posteriorly into an obtuse point; it is marked with about eight or nine articulations, the anterior one being slightly arched forwards, but the others are extended almost straight across it. The dorsal furrows are well defined. The pj„ lateral lobes are marked with five pairs of ribs, four of wliich are grooved and double half-way u\); they are contracted along tne dorsal fur- rows, but widen out laterally. The ribs curve downwards and backwards, and are separated caiume,,e rosimta V 1 1 11 1 (. T Vogdes. The pygi- irom eacli otiier by well-denned grooves, the dium usually , , . . '-, c- .1 iissociated with the last pair unite and form a ridge extending ifai- around the posterior termination of the axis. Geological Position.—Clinton Group, Taylor's Ridge, near Catoosa Station; and also at Dug Gap, Georgia. Among the trilobite specimens which 1 have collected in Georgia, there arc three movable cheeks and one pygidium showing a strong reseml)lance to the same parts of Calymene Clintoni as figured l)y Prof. Hall in Pal. N. Y., vol. ii, pi. 66 a, fig. 5. These fragments were found associated with two gla- bellas, having characteristics not shown by the illustrations of the species Just referred to; therefore, for the purpose of com- parison, I carried the speciihens to the American Museum, and
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