[Reports volI-XIII] . ^>- in - CORALS. PLATE XV. Explanation of Plate XV. Page Fig. 1. Arckceocidaris biangulata 130 la. Side Tlew of sptne. (Hare collection )lb. View of eame from Interambnlacrum pi ate. CaiboDifeioas, Upper Coal Measaree. Fig. 2. Arckceocidaris megastylus 129 2a. Spines and plates. (Sare collection )2b. CtosB-section of lateiambnlacral , Upper Coal IkleasnTes. Fig. H. ArchtBOcidaris aculeata 130 Spine. (Hare collection )Carboniferons, Upper Coal Measnres. Fig. 4. Oligoporus mutatus 126 4a. Type specimen. (Cox collection.)4b. Ambnlacral plates
[Reports volI-XIII] . ^>- in - CORALS. PLATE XV. Explanation of Plate XV. Page Fig. 1. Arckceocidaris biangulata 130 la. Side Tlew of sptne. (Hare collection )lb. View of eame from Interambnlacrum pi ate. CaiboDifeioas, Upper Coal Measaree. Fig. 2. Arckceocidaris megastylus 129 2a. Spines and plates. (Sare collection )2b. CtosB-section of lateiambnlacral , Upper Coal IkleasnTes. Fig. H. ArchtBOcidaris aculeata 130 Spine. (Hare collection )Carboniferons, Upper Coal Measnres. Fig. 4. Oligoporus mutatus 126 4a. Type specimen. (Cox collection.)4b. Ambnlacral plates (enlarged). Carboniferous, Keokuk limestone. Fig . 5. Arckceocidaris agassisi 127 Spines and plates. (Keyes collection )Carboniferous, Barlington limestone. Fig. 6. Arckceocidaris dininnii 130 Spines (After White )Carboniferons, tipper Coal Measures. MISSOURI GEOLOGICAL SURVEY. PLATE ECHINOIDS. PLATE XVI. Explanation of Plate XVI. Page Fig. 1. Meloniles mulHpora 125 la. Side view of nearly perfect specimen. (Wachsmath colli otion.)lb. Same from above. Carboniferoas, Saint Lonis Limestone. MISSOURI GEOLOGICAL SURVEY. PLATE XVI.
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