Clark. — The Echinoderins of Peru. 



PLATE 14. 



Fig. 1. Phyllophorus peruvianus. La Punta, Callao, Peru. Side view. Nat. size. 

 Fig. 2. Part of calcareous ring of Thyone gibber. Lobos de Af uera Islands, 



Peru. X 5. 

 Fig. 3. Calcareous " button " from body wall of Thyone gibber. Lobos de Afuera 



Islands, Peru. X 450. 

 Fig. 4. The same as 3, but seen from the side. X 450. 

 Fig. 5. Calcareous supporting rod of pedicel of same Thyone. X 450. 

 Fig 6. The same as 5, but seen from the side. X 450. 



