木刻, 木材雕刻, 發表于1897年 插畫檔

Echinoderms, left side: 1) Crinoid (Pentacrinus caput Medusae), calyx without arms seen from above (a), anus (b); 2) Sea lily (Antedon rosacea); 3) Sea cucumber (Scotoplanes globosa, or Scotoplana globosa); 4) Sea cucumber (Cucumaria), with outstretched tentacles (T), and ambulacral tube feet (Af); 5) Sea cucumber (Holothurian), sclerites; 6) Sea cucumber (Leptosynapta inhaerens, or Synapta inhaerens). Right side: 1) Heart urchin (Spatangoida, or Hemiaster philippii); 2) Two-forked Pedicellaria (a), open (b); 3) Starfish (Echinaster sentus); 4) Brittle star (Ophiactis virens); 5) Tooth structure of the sea urchin Echinus esculentus, overall view (a), details (b - d); 6) Sea urchin (Calveriosoma hystrix, or Asthenosoma hystrix); 7) Heart urchin (Schizaster), bully side, mouth (o), pores of the ambulacral feet (p), anus (A); 8) Brittle star (Ophiothrix fragilis), the arms cut off; 9) Shell of the sea urchin Echinus esculentus, half of the spines removed. Wood engravings, published in 1897.