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Crown of thorns is the common name of euphorbia splendens. The stems are covered with spines about an inch long. The plant flowers all year but mostly in winter.

Crown of Thorns

Crown of thorns is the common name of euphorbia splendens. The stems are covered with spines about an…

<i>Tetrapturus albidus</i>. Also called a billfish or spearfish, "the dorsal fin is low or moderately developed, and the ventrals are represented only by spines. It inhabits American waters as far north as New England in summer, and is not seldom taken in fathoms deep. The spear-fish is related to the swordfish (though of another family), and has a similar beak or sword. It attains a length of six or eight feet. In the West Indies its Spanish name is <i>aguja</i>." &mdash;Whitney, 1889

White Marlin, a Sailfish

Tetrapturus albidus. Also called a billfish or spearfish, "the dorsal fin is low or moderately developed,…

"Leaf of a nighshade (Solanum atropurpureum)." -Bergen, 1896

Nightshade Leaf

"Leaf of a nighshade (Solanum atropurpureum)." -Bergen, 1896

"Diagram of an Echinus (stripped of its spines). a, mouth; a', gullet; b, teeth; c, lips; d, alveoli; e, falces; f, f, auriculariae; g, retractor, and h, protractor, muscles of Aristotle's lantern; i, madreporic canal; k, circular ambulacral vessel; l, Polian pedicels; r, r, spines; s, tubercle; s', tubercle to which a spine is articulated; t, t, pedicellariae; u, anus; v, madreporic tubercle; x, ocular spot." -Whitney, 1911

Sea Urchin Section

"Diagram of an Echinus (stripped of its spines). a, mouth; a', gullet; b, teeth; c, lips; d, alveoli;…

"Sea-urchin (Echinus esculentus). Left side in natural state; right side with spines removed, showing the bare plates." -Whitney, 1911

European Edible Sea Urchin

"Sea-urchin (Echinus esculentus). Left side in natural state; right side with spines removed, showing…

The Hawaiian Rock Urchin (Echinometra oblongata) is a sea urchin, here "with spines in part removed to show the plates of the test." -Whitney, 1911

Hawaiian Rock Urchin

The Hawaiian Rock Urchin (Echinometra oblongata) is a sea urchin, here "with spines in part removed…

<i>Spatangus purpureus</i>. Illustration of the violet heart urchin. One half of the illustration shows the animal with the spines removed.

Violet Heart Urchin

Spatangus purpureus. Illustration of the violet heart urchin. One half of the illustration shows the…