Radiata. 3813 



Family 2. — Echinidce. 



Fleming's Egg Urchin, Echinus Flemingii. First discovered in 

 Zetland. One dredged in Orkney in 16 fathoms, by Mr. R. Heddle. 



Common Egg Urchin, E. esculentus, (E. sphaera). Abundant. 



Purple-tipped Egg Urchin, E. miliaris. Rare. 



Silky-spined Egg Urchin, Echinometra Drobachensis, (Echinus 

 neglectus). Found in Zetland by Forbes and Goodsir. One in Ork- 

 ney, found by Mr. R. Heddle. 



Family 3. —Scutellida. 



Cake Urchin, Echinorachinus placenta. One obtained near Fou- 

 lah, in Zetland, by Prof. Jameson. 



Green Pea Urchin, Echinocyamus pusillus. Tolerably common. 



Family 4. — Spatangida. 



Purple Heart Urchin, Spatangus purpureus. Of doubtful oc- 

 currence. 



Common Heart Urchin, Eckinocardium cordatum, (Amphidotus 

 cordatus). Common. One, of very large size, found by Mr. R. Hed- 

 dle, in Ronsey. 



Rosy Heart Urchin, E. ovatum, (A. roseus). Hitherto found only 

 in Zetland. 



Fiddle Heart Urchin, Brissiopsis lyrifera, (Brissus lyrifer). Ob- 

 tained in Zetland by Prof. Melville. 



Order V. — Cirrho-vermigrada. 



Family 1. — CuveriidcB. 



Snail Sea-cucumber, Psolus phantapus. Pretty common. 

 Short Psolinus, Psolinus brevis. Discovered in Zetland by Forbes 

 and Goodsir. 



Family 2. — Pentad ides. 



Great Sea-cucumber, Pentacta frondosa, (Cucumaria frondosa). 

 Common in Zetland. 



Long Sea-cucumber, P. fusiformis, (C. fusiformis). Occurs in 

 Zetland. 



Milk-white Sea-Girkin, P. lactea, (Ocnus lacteus). Occurs in 

 Zetland. 



Angular Sea-cucumber, P. penlactes, (Cucumaria pentactes). Rare 

 in Orkney. 



