i:cHIX()Di:i{.MS OF (iUEllXSEY. 331 



AstePiaS aurantiaea (Butthorn). Deep water (Sinel). Typical star shape, 

 each ray bordered with oblong plates. Colour brick -red, or greenish, 

 but very variable, being sometimes yellow or pink. Size about six inches 

 when full grown. 



Luidia fragiliSSima (Ling-thorn). Deep water (Sinelj. Generally with 

 seven rays, which are long and narrow. As its name implies it is 

 exceedingly fragile, so that it is extremely difficult to obtain a perfect 

 specimen. Disc and rays covered with tubercles on which are six or eight 

 spines. Colour brick-red above, straw-coloured beneath. Sometimes as 

 large as two feet across. • 



ECHINID.E. 



Cidaris papillata (The Piper) . Deep water (Sinel). Rare. In this species 

 spines are done away with and large clubs substituted, an inch and a half 

 long. 



Echinus sphsera. (Common Egg-Urchin). Bordeaux. Rare in the littoral 

 but common in deep water on loose shell gravel. This species can be told 

 at a glance by its convexity and the great number of short sharp spines. 

 Coloiu' white or pink, size 4 to 6 inches in diameter. 



E. miliaris (Purple -tipped Egg-Urchin). Very common on the east coast 

 of Guernsey : less so on the west and north. About 2 inches in diameter. 

 Spines green with purple tips. Lives under stones and in rock crevices. 



E. Flemingii (Fleming's Egg- Urchin). Occasionally dredged. Eare. 

 Conical in form, with stout, sparsely -set spines, which are yellowish - 

 white with purple bases. This species occurs only in the Channel near 

 the Islands. 



E. lividus (Purple Egg-Urchin;. Common amongt rocks and in pools. 

 Bordeaux. Lihou. Castle Cornet. About 3 inches in diameter, with 

 many sharp, strong s^Dines. Colour generally deep purple, but a green 

 variety is common. I have found one with red spines at Castle Cornet, 

 and a white spined specimen at Lihou. 



E. melo (Melon Egg-I'rchin . Channel Islands (Sinel i. Closely allied to 

 the last, but melon -shaped. 



E. aCUtUS. Channel Islands Siiielj. Also closely allied, but conical in 

 shape. 



Eehinoeyamus pusillus Green Pea Urchin). Herm (Ansted). Guernsey 

 Aiisted . Rare. Very small, only half an inch across. Colour bright 

 green. It must be common somewhere on our coasts because its denuded 

 test is abundant on the shell-beach at Herm. 



Sphsereehinus brevispinoSUS. Rare in Guernsey. Frequent in Sark. 

 This species, which seems f)eculiar to the Channel Islands, is much 

 stouter than any of the preceding. Spines short, stout and very closely 

 set. Colour deep purple, but 3Ir. Sinel has a pure white specimen. 



SpatangUS purpureas (Purple Heart -Urchin;. Common in the Russel. 

 r)ften brought in by fishermen ^Wright). Colour usually purple, but 

 variable. It lives just below the surface of fine shell sand from low water 

 downwards. The spines are bent backwards so as to facilitate bur- 

 rowing. 



AmphidOtUS eordatUS (Common Heart-Urchin;. Deep water. More 

 abundant than the last (Sinel;. This is smaller than the preceding, being 

 about half the size, i.e., two to three inches. Colour usually grey-brown, 

 sometimes buff. The sfjines are more brittle than those of Spatang us. 



BriSSUS lyrifer Tlie Fiddle Heart-Urchin). Occasional in the littoral, but 

 belonging to deep water. Rare (Sinel). Small, less than two inches in 

 diameter. It is thickly covered with long curved spines. I'he ambu- 

 lacra, on the back form a St. Andrew's cross. Colour of body, red ; 

 spinee, yellowish -white. 



