the Genera and Species of Starfish. 1 7^ 



b. Rays 6 or 8 cylindrical. 



2. Asterias calamaria, Gray. Arms four times as long as the 

 diameter of the body, with 7 ridges of spines ; the 5 dorsal ridges 

 equidistant. 



Inhab. Isle of France, New Holland. Brit. Mus. 



c. Rays 5 — 8, elongated, sub cylindrical, with 5 or 7 series of 

 spines, the 2 lower series close together and near the ambulacra. 



3. Asterias glacialis, Linck, t. 38, 39. A. spinosa, Pennant. Rays 

 4 or 5 times as long as the diameter of the body ; spines acute. Var. 1. 

 8-rayed ; var. 2. shorter rayed ; Madeira. 



Inhab. English coast, Mediterranean. 



4. Asterias rustica, Gray. Rays 6, flat, broad ; spines short, thick, 

 truncated. 



Inhab. Valparaiso, in sandy mud, H. Cuming, Esq. This species 

 has a series of small triangular plates, pierced with a central trian- 

 gular hole, within the marginal ambulacral spines. 



5. Asterias echinata, Gray. Rays 8, twice as long as the width 

 of the body, five-sided ; central ridge of spines interrupted. 



Valparaiso, on mud, about 4 to 6 fathoms. H. Cuming, Esq. 



d. Rays 5, tapering ■ the ambulacral series of spines crowded, as if 



2 or Z-rowed ; back netted with a ridge of two or three rows of spines 

 next the ambulacral series, and then a single series of spines. 



6. Asterias Holsatica, Retz. Ast. 22. & 26. Asterias violacea, 

 Miiller, Z. D. ii. t. 46. A. glacialis, John. Rays tapering, nearly 



3 times as long as the width of the body. 



Inhab. Northern Europe. Colour very variable. 



7. Asterias rubens, Linn. Rays broad, more than twice as long as 

 the width of the body, with scattered blunt spines, spinulose at the 

 tip. 



Inhab. European ocean. Is not this only the female with eggs of 

 the former ? 



8. Asterias KatherincE, Gray. Rays 6 or rarely 5, nearly 3 times 

 as long as the width of the body ; back with scattered and crowded 

 blunt rough-tipped spines. 



Inhab. North America, mouth of the Columbia river. Lady Ka- 

 therine Douglas. 



9 Asterias Wilkinsonii, Gray. Rays 5, nearly three times as long 

 as the width of the body ; back with about 7 irregular interrupted 

 series of rather blunt rough spines, 



Inhab. Northern Africa. Sir J. G. Wilkinson. 



See also Ast. tenuispinosa, Lam. ; Ast. hispida, Penn. ; Ast. Sa- 

 varesi, Chiaje. t. 18. f. 6; and Ast. spongiosa, Fab. 



e. Body discoidal, divided at the edge into numerous sho?'t tapering 

 rays ; the series of spines near the ambulacral series rather crowded, 

 large and elongated. Heliaster, Gray. 



10. Asterias Helianthus, Lam. 20. E. Meth. t. 108. 109. Arms 



n 2 



