180 



Mr. J. E. Gray's Synopsis of 



33 or 34, about J the length of the width of the body, with three 

 equidistant series of short blunt spines. 



Inhab. Guasco, Chili, Say. Valparaiso, H. Cuming, Esq. 



11. Asterias Cumingii, Gray. Arms 30 or 31, very short, not 

 -j^j as long as the diameter of the body, conical, with blunt spines. 



Inhab. Hood's Island, on rocks at spring tide. H. Cuming, Esq. 



12. Asterias multiradiata, Gray. Arms 22 or 24, cylindrical, 

 elongated, tapering at the ends, \ longer than the diameter of the 

 body ; the dorsal series of spines rather longer and more compressed. 



Inhab. Hood's Island. H. Cuming, Esq. 



2. Tonia, Gray. 

 Skeleton netted with a series of crowded small blunt mobile spines 

 on the sides of each ossiculum ; ambulacra bordered with a crowded 

 series of subulate spines, and without any triangular pierced pieces 

 within them. 



1. Tonia atlantica, Gray. Rays 5, more than twice as long as 

 the width of the body; back with 9 series of cross bands. 

 Inhab. Valparaiso, on rocks at low water. H. Cuming, Esq. 



Sect. 2. The ambulacra with only two rows of feet. 



Fam. 2. Astropectinid^e. 

 Back flattish, netted with numerous tubercles, crowned with ra- 

 diating spines at the tip, called Paxilli. 



A. The margin of the rays ciliated with a series of simple elongated 

 spines, the paxilli or crowned tubercles regularly radiating. 



a. The rays edged with a series of large regular tubercles, which in- 

 crease in number as the animal grows. 



1. Natjricia, Gray. 

 The ambulacral spines broad and ciliated ; 2 series of tesserae be- 

 tween the angles of the arms and the mouth beneath. Asiatic. 



1. Nauricia pulchella, Gray. Seba, iii. t. 8. f. 7. a. b. not good. 

 Rays 5, half as long as the width of the body, gradually tapering, 

 lower series of marginal tubercles with a series of broad flat spines 

 on the upper margin of each. 



Inhab. China? Japan ? 



2. Astropecten, Linck. Fringed Star Fish. 

 Ambulacral spines simple, linear, without any tesserae between 

 the marginal tubercles near the mouth and angles of the arms. 

 1. Body pentagonal ; rays short. 



1. Astropecten corniculatus, Linck. t. 27. &t. 36. f. 63. 

 Inhab. . Perhaps a variety of the next. 



2. Astropecten polaris = Asterias polaris. Sabine, Append. Parry's 

 Voy. 223. t. 1. f. 2, 3. 



Inhab. North Sea. 



