108 ECHINODERMATA. 



careful treatment, and particularly from being kept cool, it became suf- 

 ficiently vigorous, and proved a fine example of the form of its kind. 

 Star-fish are generally extremely impatient of heat. Many perish, appa- 

 rently from nothing but the temperature of our apartments exceeding 

 that of the sea. 



These animals usually ascend the sides of the vessels devoted to 

 their preservation. They quit then- hold, if enfeebled, lie reversed be- 

 low, and die. 



Plate XIX. 



Fig, 7. Asterias endeca, with eight rays, upper surface. 



8. Under surface. 



9. Another specimen, with nine rays, reduced. 



Plate XXII. 



Fig. J . Asterias endeca, expanding eight inches. 

 2. Compartment of the skin, enlarged. 



Plate XXIII. 



Fig. 1 . Asterias endeca, purple specimen expanding above seven inches. 



2. Compartment of the skin, enlarged. 



3. Ocular speck, enlarged. 



4. Madreporiform tubercle amidst four tufts, with two at some dis- 



tance, enlarged. 



5. Portion of the same, magnified. 



6. Ova near the size of nature. 



7. Group of the same, enlarged. 



§ 6. AsTERUS (Solaster) papposa.— Plates XXIV., XXV., XXVI. 



This is one of the larger, the more singular, and, at the same time, 

 one of the most beautiful of the genus dwelling in the Scotish seas. 

 But, compared with those abeady described, its appearance is so remark- 

 able, and it is so unlike them in all its features, that many less skilful 

 might refuse to admit its kindred to the tribe. The formation of the 



