220 THE NECKLET. 



For this magnificent species I am indebted to the 

 kindness of the Rev. Walter Gregor, who obtained it in 

 October last, from the lines of a deep-sea fishing-boat, and 

 forwarded it to me. It was dead, however, when it reached 

 me ; but his own careful notes and sketches, made while it 

 was alive, have enabled me, in combination with my own 

 imperfect observations, to characterize it as above. As he 

 had never seen another specimen, I can add no more parti- 

 culars of its history. 



The name of the genus I have formed from opfjuadd';, a 

 necklace of pearls, and the English appellation perpetuates 

 the same allusion. The specific name is given at the 

 discoverer's request, in honour of a lady, one of his most 

 esteemed friends. The unsullied pearly whiteness of the 

 animal, as well as its necklace, gives a peculiar propriety 

 to this name, — margarita signifying a pearl. 



The genus is aberrant in this family ; the paucity of 

 warts, and the soft and thin texture of the skin, departing 

 manifestly from the typical forms. It approaches the 

 Sagartiadce through Adamsia palliata and Sagartia para- 

 sitica, with both of which it has obvious relations. 



T. crassicornis. 

 Margarita. 

 Sag. parasitica. St. Churchise. 

 Ad. palliata. Sag. miniata. 



