THE NECKLET. 
220 . 
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 op/ia^o?, 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. Tlie 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 
SagartiadcB through Adamsia palUata and Sagartia para- 
sitica, with both of which it has obvious relations. 
T. crassicornis. 
Margarita. 
Sag. parasitica. St. Churchiae. 
Ad. palliata. Sag. miniata. 
