PLATE CXVIIl. 



SPECIFIC CHARACTER. 



Tube, or shell broad, conic, composed of sandy particles. 



Pectinaria GuiLDiNGii : testa lata, conica, ex arenulis con- 

 texta. 



Amphitrite : Cirris utrinqiie binis radiis frontalibus aureo 

 splendissimis fronte plana : membrana ciliata 

 tentaculis qui plurimis os tegentibus. L. Guild- 

 ing^ M. S. Linn. Soc. 



For our knowledge of this most interesting addition to the 

 family of Linnean Sabella, and to the family Pectinaria of the 

 Amphitrites of Lamark, we are indebted to the kindness of the Rev. 

 Lansdown Guilding, B» A. and Fellow of the Linnean Society ; a 

 gentleman resident at St. Vincents in the West Indies ; and by whom 

 it was discovered in the deep waters of the sea surrounding that 

 island. This information was communicated in a valuable paper 

 presented some time ago to the Linnean Society, and read in its due 

 course, on the I9th of March, 1821 ; and in conformity with the 

 resolutions of the Council, was deposited with its explanatory draw- 

 ing in the Archives of the Society. A few months since, the 

 Reverend author of the paper, was obliging enough to request the 

 Society, to allow the manuscript and the drawing, together with some 

 other of his communications, to be placed in our possession ; with . 

 permission to select from them, and publish in our Repository, what- 

 ever information they might happen to contain that we should deem 

 applicable to our purpose ; a favour to which the Council was pleased 



