274 



Mr. J. Miers on the Styracese, 



It was taken by Mr. Robertson " among some fibres of a nest 

 of Lima Mans ; it was always covered with mud, which is difficult 



Cuma unguiculata. 

 i, second gnathopod ; m, third pereiopod ; m, posterior pleopod. 



to detach, and sluggish ; it frequently pushes its tail up between 

 its legs, thrusting it out below the head/^ 



This species may be readily distinguished from any other by the 

 shortness of the peduncle of the posterior pair of pleopod a and 

 the strongly unguiculate character of the terminal spine on the 

 pereiopoda, from which latter circumstance the name of the 

 species is derived. 



XXX. — On the Natural Order Styracese, as distinguished from 

 the Symplocacese. By John Miers, E.R.S., F.L.S., &c. 



[Continued from p. 146.] 



I HAVE adopted the opinion of Cavanilles in considering Stri^ 

 gilia distinct from Styrax, with which it has been associated by 

 later botanists ; the reasons for this conclusion will be presently 

 stated. The former genus will comprise all the South American 

 species of Styrax enumerated by DeCandolle. The Mexican species 

 of the genus, from the imbricate aestivation of their corolla, appear 

 to be congeneric with the North American and European forms. 

 In looking over the Hookerian herbarium, I noticed two or 

 three species which I had no hesitation in referring to the Cyrta 

 of Loureiro, — a genus placed by Endlicher as an aberrant form 

 of the Order, and by DeCandolle excluded from the family solely 



