AND OTHER FAMILIES. 155 



Hab. China. W. W. Wood. 



My Cabinet. 



Cabinet of the Academy of Natural Sciences of Philadelphia. 



Diam. 1-5, Length 2-2, Breadth 3-5 inches. 



Shell subpentagonal, angular behind, transverse, inequilateral, irre- 

 gularly swollen over the umbones, slightly compressed somewhat be- 

 fore and below the umbones, posterior slope carinate ; substance of the 

 shell thin ; epidermis wrinkled, dark brown with obsolete rays ; liga- 

 ment long and somewhat thick ; beaks slightly inflated and undulated ; 

 cicatrices scarcely perceptible posteriorly, more deeply impressed ante- 

 riorly ; cavity of the beaks shallow ; cavity of the disk impressed im- 

 mediately under the umbo ; nacre pearly white and iridescent. 



Remarks. — This species was first, I believe, brought to this city from 

 Canton by Mr Wood* about five years since. To him I owe the first 

 specimen I have seen. A younger and fine specimen I owe to the 

 kindness of an estimable friend and accomplished conchologist, Mrs 

 Corrie, who sent it to me from England about two years since, with a 

 label " From China." It closely resembles the preceding species in 

 many characters. All the specimens, however, which I have seen, 

 perhaps half a dozen, retain the distinctive characteristics — the greater 

 transverseness — the subpentagonal form — the slight compression ante- 

 rior to the umbones — the dark epidermis — the absence almost entirely 

 of rays and its want of a rich nacre — in all these it differs from the mag- 

 nifica herein described. It is usually larger than the specimen figured. 



Symphynota magnifica. Plate V. fig. 14. 



Tests subrotundd, prope nates valde injlatu, inxquilaterali, postice obtitso- 

 angulatd; valvulis tenuibus ; epidermide luted, miiltis radiis viridibus ; natibus 



* On my return from Europe I found a box of shells sent to me by Mr Wood from Canton, 

 in which were several specimens of a tuberculated Unio, which, on examination, I perceived 

 immediately to be a new species, which the distinguished naturalist, John Edward Gray, Esq., 

 of London, did me the honour, while in that city last June, to name Leanus. 



