FAMILY 3. SOLENACEA. 49 



This is a new genus of Solenacea introduced by Gray, and first de- 

 scribed by him in his ' Spicilegia Zoologica.' The animal having been 

 since received in spirits, a description was handed to Sowerby for inser- 

 tion in his ' Genera of Shells.' 



The shell of Glauconome is there described as " oblong-oval, thin, 

 rather ventricose, equi valve, inequilateral ; margins close ; anterior end 

 rounded, posterior somewhat acuminated ; covered with a green, thin, 

 horny epidermis, which is inflected over the margin all round ; hinge- 

 teeth in each valve three, the posterior larger, the middle tooth of the 

 right valve and posterior of the left bifid ; no lateral teeth ; muscular 

 impressions two in each valve, the anterior marginal, oblong, the poste- 

 rior subquadrate ; palleal impression with a large, broad and deep, oblong 

 sinus, obtuse at the anterior extremity ; ligament external, oblong." 



Example. 



PI. XXXI. Fig. 1 and 2. 



Glauconome Chinensis, Gray, Spicilegia Zoologica, p. 6. pi. 3. f. 13. 

 13 a. Sowerby, Genera of Shells, No. 42. 



PHOLADOMYA, Sowerby. 



Testa tenuis, subhyalina, transversa, ventricosa ; postice brevis, rotun- 

 data ; antice paululum elongata, hians, superne hiantula. Cardo 

 foveola elongato-subtrigona, et lamina marginali, quasi fulcro, in 

 utraque valva. Ligamentum externum, breviusculum, ad laminam 

 externe affixum. Impressiones musculares duae, indistincta?. Sinus 

 impressionis musculi adhaerentis pallii magnus. Umbones approxi- 

 mate 



This remarkable genus, of which little is at present known, was insti- 

 tuted by Sowerby, and is said to partake of the characters of the Phola- 



VOL. I. H 



