KELLIA. 83 



Kellia planulata. 



Fig. 33. 



Shell sub-oval, white, with a thin })urplish epidermis; beaks prominent. 



Kellia rubra, Gocld, Invert, of Mass. 1st cd. 60 (non auct.). 

 Kellia planulata, Stimpson, Shells of New England, 17. 



Shell niiiuite, rather thick, sub-oval, very iiiequipartitc, rather 

 compressed ; beaks rather proniineut and in contact, having before 

 them a deeply excavated, elongated, smooth areola ; ends broadly 

 rounded, especially the posterior tip ; l)asal margin scarcely curved 

 and nearly parallel with the sujierior margin ; surface 

 marked with the lines of growth, eroded at the beaks, 

 and covered with a ])ur])lish or dirty-brown, rather 

 thick, e[)iderinis. Within white and glossy; two mus- 

 cular im))ressions, and the pallial line directly con- 



. . ., , K. planulata. 



nectmg them, without any smus, ([uite percei)tible. 

 Hinge consists, in the right valve, of a narrow, erect, central tooth, 

 and an imperfect one each side, sliglitly detached from the edge 

 of the valve ; in the left valve, of a well-defined tooth on each side, 

 barely se]»arated from the edge of the valve, leaving a triangular 

 vacancy between them to receive the central tooth of the opposite 

 valve. Length, one sixth of an inch ; height, one eighth of an 

 inch ; l)readtli, one sixteenth of an inch. 



Several specimens of this minute shell were found by Mr. C. F. 

 Shivcrick in the harbor of New Bedford. I have also found it about 

 the roots of sea-weed, which seems to be its proper situation. Buz- 

 zard's Bay in three fathoms gravel {Prime and Stimpson) ; Boston 

 Harbor in hve fathoms, shelly bottom ( Stinipsou) ; Sable Island 

 (TT7///.S) ; Gull Island (Smith). 



Dr. Stimj)Son, by actual comparison with European specimens, 

 has decided this to be distinct from K. rnbra, where I formerly 

 })laced it. It is more compressed in form, and the beaks are less 

 conspicuous. 



Kellia suborbicularis. 



Shell ronntled quadrate, white, inflated, fragile, translucent; two teeth in one 

 of the valves. 



Mya suborbicu'aris, MoNT. Test. Brit. 39, 564, pi. 26, fig. 6; Linn. Trans, viii. 41. — 



DiLLW. Recent Shells, i. ^5. 

 Tellina stihorhirnlaris, TuRT. Conch Diet. 179. 

 Petricola suborbicularis, Gray, Ann. Philos. 1825. 



