5U JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. XI. 



A very minute shell, which I cannot exactly match with any portrayed 

 and described in Pilsbry's exhaustive collaboration of the genus. It comes 

 near to P. umbdicata, D'Orb., from Cuba and Florida, but would seem even 

 more tumid than that species, while it is entirely smooth, with no impressed 

 lines ; the shell is perforate, solid, white, shining, very smooth, with five 

 whorls ; whorls extremely tumid and ventricose, impressed at the sutures, 

 painted with a sprinkling of minute red dots, these most profuse at the base 

 of the shell ; a little below the lower half of the last whorl there is a trans- 

 verse row of a few somewhat square, dark red spots; the mouth is oval, outer 

 lip simple. 



Ten specimens, but mostly not full-grown. 



26. Tellina (Tellinella) thymapes, n. sp. PI. Fig. 9. 



T. testa delicatula, tenui, alba, subtrapeziformi, compressa, concentric© 

 multi-costulata, margine dorsali declivi, serrulato, latere antico expanse 

 rotundato, postico truncatulo, margine ventrali latus ad posticum contractor 

 deflexo. Long. 13, lat. 20 mm. 



A most delicate species, resembling in texture, but not in form, such 

 species as Tellina perplexa or T. lyra, both of Hanley. The shell is trape- 

 zium-shaped, compressed, delicate white, thin, regularly concentrically closely 

 ribbed, the dorsal margin sloping slightly, thus recalling the genus Tellidora 

 (e.g., T. crystallina), serrulate both posteriorly and anteriorly, the anterior 

 side beiDg roundly expansive, somewhat truncate posteriorly, the ventral 

 margin contracted towards the posterior side. 



The specific name is from the Greek Ov/A^nf, 'delicate.' 

 EXPLANATION OF PLATE. 



(The above paper appeared in the Proceeding- of the Malacological Society, Vol. IT, Paft B? 

 Man. Conch-, ser. I, vcl. x, p. 162, etc) 



