TAPES.— Plate X. 



compressed, anteriovly abruptly sloping, poste- 

 riorly attenuately ]5ro(luced, chalk-white, covered 

 with a smooth shining ash-coloured horny epidermis, 

 eroded at the uniboes, then irregularly slightly 

 plicated. 

 Ilab. Arctic Seas. 



A distinct and quite abnormal form of Tapes, if Tapes 

 at all. 



Species 53. (Fig. a, b, Mus. Cuming.) 



Tapes floridella. Tap. testa subanguste ovatd, utrin- 

 que suboblique atteiiuatd, medio turgkid, fidvescente- 

 lacted, griseo profuse reticulato-lentiginosd, plus minus 

 distincte intense sex-radiatd, conceiitrice dense subtililer 

 corrugato-Uratd. 



The blooming Tapes. Shell rather narrowly ovate, 

 somewhat obliquely attenuated on either side, swollen 

 in the middle, fulvous cream-colour, profusely reti- 

 culately freckled with grey, more or less distinctly 

 darklv six-rayed, concentrically densely finely wrinkle- 

 ridged. 



Venus Jioridella, Deshayes, Anim. sans vert. vol. vi. 

 p. 865. 

 Tapes floridella, Deshayes. 



Hah. ? 



Of a peculiar form, minutely elaborated in respect both 

 of colour and sculpture. 



cosd, fultescente-lacled, ferrugineo el violaceo-griseo 

 varie nebulald et reticulatd, pallide radiatd, latere 

 antico conceutrice teniie Urate et sulcata, postico lav/i- 

 gato. 



The petal-like Tapes. Shell rather narrowly ovate, 

 ventricose, fulvous cream-colour, variously clouded 

 and reticulated with rust and violet-grey, faintly 

 rayed, anterior side concentrically iinely ridged and 

 grooved, posterior smooth. 



Venus pet alina, Lamarck, Anim. sans vert. vol. vi. p. 365. 

 Venus Beudanti, Payraudeau. 

 Tapes pelalina, Sowerby. 



TIab. Mediterranean Sea. 



Resembling the preceding species in general aspect, but 

 it will be found on comparison that T. petalina is smooth 

 on the posterior half of the shell. 



Species 54. (Mus. Cuming.) 

 Tapes petalina. Tap. testa subanguste ovatd, veiitri- 



Species 55. (Mus. Cuming.) 



Tapes tenuistkiata. Tap. testa abrupte cuneiformi, 

 postice subexpansd, albidd, pallide rosaeeo-cinereo la- 

 tiradiatd, concentrice lirald, liris confertis, hie illic 

 confluentibus, ad latus posticum obtuse planatis. 



The finely-striated Tapes. Shell abruptly wedge- 

 shaped, posteriorly rather expanded, whitisli, broadly 

 rayed with pale pinkish asli-colour, concentrically 

 ridged, ridges close-set, here and there confluent, 

 obtusely flattened on the posterior side. 



Sowerby, Thes. Conch, vol. i. p. 6S7. pi 148. f. 78, 79. 



Hab. ? 



A very delicately-coloured species, without any indica- 

 tion of marking. 



