MYOCHAMA.— Plate I. 



Species 4. (Pig. 4 a, 4 b, lower specimen, and 4 c.) 



Myochama Anomioides. Myoc. testa, ovatd, ventri- 

 cosd, umbonibus subrostratis, lateribus rotundatis, ra- 

 diatim liratd, liris irregularibus, tumidkisculis, plus 

 minus obscure dichotomis ; cameo-rosed. 



The Anomia-like Myochama. Shell ovate, ventricose, 

 uraboes rather beaked, sides rounded, radiately ridged, 

 ridges irregular, somewhat swollen, more or less ob- 

 scurely dichotomous ; flesh-rose. 



Stutchbury, Zool. Journ. vol. v. pi. 42. f. 1-4. 



Myochama Stutchburyi, Adams. 

 Hab. Australia ; Stutchbury, Strange. 



This species never has the triangular development of the 

 preceding species ; it is more ventricose aud ovate, with 

 the umboes distinctly inclined to become beaked. It is 

 moreover always of a flesh-rose colour. The diagonally 

 waved ribs on the specimens figured are caused by the 

 ribbed surface of the shell on which the Myochama grows. 

 Hence the specimen attached to the Trigonia has broader 

 and larger diagonal ribs than those attached to the Pec- 

 tunculi. 



