\ OPHO1 



areas smooth, rugulosely granulated at the d M 



rufous, beset with s:iliroii colored lete, LCIILT! li ">!), u idl \\ \\ mill. 



A/-, in Bull. S 10, Philom. 1881-'82, p. 1 

 Cape o/ G<""l Hope (Verreaux); JA/J./y./..-/-//,- (Clou 

 common. Mus. Paris. 



GYMNOIM.AX A.NAGLTP] ' lieln-. Shell ovate, sub< 

 planate; olivaceous, painted with brown -tii;. Anterior valve, 

 posterior part of the posterior valve, and lateral areas corrugated. 

 Central areas minutely sulcated at the base, the stilci incurved; at 

 aj)ices very delicately (" mollissime") striated. Marginal ligament 

 rather wide, bluish-gray (" schistaceo"). Length 1~>, width 10 mill. 

 (Rochebr. in Bull. Soc. Philom. Paris, 1883-'84, p. 33). 



Cape Good Hope. Rare. Mus. Pari.-. 



GYMNOPLAX MI:LAXOTRKI>IHJS Rochebr. Shell ovate, subcarin- 

 ate, intense chestnut colored. Anterior valve, posterior part of tin- 

 posterior valve and lateral areas of the intermediate valves radially 

 lyrate, the lyne acute, obtusely dentate. Central areas very subtly 

 rugose. Marginal ligament rather wide, chestnut colored, regularly 

 begirt with square orange spots. Length 15, breadth 10 mill. 

 (Rockebrune, in Bull. Soc. Philom. 1883-'84, p. 34). 



Cape of Good Hope. Rare. Paris Museum. 



4. Species from the Red Sea. 



ACANTHOPLEURA VA ILL A NTH Rochebr. Shell ovate elongate, 

 wide; whitish painted with olivaceous spots. Anterior valve and 

 posterior part of posterior valve granulose, and having scattered 

 conic tubercles. Intermediate valves having the lateral areas covered 

 with elongated black tubercles ; central areas rugulosein the middle, 

 anteriorly tuberculate. Marginal ligament wide, bearing whitish 

 and green subelongated, conical spines. Length 43, width 32 mill. 

 (Rochebr., Bull. Soc. Philom. 1881-'82, p. 192). 



Suez Canal (L. Vaillant). Quite common. Paris V 



TONICIA PTYGMATA Rochebruiie. Shell subelongate, much 

 elevated, obtusely carinated ; whitish with pale che>tnnt spots and 

 tawny lines; anterior valve radially striated ; lateral areas and pos- 

 terior area of tail valve strongly and deeply corrugated; central 

 areas sculptured with lamellose and undulating sulci. Marginal 

 ligament narrow, corneous, rufous. Length LM, breadth 13 mill. 

 (Rochebr. in Bull. Soc. Philom. de Paris 1883-1884, p. 33). 



Red Sea (M. Botta) ; Paris Museum. 

 7 



