xxxviii. CONCHYLIA— D/r//rE^. 



1. Glycymeris, ina;quilateralis, maculis longitudinalihus. 



inequilateral, with the colored marks disposed 

 longitudinally. 



2. pilosus, (cquilateralis maculis longitudinalihus. 



equilateral, with the colored marks disposed 

 longitudinally. 



3. undatus, maculis transversis undatis. 



with the colored marks transverse and undulate. 



4. decussatus, decussatim striata, maculis nehulosis. 



with decussate striae and clouded marks. 



5. nummarius, umbonibus tumidis, maculis sanguineis punctatus. 



the beaks tumid, covered with scarlet dots. 



40. NUCULA. 



* margine interno crenulato. 

 the inner margin toothed. 



1. Nucleus, obliqui ovata nitida. 



obliquely oval and glossy. 

 ** margine interno integerrimo. 

 the inner margin very entire. 



2. tenuis, oblique cordata IcBviuscula. 



obliquely heart-shaped and nearly smooth. 



3. rostrata, ovata, antic^ rostrata arcuata rotundata. 



oval, with the anterior side produced curved and 

 rounded. 



4. minuta, ovata, antice rostrata arcuata truncata. 



oval, with the anterior side produced curved and 

 truncate. 



