Superfaniils/ K Y T I j- A G E A 



Family Llytiliclae. 

 Gemis MODIOLUS Lamarck. 

 Section Brachj'dontes Swains on. 



'■t/ 



MODIOLUS (BRAOHYDOIITSS) GUPPYI Dall . 



Modiolus (BrachTdontes) GwDpvi Dall, 189 8, Trans. V/asner ?'ree 



Inst. Sei., Philadelphia, vol. 5, pt. 4, p. 794, pi. 35, 

 fiR-. 16. 



Desori ptior. .- "Shell small, thin, delicste, radiately num- 

 erously rllDbed, the ribs hut seldom dichotomous, general form as 

 in n. grammatns . [Dall (l)J , hut shorter and more rounded, the 

 surface frequently concentrically faintly undulated, inner dorsal 

 margin shraply crenulate, the rest of the shell margin almost 

 smooth, basal ena of the valve rounded, dorsal angle obsolete. 

 Alt. 8.n, max. lat., 4.7, diam., 2.5 mm." 



"This differs from the last fn. S'rariimatus Dh1]J in its more 

 delicate and less dichotomous ribbing, its more rounded, thirjier, 

 and less angular shell, and in the absence of crenulations over 

 most of the margin, due to feebleness of the sculpture." (Dall, 

 1898). 



(1). Idem, P. 794, pi. 30, fi.~. 2. 



Type loo ality. - Bovvden, Jamaica. 



