556 PROCEEDINGS OF THE ACADEMY OF [July, 



raceum from Japan were based upon specimens of this species or of 

 C. anncB. 



C. hunger fordi is flesh-colored, either almost imiform or with narrow 

 darker concentric zones alternating with wider pale zones. The 

 shell figured measures, length 10, alt. 9, diam. 6.5 mm. It is from 

 Hirado, Hizen, No. 80,601, A. N. S. P., from No. 1,234 of Mr. Hirase's 

 collection. 



Cardium hungerfordi undatopictum n. subsp. PI. XL, figs. 14, 15. 



Shell extremely thin, similar in shape to the preceding or with the 

 posterior end longer. Sculpture as in C. hungerfordi, except that very 

 low riblets are visible across the whole valve near the basal margin. 

 Concentrically streaked and profusely marked in zigzag pattern with 

 flesh tint on a whitish ground, the beaks dark. Interior more distinctly 

 marked with waved or zigzag concentric streaks of flesh color or crim- 

 son; radially finely grooved, and the inner margin is distinctly crenu- 

 late in the middle as well as toward the ends. 



Length 16,5, alt. 16.5, diam. 10 mm. 



Hirado, Hizen. Types No. 80,521, A. N, S, P., from No. 880 of 

 Mr. Hirase's collection. 



This form is much larger than C. hungerfordi Sowb. Ill, equally thin, 

 but with another pattern of color, much like that of C. amice Pils., 

 from which it differs in sculpture. As in other forms of the group, there 

 is more or less minute roughening of the ends by fine asperities. The 

 marginal crenulation of this form is a feature strongly differentiating 

 it from C. hungerfordi and stigmaticum. 

 Cardium hungerfordi stigmaticum n. subsp. PI. XLI, figs. 13, 14. 



This is a small, thin, nearly equilateral white species, with the apex 

 of each valve red-brown, a vertical streak of the same color on the con- 

 vexity of the valve below it, and sometimes some faint stains of the 

 same at the sides. The white interior shows the median streak, with 

 usually side streaks and often some mottling or a streak along the 

 pallial line. The sculpture consists of about 9 rather strong but low 

 rounded ribs on the posterior slope, divided into two sets by a shallow, 

 wide radial valley, the last rib dorsally having a linear riblet on each 

 side of it. The median portion of the valve is almost smooth, showing 

 the faintest traces of fine riblets near the lower margin ; but where the 

 lower passes into the anterior slope the ribs are decidedly stronger, 

 and denticulate the edge. There is a minute punctulation at both ends 

 in perfectly fresh shells. The right valve has anterior and posterior 

 lateral teeth, the anterior wanting in the other valve. 



Length 11.3, alt. 12, diam. 7,3 mm. 



