1904.] NATURAL SCIENCES OF PHILADELPHIA. 555 



Tellina fabrefacta n. sp. PI. XLI, figs. 11, 12. 



Shell oblong, compressed, thin and white; equilateral, the two ends 

 about equally rounded, the upper and basal margins arcuate, the small 

 beaks but slightly projecting, opisthogyrous. Sculpture of coarse 

 concentric ridges nearly as wide as their intervals, the latter decussated 

 with delicate radial riblets, slightly cuneate in each interval. At the 

 posterior end the ridges are broken up, and in combination with the 

 radii form lozenge-shaped tubercles. The glossy interior shows a very 

 capacious linguiform and ascending pallial sinus, rounded at the end, 

 which extends decidedly past the middle of the valve, its lower margin 

 not confluent with the pallial line. In the left valve there is one short, 

 erect cardinal tooth; in the right valve two short, diverging cardinals, 

 and minute anterior and posterior laterals remote from them. 



Length 6, alt. 3.4, diam. 2.1 mm. 



Hirado, Hizen. Types No. 86,304, A. N. S. P., from No. 1,545 of 

 Mr. Hirase's collection. 



Totally unlike any other species known to me. 



Codakia bella delicatula n. subsp. PI. XLI, figs. 15, 16. 



Compared with C. bella this form is smaller, more inflated, the 

 diameter decidedly exceeding half the length, with finer, more delicate 

 sculpture. 



Length 11.3, alt. 11, diam. 6.5 mm. 



Length 10.5, alt. 11, diam. 6 mm. 



Riukiu Island. Types No. 82,048, A. N. S. P., from No. 1,307 of 

 Mr. Hirase's collection. 



Typical examples of the widespread Codakia {Jagonia) bella Conr. 

 occur in Japan, having been sent from Hirado, Hizen, by Mr. Hirase 

 (No. 1,530 of his register). It has also been reported by Dunker and 

 others as Lucina diver gens Phil., a name which Dall has shown to be 

 synonymous. Reeve's Lucina fibida is apparently a composite of 

 two species, but the Oriental form included by him and by Adams 

 and Reeve under that name is doubtless identical with C. bella Conrad. 



Cardium hungerfordi Sowerby. PI. XLI, fig. 17. 

 Journal of Malacology, VIII, p. 103 (1901). 

 A figure of this species is given for comparison with the two forms 

 following. All of them occur at Hirado, Hizen, preserving their indi- 

 viduality without intergradation, so far as the material submitted to 

 me shows. All of them are more fragile than C. papyraceum Brug., 

 which has been reported from Japan, but which I have not seen from 

 north of the Philippines. It is not unlikely that the records of Papy- 



