1871.] MR. T. DAVIDSON ON JAPANESE BKACHIOI'ODA. 311 



Of the recent shell I have seen only one example, which had been 

 dredged by Mr. A. Adams at Mososeki, in 7 fathoms, mud bottom. 

 It is of an elongated oval shape, about 9 lines in length by 5 in breadth, 

 tapering towards the front, and is of a warm yellow-brown colour. 



Mr. Jeffreys is of opinion that this Lingula cannot be specifically 

 distinguished from Lingula dumortieri from the Coralline Crag of 

 Suffolk and of Belgium by any one character. He has compared 

 it with three specimens of the latter, but in every one, where the 

 outline and beak was complete, these exactly agreed with the Ja- 

 panese recent species. All (both fossil and recent) have peculiar 

 though slight and almost microscopic and close-set longitudinal lines, 

 which, of course, are more distinct in the fossil than in the recent 

 shell. 



Lingula lepidula, A. Adams. (Plate XXX. fig. 4.) 



Lingula lepidula, Adams, Annals & Mag. of Nat. Hist. 3rd ser. 

 vol. xi. p. 101, 1863. 



This is a small oval- shaped species, tapering a good deal at the 

 beaks, about 4 lines in length by 2 in breadth. Iu colour it is 

 yellowish, slightly tinted with green. Mr. Adams observes that it 

 is as small as L. semen, and shaped like L. ovalis. 



Hab. Mr. A. Adams dredged several examples in the inland sea, 

 or, as the Japanese call, it Seto-Uchi (Akasi) in ten fathoms, mud. 



Family Craniid.e, Dav. 

 Genus Crania, Retz, 1/81. 



Mr. Jeffreys informs me that it was Philipsson, and not Retz or 

 Retzius, who first proposed the generic name of Crania (' Disser- 

 tatio historico-naturalis, sistens nova Testaceorum genera:' Lundse, 

 1788). But Mr. Dall assures me that Retz had done so some years 

 before Philipsson. 



Crania japonica, A. Adams. (Plate XXX. figs. 6, 6 a.) 



Crania japonica, Adams, Annals & Mag. of Nat. Hist. vol. xi. 

 p. 100, 1863. 



This is a small species, in which the central pair of muscular pro- 

 minences are very much developed. All the valves found by Mr. 

 Adams are a little worn. 



Hab. From deep water, 71 fathoms, among the Gotto group of 

 islands. 



Family Discinid^e, J. E. Gray. 



Genus Discina, Lamarck. 



Discina stella, Gould. (Plate XXX. fig. 5.) 



Discina stella, Adams, Annals & Mag. of Nat. Hist. 3rd ser. vol. xi. 

 p. 100, 1863. 



Hab. Seto-Uchi (Akasi), 1 7 fathoms ; Tsu-Sima, 1 7 fathoms ; 

 Tabu-Sima, 26 fathoms, on coral bottom ; Tou-Sima, in 25 fathoms. 



