34 DR. T. DAVIDSON ON RECENT BRACHIOPODA. 



26. Crania japonica, Adams. 



27. Discinisca stella, Gould. 



28. Linciula anatina, Lamarck. 



29. Adamsi, Dall. 



30. Lim/ula jaspidea, Adams. 



3 1 . smaragdina, Adams. 



32. lepidula, Adams. 



16. Terebrathlina japonica, Sowerby, sp. (Plate III. figs. 7-11.) 



Terebratula japonica, Sowerby, Proc. Zool. Soc. 181(3, p. 91 ; Thes. Conch, vol. i. p. 314, pi. Ixviii. 

 figs. 7-8, 1846; Adams & Reeve, Voyage of tLe ' Samaraiig,' Mollusca, p. 71, pi. xxi. fig. 1, 1848. 



Terebratula anyusta, Adams & Reeve, Voyage of the ' Samarang,' Mollusca, p. 71, pi. xxi. fig. 2, 1848. 



Terebratiilina japonica, L. Reeve, Conch. Icon., Monogr. of Terebratula, pi. iv. fig. 16, 1860; A. Adams, 

 Ann. & Mag. Nat. Hist. 3rd ser. vol. xi. p. 98, 1863. 



Terebratulina caput -sej-pentis, var. japonica, Davidson, Proc. Zool. Soc. 1871, p. 303, pi. xxx. fig. 8. 



Terebratulina japonica, Dall, Cat. of the Recent Species of the Class Brach., Proc. Acad. Nat. Sci. 

 Philadelphia, 1873, p. 180. 



Terebratulina caput-serpentis , var. japonica, G. Duuker, Index Moll, maris Japouici, p. 251, 1882. 



Shell obloug, ovate, alnioud-shaped, widest about the middle, rounded iu front, valves 

 nearly equally and uniformly convex, no defined fold or sinus ; beak slightly incurved 

 and obliquely truncated by an incomplete circulai- foramen ; deltidial plates rudimentary. 

 Auricles in dorsal valve very small, marginal line nearly straight, inclining to the sides 

 near the hinge. Surface of valves longitudinally striated, striae numerous and radiating, 

 augmenting in number at intervals through the bifurcation of some of the ribs and by 

 the interpolation of shorter ones of variable thickness. Valves crossed by concentric 

 lines of growth. Colour light salmon or nearly white. In the interior of the dorsal 

 valve the loop is small and ring-shaped. Length 1 inch 4> lines, breadth 1 inch, depth 

 7 lines. 



Ilab. Gotto, 48 fathoms ; Tsusalei, 55 fathoms (Adams) ; Sagami Bay, Japan 

 (Doderlein). 



Obs. This species is remarkable on account of its spindle-like shape ; it is nearest related 

 to T. Crossii, and easily distinguished from the other recent species of the genus. Lovell 

 Ileeve says, in his Monograph of Terebratula, that " T. japonica is very closely allied to 

 T. caput-serpentis and is without doubt its representative in the Corean and Japanese 

 waters." I must, however, differ from Mr. Ileeve in this matter, although in 1871 I 

 expressed a similar opinion. Dr. Doderlein, it is true, dredged in Sagami Bay a specimen 

 which I could not distinguish from Linne's T. caput-serpetitls, but it differs in many 

 respects from T. japonica, which occurs in the same locality. I am, however, quite 

 prepared to concur with Mr. Reeve's statement that T. angusta, Adams & Ileeve, is only 

 a smaller form of T. japonica. Dall places T. ahijssicola, Reeve, T. angusta, Ileeve, 

 and T. Ctim'mgi, Davidson, among his synonyms of T. jajwnica. Reeve's figures of 

 T. abyssicola would hardly lead me to consider it a synonym of the above-named species, 

 and a similar doubt may be entertained with respect to T. Cumingi. 



17. Terebeatulina radiata, Reeve. (Plate VI. figs. 9-11.) 



Terebratula {Terebratulina) radiata, L. Reeve, Conch. Icoi). pi. iii. figs. 7 a~b, 1860, and Ann. & Mag. 

 Nat. Hist. 3rd ser. vol. vii. p. 173, 1861. 



Terebratulina radiata, Dall, Proc. Acad. Nat. Sci. Philadcl|)hia, p. 180, 1873. 



