75 171 



Distribution. — Ofï Levuka, Fiji Isis. (Edg. Smith). 



Tiie fresh, left valve obtained from the Gulf of Siam is about double the size 

 of the right valve from the Fiji Islands on which Edg. Smith founded the species, 

 but it exactly agrees with his description. To Edg. Smith's diagnosis, which is 

 otherwise very good, may be added: It is not only on the hinder side that the 

 fine transverse striæ are a little lamelliform, but also on the anterior side; in the 

 left valve are two cardinal teeth, separated by a deepish pit, the anterior is the 

 larger; there is, moreover, a corresponding lateral tooth, exactly like the one 

 described by Smith, in the right valve. The interior of the valves have fine, white 

 radiating rays, which stop at the palliai line. Luc. pisidium, Dkr., is very closely 

 allied to the present species. 



Lucina (Codakia) minima, Ten. Woods. 



LuciiKi minima, Tenison Woods, Descript. of New Tasnianian Shells, 1875, p. 30 (Proc. R. Soc. Tasmania, 



1876, p. 162). 



— — — — Tate and May, Proc. Linn. Soc. New Soutli Wales, 1901, p. 431. 

 _ — — — Pritchard and Gatliff, Proc. R. Soc. Victoria, 1903, XVI, p. 138. 



— {Codakia) Tatei, Angas, Proc. Zool. Soc. London, 1878, p. 863, pi. 54, flg. 15. 



Between Koh Mesan and Cape Liant, 5 — 9 fathoms {^h). Between Koh Kahdal 

 and Koh Kut, 6 fathoms, clay mixed with sand ('/a). Sound of 'Koh Chang, 3—5 

 fathoms, soft clay (2). 



Long. 1—3 mm. 



Distribution: — Singapore, shallow water (Sv. Gad). — Victoria ("coast 

 generally"). Cape Northumberland, Tasmania, St. Vincent's Gulf. 



Lucina (Loripes) desiderata, Sm. 



Lucina (Loripes desiderata, Edg. Smith, Report on the Lamellibianchiata of the voyage of H. M. S. 

 '•Challenger,' 1885, p. 185, pi. 13, fig. 10. 



Koh Chuen, 10—15 fathoms ('/a). W. of Koh Chuen, soft clay and mud ('Vs). 

 W. of Koh Kut, 15 fathoms (1/2). S. of Koh Kut, 17—20 fathoms, mud {'li). 



Long. 3—7 mm., (long. 7 mm, alt. 7 mm., crass. 45 mm.). 



Distribution: — South of New Guinea. 



The individuals collected by the "Challenger" Expedition reached a size of 

 only 3'/:i mm. in length; the largest specimens from the Gulf of Siam measure 

 7 mm., and are in addition very thin-valved and fragile. The individuals measuring 

 3 mm. in length agree exactly with Edg. Smith's figures; in the larger specimens 

 (dead ones) the dentiform projections at the lunule and on the hinder dorsal side 

 are not so prominent, but this is perhaps due to a bad state of preservation. 



Lucina (Phacoides), Dalli n. sp. 



;P1. Ill, Figs, y-l'i). 

 This species is a little higher than long, somewhat inequilateral, moderately 

 convex and thick, white, and marked with two (often more) radiating depressions 



22' 



