NO. 1237. 



SYNOPSIS OF THE LUCINACEA—DALL. ^23 



CODAKIA (JAGONIA) GALAPAGANA, new species. 



(Plate XL, fig. 4.) 



Shell of moderate size, moderately convex, white or with a yellowish 

 flush, most conspicuous in the interior and frequently with a terru- 

 P-inous ting-e about the posterior dorsal area. It much resembles C. 

 Irbladafa Montagu, of the West Indies, but its most conspicuous fea- 

 ture is its somewhat loose and irregular radial sc-ulpture m which the 

 rib. are l^ifurcate or trifurcate distall>', somewhat as in (. eo.faa 

 d^Orl^iu-ny. The lunule is nearly evenly divided between the valves, the 

 dorsal areas inconspicuous, and the radials on the posterior area have a 

 tendency to become minutely nodulous. The figured specimen is from 

 Indefatigable Island, and measures: alt. 19, Ion. 19.5; diam. 9.0 mm. 

 Another has the alt. 21, Ion. 23 and diam. 9 mm. It appears to be 

 common on the shores of the Galapagos Islands, but has not been 

 found on the American coast or elsewhere as far as known. 



CODAKIA (JAGONIA) CHIQUITA, new species. 



( Plate XXXIX, fig. 1.) 



Shell small, suborbicular, flatfish, of a yellowish white color, with 

 the beaks small, rather elevated and erect but not tumid: sculpture of 

 recrular, sublamellose, concentric, rather crowded threads, under which 

 are numerous tine, often nearly obsolete, radial threads frequently 

 bifurcate distallv, less prominent on the middle of the disk and absent 

 from the dorsal areas; lunule well impressed, subequally divided 

 between the valves, short and sublanceolate; hinge and ligament deli- 

 cate normal, with no visible escutcheon, lateral teeth feeble; interior 

 polished, the margins minutely crenulate. Alt. 9.7, Ion. 10.0, diam. 



4.5 mm. , ^ ., ,, ,, 



This has only been found at one locality on the west side of the 

 lower end of the peninsula of Lower California, nearly abreast of La 

 Paz, in 66 fathoms. 



LUCINA PHENAX Ball and Simpson. 



(Plate XL, (ig. o. ) 



This prettv little species was discovered too late to ])e figured in the 

 Porto Rico report, and I have therefore inserted the illustration of it 

 here It is of a white color and delicate texture, quite tumid, and so 

 much resembles a Zori^lmis that it would be immediately taken for 

 one but a careful inspection of the hinge shows that the ligament is 

 external and the hinge that of a typical Laclna. The specimen figured 

 is from San Juan Harb«jr in 5 fathoms and measures: Alt. 8.b. Ion. 10, 

 diam. 3.5 mm. 



