30 



Eingicula arctaia Gonlil. 

 (Oliii Conili p l'2i I.i>K;likf, Jiip. Mccresconcli, v. 2, p. 78, pi. .'>, fig. If!. 

 17.). 



Small siH-ciiiKMis ol' tili.'» kind were the most In-tpRiit j: i U at Ojl, 



licing iiiMrly cqiiallcil in nuinU-r only hy tlie Niissa Japonica a:. _inia, nml 



piifpiL-iSiil only liy some «»f tl.o toncliilVriHTcllina nnRtita, Solcn sfrandis. Pofiintu 

 exolotji. Lucina borcalis, Diplodonta trigonii! 



l?ize. propoiti.!!, ' -ml narrown' 



2 fold* ami 1 ti utli ;;! ;.;, and with t' , 



whicli guflicf tiigc'lhiT with the proportions (lenftth t .nl \^ilh 



the nr.mU'r ol the wlioriK (T) r) to leave no douht ixhbui thv identity oi" the 8|iccie8 

 fonnil liviiij; at IFong Kon^ and Kngafaki. The trar.svcr.-c Ptriiv, not vcrj* 

 conspijKor.fi even in tho r:'?tiit ohell.', are hut sehh-m well prefcrved in the fossil. 

 It ficcniB doiilitfiil, whether the plioV-ene fowil sliellc, width S. Wood dc8<Til>ed 

 184S from the british cra^ under the name«of Kingicnla bucciuonnnd vontricosa 

 (C'raj; Moll. I, p. 22, |il. IV. f 1S2( lielong; to the ranie FiKvies or not. TIm y 

 arc much lar;];i.'r, the leniith of the largest Fpecimcns of Knjjland Ix'ing at W-.u-i 

 70^ greater than that of the largest Japanese. The piv>|>ortion(<, however, tlic 

 details of sculpture and form, the teeth and folds, and the thick outerlip together 

 with the nnrrow aj>ertnre do not differ. In this resjKct, it m.^.y be mentioned 

 that the folils are placed toin|iar;itively lower in the avemge in the ndtilt and 

 more developed si)eciincns, in which moreover the outer margin is more thickened. 

 Thus, thongh WoofI mvs he did not eoc any intermediate forms, we may 

 assume that U. vctitrii-osii is only the full grown ktage of H. hnccinea, ami mupt 

 1« er.ise«! an a specif». The analogous ditlerencc we fi:;d in the yor.nger and 

 «ilder sliells of Oji, only— l^th of them— in smaller dimension!. As for the 

 p.'ulptuie, it if!(juite iiatuml loseeit 1 -crvediii'' " ' 



in Kngland as well as at Oji, thun J: • deveiojt . . ... 



not nppoar either in the figure or in the «liagnoois and dcicrifilion of R. hucelnm 

 Woo.l. T^) a certainly, wc may ray that tho spicics o.'" the Cn>g, whiv h hy »mo 

 anthoi-s have h?cn Rlroady r.nited, arc at least very i ' ' 



Thi.'«, as rjonltl .oiys, is also ilofcly allied to 2 recent '■■ i 



propinfjuan^l, which I have had no occasion to e.xaniinc. 



Ficula r ticnldtd L:ini ink. 

 (Hi.st. Nat. des Ai:im. s. vcit. 2nd ed. Vol. IX. p. .'ilO— Phil. En. 

 Moll. Sic. Vol. II, p. 186.— S. Woo-.l. Crag Moll. I. p. 42, pi. 2, f. 12.— 

 I-ischkc, .Jap. Mecres-Coneh. v. I, p. 40.— Kicve, Icon., Fjcnla I. 1 >. 



One sm.'xll specimen found at Oji. 

 Xatl'ft Jut ma rck I an a Ueovc. 



(Conch. Icon. Natica, pi. 2, f. C— Lischke .I.vp.aii. Meere«-Conch v. 1, 

 p. 80.— Moree, Shell-.Mound of Omori, pi. 18. f. 8l. 



