240 ^- NISHIWaDA ; ORGANIC EEMATXS FROM THE 



HiidroconiJlt'Ncr. A part of tlie hranclies of tlie cœnostenm entirely 

 converted into rrystalline caleite is .shown in V\. XXIX. Its 

 tangential .section exliil)its (races of the ü'a.stropores and dachdopores. 

 A vertical section shows that tlie creani-wliite cdcitied tal)es are 

 intersected I)\' transver.se partitions or '• tabnla?," a structure sn^'o'estive 

 of what are called zo()idal tid)es, which traversed the calcareous skele- 

 ton of the animal, and contained the ü-astro/o(tids and dactvlozoinds. 



Xo Htcratnre relatinu" to fossil MiUrpnrn hevond fhe text-hooks of 

 Professors Zittel and Xicholson. is accessihle t(^ nie : and it is therefore 

 inipossil)le at ])artition to identify thes pecies or stiidv the details of 

 this douhifnl form. 



Foraminifera. 



The microscope reveals the presence of manv of the simpler forms 

 of Foraminifera, in the limestone, hut few of them are well preserved. 

 On tliis account no o-ood .sections for examination luive been u'ot hut 

 f^o fir as they can he identiht;d in .sections, thev appear to belong to 

 GluoKjernui, XüJosariit. Miliula, Ilotalia (^?), and ^linphistegina. 



Peeten sp. 



For (his specimen I am indebted to ^Ivx. ]\rive Atsumi, of Okami, 

 who was kind enough (o su1)mit it to me for examination. Its 

 species ])i'oves to Ije indeterminable through imperfect presei-vafion. 



Loc, Okamivama ; rare. 



Turbo mekaniiensis m. 



ri. XXIX. Fig. ") a and h. 



Shell tu.rlfmated nv ovate-pointed ; composed of 5 vsdiorlsl 

 convex and separated by subcanaliculated sutures, upper two wdiors, 



