''"mT'] niOCEEDINGS OF TI[E NATIONAL MUSEUM. 305 



there, i.s Hiini«;ieiit (lillcicuc^i l)ct\vccii Mies*; two to vviiir;iut tlicir reiiiaiii- 

 in^ HcpjMiito. 



ABteromphahiB flabellatUH (Jrov. (Schriiidt'H A(I<'is, |»1. ;5K, lij;. Ul; M(t«)l)iiiH'n l']:iUw, 



l»l. 21, fiy. n.) Kr((|ii(ii(,. 

 Asteromphalus ShadboldtianuB (»r«v. (St;liriii(i(,'H AMiiH, pi. .'{><, (ij;. 17; MoobiiiH'H 



VUiUw, pi. :{;}, i\)s,. 1!K) Si-iimi. 

 AuliacuB caelatus Bail. (Scliinidl's Atl;iH, )»l. :i'2, li};H. [\-i:>.) Very hcjuco. 



The only speeies found of this |)roli(H', j^^cnus. 



Biddulphia aurita l>.viit,'li. (Scliiiiidt'H AMjih, ]>1. 120, fif,rH. r>-\(), jd. 122, (i;rH. 1-8.) 



(!i)iiiin(>n. 

 Biddulphia Tuomeyii 15r.d>. (Scdiinidt/H AtlaH, j)l. 11«, lifrH. 1-7, pi. 11!», fif^H. 1-8.) 



(Joiiirnon. 

 Chaetoceros coarctata liiiiid. (lianddr'n Ifoii^ K<"i«, pi. 8, lijr. 8, pa^c 7!>; (Mcvo'h 



Java, pi. 2, lij;. 10.) Fre<iiu)iit. 

 Chaetoceros varians liaiid. ( — Bactoriastrum varians, ftc). (Mocltiiiw'H I'latcH, 



pi. r>(}, (i;rn. l-fi.) l''r(!(|U»!llt. 



Tho {^(MiiiH HacteriaHtrum i'h rightly iiieliided in (JharloveroH; difler- 

 eiit frustiihiH in the siiine fihiinent oft(!n disphiyin^' th(i ehanict(;ri.stics 

 of both. 



Coccoiieis distans <Jr<);i;. ( I'ritcliard'H Inf., pi. 7, lijf. :W, pa^o^^TO.) S(;arc«. 

 Cocconeis placentula Mhib. (Van Hciirck'H Syn., pi. IJO, II^h. 2()-27 ; Mo(»l)iiiH'H 



riatoH, pi. '1, (ij;. 1.) FrcqiMiiit. 

 Cocconeis scutellum Elirh. (Pritdiard'H IiiC, pa^^o 8(i!); Vjiii llcmc I<'h Syn., pi. 



2f>, (i^H. 1-2.) (!(niimoii. 



Tlie above- li^^iires and desciiption by Mr. liall's apjtear sidlicicnt to 

 separate this li-om (!. distann. 



CoBCinodiscuB asteromphaluB Ehrlt. (Srhinidt'H AthiH, pl.diJ, {\ir». 1-2; pi. W'A, fijn;. 



22; Va.li Hciirck'H Syn., jd. l.'iO, li};H. 1 and .5; I'ritcliard'H Inf., iia|^c828.) Fr(j(|ii('nt. 

 CoBCinodiscus confusus Kattray. (Sdunidt/H AtlaH, j)!. (!:{, !)>;. l.j.) Frcqiionl. 

 CoBcinodisciiB convexiis A. S. (Scliniidt'H AMan, pi. (K), ligH. I'.i and 15.) Scarcer. 

 Cosciiiodiscixs decresceiiB (Jrun. (Scliniidt'H Atlas, pi. fil, lif;H. 8-10.) Frc(|ncnt. 

 CoKcinodisciis excentricus Elirb. (Scliniidt'H Atlan, [il. .~)8, li;;. lit; Van llcnrck'H 



Syn., pi. i;tO, li^H. 1 and 8.) (,'0111111011. 

 Coscinodiscus lineatiis lOlirh. (Van IInnrck'H Syn., )d. 1I}1, fi<f. li.) Frofpiont. 

 CoBcinodiscuB oblongus (Jrcv. (S( liinidt'H Atlan, pi. (5(5, ligH. 10-11.) Si-anui. 

 CoBcinodiflcuBradiatuslOlirl). (Scliniidt'H Atlas, pi. 00, fifj;H. .">,(!, 9, 10.) Very coninioii. 

 CoBcinodiscuB robustUB <ircv. (Sclmiielt's Atlan, pi. 02, (i;i^H. I-O.) Scarco. 

 CoBcinodiscus symbolophorus (iriin. (Scliniidt'H Atlas, jd. 1U8, lifrn. 1-3.) Fni- 



<|iicnt. 

 CoBcinodiscuB symmetricus <ircv. (Scliniidt'H Atlas, pi. :^>7, lij;. 27.) V(iiy common. 

 CoscinodiBCUB traduceus, var. hispida, Kattray. (Scliniidt's Atlan, ]>\.r>7, lij;. :{8.) 



Frc(|iicnt. 

 Cyclotella physoplea K^- (l01ircn)>cr;;'H Mik., I'l. 'Xi, 17, liK.8; Tritcliard's Inf., 



|>!i.j.;c 811.) Scarce. 



It is very proba))h', tliat this is only an inner shell of some other 

 Kp«'<;ie,H. 



Cyclotella striata (irun. (Van Ilciirck's Syn., pi.!>2, lif^s. 0-10, 12.) l''rc(|iH'nt. 

 Cymatopleura Bolea W. S. (Van Heiirck'H Syn., pi. 55, li^'H. .5-7; I'ritchard's In- 

 fusoria, pi. 0, fit;. 155, paj^c T.y.i.) Very scarco. 



The six transverse, undulations are absent in this variety. Indeed, 

 they are so frci^uently absent in spe(;iniens ol' this torin, that they 

 rroc. N. M. 9.'i 20 



