430 [OcTroBER, 
On leave granted, Dr. Le Conte presented for publication a paner by 
Profs. W. H. Harvey and J. W. Bailey, on new species of Diatomacese, 
collected by the U. 8. Exploring Expedition; which was referred to 
Drs. Leidy, Le Conte, and Zantzinger. 
The Committee stated that the paper had already been examined and 
was approved by them, and they accordingly reported in favor of its 
publication in the Proceedings. 
New species of Diatomacee, collected by the United States Exploring Expedition, 
under the command of Capt. Wilkes, U. S. N. 
By Proressor W. H. Harvey and Proressor J. W. Bairey. 
The species of Diatomaceze here described as new, together with the other 
species included in the list on page 431, were detected either as parasites upon 
Alge, or entangleu in mud adhering to shells, alge, &c., brought home by the 
Exploring Expedition under the command of Capt. Wilkes. 
1. AmpuireTRas FAvosa, Harvey et Bailey. Loricis tabularibus; lateribus 
vix concavis, primario; secundario quadrangulo, angulis fere rectis vix productis, 
superfice cellulis magnis hexagonis tessellata. Hab. Mindanao. 
2. Ampuiterras Witxesit1, H. et B.; loricis ‘prismatico-tabularibus, lateri- 
bus concavis, primario longitudinaliter striato-punctato medio transversim zo- 
nato; secundario quadrangulo, angulis productis rotundatis, superficie cellulis 
minutis in lineas simplices furcatasque dispositis notata, prominentiis jugalibus 
punctulatis. Had. Puget’s Sound. 
3. Aunacopiscus Orrcanus, H. et B.; loricA prominentiis tredecim intra- 
marginalibus instructa, a quibus tot radii fere ad umbonem procurrent; super- 
ficie preter umbonem glaberrimum, minute punctata iridescente. Hab. Puget’s 
Sound. ible fa 
4, Campytopiscus Kurzineu, H. et B.; sellaformis late marginata sulcis sub- 
quinguaginta transversis continuis curvatis impressa. Hab. Mindanao. 
5. Cocconris Parmuna, H. et B.; late elliptica, linea media longitudinali 
notata, utroque latere costis (vel sulcis) transversis magnis 10-12 irregularibus 
impressa; superficie transversim striato-granulata. Had. Tahiti. 
6. Cocconeis RHOMBIFERA, H. et B.; late elliptica vel suborbicularis linea 
media oblique-longitudinali sigmoidea areolam glabratam percurrente que apice 
et basi attenuata est, et versus umbonem in rhombi formam ampliata; superficie 
decussatim et transversim punctata. Had. Puget’s Sound. 
7. Cocconets suLcaTa, H. et B.; late elliptica vel suborbicularis transversim 
suleata, subcis 30-40 arcuatis. Had. Puget’s Sound. 
8. Hyatosira puncraTa, H. et B.; loricis magnis in catenas longas co-ordi- 
natis rectangulis subquadratis transversim interrupté vittatis; vittis medio lorice 
alternantibus granulatis, alternis serie punectarum insignium ornatis. Had. 
Tahiti. 
9. Isrumra minima, H. et B.; zona transversali subtilissime decussatim pnne- 
tata, lateribus (secundariis) cellulis magnis granulata. Hab. Rio Janeiro and 
Sooloo Sea. 
10. Tricrratium concavum, H.et B.; lorica lateribus valde concavis angulis 
rotundatis, superficie triquetra cellulis minutis in lineas radiantes simplices fur- 
catasque co-ordinatis notata; prominentiis jugalibus punctulatis. Had. Tahiti. 
11. Tricrratium cieposum, H. et B.; parvum, fere inflato-globosum, lateribus 
valde convexis, angulis prominentibus, superficie ut in I. concavum notata. 
Hab. ‘Tahiti. 
12. TrickraTiuM oRIENTALE, H. et B.; magnum; lateribus convexis angulis 
