176 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



EXPLANATION OF PLATES 



Plate 1 



Page 



Fig. 1. Achnanthes cocconeiformis, new species. X580 10 



2. Achnanthes compacta, new species. X970 10 



3. Achnanthes tenuistauros, new species. X600 11 



4. Achnanthes tenuistauros, new species. X600 11 



5. Achnanthes tenuistauros, new species. X590 11 



6. Achnanthes tenuistauros, new species. X590 11 



7. Actinocyclus bipartitus, new species. X790 12 



8. Actinoptychus parvus, new species. X930 15 



Plate 2 



Page 



Fig. 1. Actinocyclus decussatus, new species. X570 12 



2. Actinocyclus decussatus (type). X825 12 



3. Allonitzschia munifica, new species. X570 16 



Plate 3 



Page 



Fig. 1. Amphiprora limpida, new species. X875 16 



2. A mphiprora o'swaldii Janiseh. X550 17 



3. A mphora alternata, new species. X400 18 



4. Amphora anceps, new species. X510 18 



5. Amphora clathrata, new species. X600 T 19 



6. A mphora compacta, new species. X580 19 



7. A mphora cucunieris, new species. X480 20 



8. Amphora henshawii, new species. X760 23 



Plate 4 



Page 



Fig. 1. Amphora dichotoma, new species. X900 21 



2. Amphora dura, new species. X680 22 



3. Amphora tumulifer, new na,me. XHOO 28 



4. A mphora flexa, new species. X590 22 



5. A mphora lunar is, new species. X390 24 



6. Amphora pauca, new species. X390 25 



Plate 5 



Page 



Fig. 1. Amphora pulchra Greville. X690 26 



2. A mphora recessa, new species. X430 27 



3. A mphora nodosa Brun, variety. X590 25 



4. Amphora magnifica Greville. X580 25 



5. Amphora sima, new species. X400 27 



6. Amphora intersecia A. Schmidt, variety? X490 24 



Plate 6 



Page 



Fig. 1. Anisodiscus adeei, new species. X570 28 



2. A ulacodiscus pretiosus, new species. X300 31 



3. A ulacodisc us recedens, new species. X570 31 



4. Auliscus phiUppinarum, new species. X570 32 



5. Asteromphalus areolatus, new species. X710 30 



