538 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



auriculata, Helix, 345, 361. 

 aurita, Biddulphia, 34. 

 australica, Podocystis, 140. 

 australis, Omphalopsis, 129. 



Stictodesmis, 147. 

 avittata, Cochlostyla (Chrysallis) lichen- 



ifer, 480, 481. 

 bacteriastrum, Chaetoceros, 57. 

 Bacteriastrum, 55, 57. 



furcatum, 58. 



hyalinum, 57. 



varians, 56, 57. 



varians princeps, 57. 



wallichii, 57. 

 baculosa, Cidaris (Cidaris), 257. 



Prionocidaris, 258. 

 balaena, Biddulphia, 34, 81. 



Trigonium, 34, 161, 170. 

 baldjikii, Achnanthes, 12. 

 balearica, Biddulphia, 34. 

 balei, Lvtocarpus, 199, 236. 



Thecocarpus, 199, 236, 242. 

 balticum, Pleurosigma, 132, 133, 138. 

 banahaoana, Cochlostyla rufogaster, 



336. 

 barbadense, Skeletonerna, 145. 

 barbadensis, Actinodiscus, 14. 



Heibergia, 166. 

 barbitos, Navicula, 95. 

 barthelowi, Obba gallinula, 343. 

 bartholomei, Navicula, 100. 

 Bartsch, Paul, on Cochlostyla rufogaster 

 and Obba marmorata and their 

 races, 329. 



on Cochlostyla of Mindoro Prov- 

 ince, 373. 



on land shells of the genus Obba 

 from Mindoro Province, 343. 



on land shells of the genus Opis- 

 thoporus, 323. 

 bartschi, Cochlostyla (Calocochlea) rois- 

 syana, 387, 388, 393. 



Helicostyla (Calocochlea) roissyana, 

 388. 

 beaumontii, Asteromphalus, 30. 

 belgica, Navicula, 123. 

 bellus, Campylodiscus, 49. 

 benguetana, Cochlostyla rufogaster, 330. 



Obba marmorata, 338, 339. 

 bertillonii, Surirella, 151, 181. 

 beyrichiana, Navicula, 95. 

 biangulatus, Campylodiscus, 49. 



Coscinodiscus, 65, 95. 

 biarmata, Antennella, 199, 226, 241. 

 biciliatus, Opisthoporus, 323, 327. 

 biclavata, Navicula, 95. 

 biconvexa, Amphora, 19. 

 bicorne, Triceratium, 38. 

 bicornis, Biddulphia, 34. 

 bicoronatum, Stictodiscus, 167. 



Trigonium, 149, 161, 165, 169, 182. 

 bicoronatus, Stictodiscus, 166-168. 

 Biddulphia, 2, 33, 35, 36, 39, 40, 42, 44, 

 81, 161, 164, 168, 171. 



abjecta, 33, 177. 



antillarum, 8, 34. 



aurita, 34. 



balaena, 34, 81. 



Biddulphia balaena arctica, 166. 

 balearica, 34. 

 bicornis, 34. 

 birostrum, 34. 

 broeckii, 35. 



(Triceratium) broeckii, 38. 

 brookei, 35. 

 campechiana, 8, 35. 

 castellifera, 35. 

 chinensis, 42. 

 cingulata, 35, 36, 177. 

 concava, 35. 

 consimilis, 36. 

 cornigera, 36, 39, 177. 

 cornuta, 37. 

 culcitella, 37. 

 cuspidata, 37. 

 cycloides, 37, 177. 

 discursa, 37, 177. 

 distincta, 38. 

 dubia, 38. 

 elegans, 8. 

 exacta, 38, 177. 

 expedita, 36, 39. 

 favus, 37-39, 46, 165. 

 fimbriata, 39. 

 fractosa, 39, 177. 

 gemina, 40. 

 gibbosa, 40. 

 grundleri, 40. 

 grunowiana, 40. 

 heteroceros, 40, 44. 

 impressa, 40. 

 indica, 41. 



(Triceratium) inelegans, 42. 

 informis, 41, 177. 

 insignis, 41. 

 interrupta, 44. 

 inversa, 41, 177. 

 japonica, 35. 

 juncatensis, 7, 42. 

 juncta, 42. 

 madagascarensis, 42. 

 membranacea, 42. 

 mobiliensis, 42. 

 oamaruensis, 36. 

 papillata, 43. 

 pentacrinus, 43, 45. 

 pentecrinus, 8. 

 petitiana, 43, 177. 

 petitii, 43, 44, 177. 

 polymorpha, 58. 

 pulchella, 44, 80, 81. 

 punctata, 44, 48. 

 pygmaea, 44. 

 radiata, 44. 

 reticulata, 38, 45. 

 reticulata subspinosa, 45. 

 retiformis, 45, 177. 

 robertsiana, 45. 

 roperiana, 45. 

 rudis, 45, 177. 

 schmidtii, 46. 

 scitula, 8, 39, 46. 

 (Triceratium) scitula, 35. 

 (Triceratium) scitulum, 38. 

 secedens, 46. 

 setigera, 46. 



