TITLES. 
Moll. 29 
493. Smith, H. M. The Mussel fishery and pearl-button industry of the 
Mississippi river. Bull. U. S. Fish. Comm. xviii, pp. 289-314, 21 pis. 
494. Smith, J. P. The development of Lytoceras and Phylloceras. P. 
Calif. Ac. Geol. i, pp. 129-160, pis. xvi-xx. 
495. Smith, W. H. Shells and Mastodon. Nautilus xiii, pp. 34 & 35. 
See also Walker, Nautilus xiii, p. 55. 
496. Sowerby, G. B. Marine investigations in South Africa. Description 
of a new South African Marine Gasteropod. Cape of Good Hope, 
Department of Agriculture 1898 [1899], 8vo, 7 pp., i pi. 
497. -. Description of Tridacna obesa , n. sp., from the Philippines. 
P. Malac. Soc. London iii, pp. 210 & 211, figg. 
498. —. Description of Nassa subconstricta , n. sp., from Port Canning, 
Mouth of the Ganges. T. c. p. 301, fig. 
499. -. Descriptions of two new species of [Marine] shells from Japan. 
Ann. Nat. Hist, iv, pp. 370-372, figg. 
500. Span, B. A contribution towards a list of the Marine Mollusca of 
Tenby and neighbourhood. J. Conch, ix, pp. 203-211. 
501. Standen, R. Remarks on the cause of abnormality in Planorbis 
spirorbis. J. Conch, ix, pp. 216 & 217. 
-. [See also Melvill & Standen (310-313).] 
502. Stearns, R. E. C. Preliminary description of a new variety of 
Haliotis [II. fulgens var. walaMensis], Nautilus xii, pp. 106 & 107. 
503. -. Urosalpiux cinereus in San Erancisco Bay. T. c. p. 112. 
504. -. Donax stultorum , Mawe = Conrad’s species, Cytherea crassatel- 
loides. Op. cit. xiii, pp. 73-75. 
505. -. Modiola plicatula , Lamarck, in San Francisco Bay. T. c. 
p. 86. 
506. Stefano, G. D. Un nuovo lembo conchiglifero di reggio Calabria. 
Boll. Soc. geol. Ital. xviii, pp. 1-3. 
507. -. Gli strati a Pinne di Morrocu. Nuovo lembo post-pliocenico 
di Reggio Calabria. T. c. pp. 255-280. 
508. -. Appendice alia fauna fossile di Morrocu. Riv. ital. Pal. v, 
pp. 115 & 116. 
509. -. Studi stratigrafici e paleontologici sul sistema cretaceo della 
Sicilia. Palaeontogr. ital. iv, 1898, pp. 1-46, pis. i-v. 
510. ^Steiner, J. Die Funktionen des Centralnervensystems und ihre 
Phylogenese. Dritte Abteilung. Die wirbellosen Tiere. Braun¬ 
schweig, 8vo, 1898. [Cf. Biol. Centrbl. xviii, pp. 749-751.] 
511. Steinmann, G. Ueber die Bildungsweise des dunklen Pigments bei 
den Mollusken nebst Bemerkungen ueber die Entstehung von Kalk- 
karbonat. Ber. Ges. Freiburg xi, pp. 40-45. 
See a note in Biol. Centrbl. xix, p. 681. 
512. -. Beitrage zur Geologie und Palaeontologie von Siidamerika. 
vm. Die Tertiarablagerungen des nordlichen Peru und ihre Mol- 
luskenfauna. Yon Josef Grzybowski. N. Jahrb. Min. B.B. xii, pp. 
610-664, pis. xv-xx. 
513. Stempell, W. Zur Anatomic von Solemya togata Poli, Zool. 
Jahrb. Anat. xiii, pp. 89-170, 3 pis. 
