TITLES. 
Moll 29 
502. Somerville, A. The Conchology of the Clyde : geographical and 
biographical. J. Conch, x, pp. 137-141. 
503. Sowerby, G. B. Note on the Opercula of Turbo pulcher Reeve and 
T. ticaonicus Reeve. P. Malac. Soc. London v, p. 12. 
504. -. Mollusca of South Africa. In Marine Investigations in South 
Africa, Cape Town, 1902, pp. 93-100, pi. ii. 
505. Springer, A. On some living and fossil snails of the Genus Physa , 
found at Las Vegas, New Mexico. P. Ac. Philad. 1902, pp. 513-516. 
506. Stanton, T. W. Chondrodo?ita, a new genus of Ostreiform Mollusks 
from the Cretaceous, with Descriptions of the Genotyj^e and a New 
Species. P. U. S. Mus. xxiv, pp. 301-307, pis. xxv & xxvi. 
507. Stearns, R. E. C. Helix var. circumcarinata and Pyramidula elrodi. 
Nautilus xvi, pp. 61 & 62. 
508. -. “ Pyramidula ” elrodi and Epiphragmophora circumcarinata. 
T. c. pp. 83 & 84. 
509. -. The Fossil Fresh-Water Shells of the Colorado Desert, their 
Distribution, Environment, and Variation. P. U. S. Mus. xxiv, 
pp. 271-299, pis. xix-xxiv. 
510. -. Fossil shells of the John Day Region. Science xv, pp. 153 & 
154. 
511. -. Unio condoni in the John Day Beds. T. c. p. 392. 
512. Stefani, C. de. Molluschi pliocenici di Viterbo. Atti Soc. Toscana 
xviii, pp. 22-33, pi. ii. 
513. - & Dainelli, G. I terreni eocenici presso Bribir in Croazia. 
Rend. Acc. Lincei xi, pp. 154-157. 
514. Stefano, G. de. I molluschi degli strati di Gallina (Reggio Cal.), 
e la loro eta. Riv. ital. Pal. viii, pp. 27-32. 
515. -. I fossili e la geologia di capo Milazzo in Sicilia. Atti Acc. 
Gioen. xiv, No. x, 23 pp. 
516. Steinach, E. Studien liber die Hautfarbung und liber den Farben- 
wechsel der Cephalopoden. Arch. ges. Physiol, lxxxvii, pp. 1-37, 
pis. i & ii. 
517. -. Ueber die locomotorische Function des Lichtes bei Cephalo¬ 
poden. T. c. pp. 38-41. 
518. Stent a, M. Zur Kenntniss der Stromungen im Mantelraume der 
Lamellibranchiaten. Arb. Inst. Wien xiv, pp. 211-240, figg. 
519. Sterki, V. Pisidium strengii, n. sp. [United States]. Nautilus xv, 
p. 126. 
520. -. Some notes on the North-American Calyculince , with new 
species. Op. cit. xvi, pp. 89-93. 
521. -. Some additions and corrections to the list of land and fresh¬ 
water Mollusca of Tuscarawas Co., Ohio. Ohio Natural, ii, pp. 286 & 
287. 
522. Steuer, A. Mytilicola intestinalis , n. gen. n. sp. aus dem Darme 
von Mytilus galloprovincialis Lam. Zool. Anz. xxv, pp. 635-637, 
2 figg. 
523. Steusloff, U. Xerophile Heliceen im Osten Mecklenburgs. Arch. 
Ver. Mecklenb. lv, pp. 176-179. 
