LIST OF PUBLICATIONS. 
Moll. 11 
[Hedley, C.] (2) On the Structure and Systematic Position of Cysto- 
pelta. T. c. pp. 44-46, pi. i. 
Suggests that it is an aberrant form of Helicarion. 
Heilprin, A. (1) The Eocene Mollusca of the State of Texas. P. Ac, 
Philad. 1890, pp. 393-406, pi. xi. 
. (2) The Geology and Palaeontology of the Cretaceous Deposits of 
Mexico. T. c. pp. 445-469, pis. xii-xiv. 
No new species. 
Heimburg, H. von. Diagnose einer neuen Helix. Nachr. mal. Ges. 
1890, p. 191. 
II. aggiei, n. sp., from Solomon Islands. 
Hemphill, H. (1) Descriptions of New Varieties of North American 
Land Shells. Naut. iii, pp. 133-135. 
. (2) An American Anadenus. Op. clt. iv, p. 2. 
A. coclcerelli, n. sp., California. 
. (3) New Varieties of Patula strigosa . T. c . pp. 15-18. 
Henchman, Annie P. The Origin and Development of the Central 
Nervous System in Limg,x maxipius . Bull. Mus. C. Z. xx, pp. 1 69— 
208, pis. i-x, woodcuts. 
Herdman, W. A. On the Structure and Functions of the Cerata or 
dorsal Papillae in some Nudibranchiate Mollusca. Q. J. Micr. Soc. 
xxxi, pp. 41—63, pis. vi-x. 
All the forms of cerata are probably epipodial processes. By their 
varied shapes and colours they give to the animals appearances which 
are in some cases protective and mimetic, and in others conspicuous 
and warning, as is best suited to their individual surroundings and 
mode of life. 
& Clubb, J. A. Third Report upon the Nudibranchiata of the 
L. M. B. C. District. P. Liverp. Biol. Soc. iv, pp. 131-169, pis. vi-ix. 
Hoernes, R. Ueber die Pleurotomen des Wiener Tertiar-Beckens. 
Verh. geol. Reichsanst. 1890, pp. 178-181. 
Huddleston, W. H. Further Notes on some Mollusca from West 
Australia. Geol. Mag, 1890, pp. 241-246, pi. ix. 
Mesozoic fossils ; several new species. 
Hudson, B. Mollusca collected at Kildale-in*Cleveland. Naturalist, 
1890, p. 271. 
Hyatt, A. Genesis of the Arietidai. Smiths. Contrib. Knowledge, xxvi, 
250 pp., 14 pis. 
Preface on Morphogenesis and Evolution. Chap. I. On Progression, 
Retrogression, Acceleration. Chap. n. A Genealogy. Chap/m. Genesis 
of Characteristics. Chap. iv. Geological and Faunal Relations. Chap. v. 
(pp. 120-221). Descriptions of Genera and Species. 
1890. [vol. xxvn.] d G 
