LIST OP PUBLICATIONS. 
Ech. 15 
Russo, A. (1) Ricerche sulla disfcruzione e sul rinnovamento del paren- 
cbima ovarico nelle Opliiureae. Zool. Anz. xiv, No. 356 (Feb. 16, 
1891), pp. 50-59, 15 woodcuts. Abstract in J. R. Micr. Soc. 1891, 
pt. 3, p. 352. 
. (2) Fasi di sviluppo del sisteina acquifero e dello scheletro calcareo 
nell’ Amphiura squamata, Sars. Anat. Anz. vi, No. 11 (June 11, 1891) 
pp. 299-308, 11 woodcuts. 
. (3) Die Keimblatterbildung bei Amphiura squamata , Sars. Zool. 
Anz. xiv, No. 377 (Nov. 16, 1891) pp. 405-407, 3 woodcuts. 
. (4) Ricerche citologiche sugli elementi seminali delle Ophiurece 
(spermatogenesi-oogenesi) Morfologia dell’ apparechio riproduttore. 
Internationale Monatschrift fur Anat. und Phys. 1891, viii, heft. 8, 
pp. 293-329, pis. xxi & xxii. 
. (5) Le prime fasi di sviluppo nell’ Amphiura squamata , Sars. 
Boll. Soc. Nat. Napoli (1) v, fasc. 2, pp. 143-147, 5 woodcuts. 
. (6) Della embriologia e dell’ apparato riprodottore dell’ Amphiura 
squamata , Sars (Nota riassuntiva). T. c. pp. 181-188. 
Schluter, C. Yerbreitung der regularen Echiniden in der Kreide Nord- 
deutschlands. Z. geol. Ges. xliii, heft 1, pp. 236-243, and Yerh. Ver. 
Rheinl. xlviii [(5) viii], first half, pp. 81-91. 
Gives a table of vertical distribution of regular Echinids in the Creta- 
ceous of N. Germany. 
Schneider, C. C. Untersuchungen fiber die Zelle. Arb. z. Inst. Wien, 
ix (2) pp. 179-224, 2 pis. 
Includes studies on the ovum of Strongylocentrolus lividus, and of 
Sphcerechinus brevispinosus. 
Semon, R. Morphology of the ciliated Bands of Echinoderm Larvae. 
J. R. Micr. Soc. 1891, pt. 2, p. 202 ; Am. Nat. xxv, No. 292, pp. 382- 
384. Abstracts of the paper by this author in Jen. Z. Nat. xxv, 
heft 1, pp. 16, ct seq. ; see Zool. Rec. 1890. 
Semper, K. Discussion on a Memoir by Marshall, <c Ueber Autotomie 
oder Selbstverstfimmelung bei Thieren.” SB. Ges. Leipzig, 1888-89, 
p. 87. 
Seunes, J. Echinides Cr6tac6s des Pyrenees occiden tales, Pt. 3. Bull. 
Soc. Geol. (3) xix, No. 1, pp. 23-33, pis. i-v, 5 woodcuts. 
Sharp, W. The Sea Urchin. Report and Transactions of the Guernsey 
Soc. of Nat. Sci. and Local Research, 1890, pp. 61-64. 
A popular account. 
Siemiradzki, J. Faune des Stages Oxfordien et Kimeridgien en Pologne. 
Seconde partie. Bulletin international de l’Academie des Sciences de 
Cracovie, Oct., 1891, p. 283. 
Title and notice only. 28 Echinoderms. 
