CONTENTS. 
No. 1.— Report on the Results of Dredging by the United States Coast 
Survey Steamer “ Blake.” XXX. Report on the Holothurioidea. By 
Hsatmar TuHetev. (1 Plate.) October, 1886. Ge he Wisteaths ys 
No. 2.—A Second Supplement to the Fifth Volume of the Terrestrial Air- 
breathing Mollusks of the United States and adjacent Territories. By 
W. G. Binney. (8 Plates.) December, 1886 
No. 8.—Simple Eyes in Arthropods. By E. L. Mark. (5 Plates.) 
February, 1887 SP Viola ieagiktay h.saV hone ott cnBiton Tel) aflumasn, Sym ee text its 
No. 4.— Studies from the Newport Marine Laboratory. XVIII. On the 
Development of the Calcareous Plates of Amphiura. By J. W. FewKzs. 
(3 Plates.) May, 1887 . 
No. 5.— Preliminary Account of the Fossil Mammals from the White River 
Formation contained in the Museum of Comparative Zodlogy. By W. B. 
Scorr and H. F. Ossporn. (2 Plates.) September, 1887 
No. 6.— The Eyes in Scorpions. By G. H. Parker. (4 Plates.) Decem- 
ber, 1887 . rie ist TS ae Peal AL ac mt Ys a Md i A les iat: 
No. 7. — Studies from the Newport Marine Laboratory. XIX. On certain 
Meduse from New England. By J. W. Fewxes. (6 Plates.) February, 
1888 SUC RALT Oe peace. PID. Oh Ml PORE | ron ee 
No. 8.—On certain Vacuities or Deficiencies in the Crania of Mammals. 
By D.D. Stave. (2 Plates.) March, 1888 
No. 9.— The Superior Incisors and Canine Teeth of Sheep. By FLorencu 
MANO Tn (2PElates:) MeO URE Wt SCOi a.) ser Mlb lce |e) eu) lite 
No. 10.— The Rattle of the Rattlesnake. By S. Garman. (2 Plates.) 
August, 1888 yt Cree Cees iC An eet Oa ote 
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