CONTENTS. 



Page 

 No. 1. — Contributions from the Zoological Laboratory. XXXIII. On Urna- 

 tella gracilis. By C. B. Davenport. (6 Plates.) January, 1893 ... 1 



No. 2. — Contributions from the Zoological Laboratory. XXXIV. Note on 

 Carotids and the Ductus Botalli of the Alligator. By C. B. Davenport. 

 (1 Plate.) January, 1893 45 



No. 3. — Contributions from the Zoological Laboratory. XXXV. On the 

 Eyes, the Integumentary Sense Papillas, and the Integument of the San 

 Diego Blind Fish (Typhlogobius californiensis, Steindachner). By W. E. 

 Ritter. (4 Plates.) April, 1893 51 



No. 4. — Reports on the Dredging Operations off the West Coast of Central 

 America to the Galapagos, etc., by the U. S. Fish Commission Steamer 

 "Albatross." IV. Vorlaufiger Bericht iiber die erbeuteten Holothurien. 

 Von Hubert Lddwig. June, 1893 105 



No. 5. — Contributions from the Zoological Laboratory. XXXVI. The 

 Development of the Scales of Lepidosteus. By W. S. Nickerson. (4 

 Plates.) July, 1893 115 



No. 6. — Contributions from the Zoological Laboratory. XXXVII. Studies 

 in Morphogenesis. I. On the Development of the Cerata in iEolis. By 

 C. B. Davenport. (2 Plates.) July, 1893 141 



No. 7. — Reports on the Dredging Operations off the West Coast of Central 

 America to the Galapagos, etc., by the U. S. Fish Commission Steamer 

 "Albatross." VI. Preliminary Descriptions of New Species of Crustacea. 

 By Walter Faxon. August, 1893 149 



