CONTENTS. 



Page 



No. 1. — Contributions from the Zoological Laboratory. LXXXIII. Contri- 

 butions to the MoEPHOLOGT of the Tckbellaria. II. On some Turbel- 

 LARiA from Illinois. By W. McM. Woodworth. (1 Plate.) October, 1897 1 



No. 2. — On the Relations of certain Plates in the Dinichthtids, with De- 

 scriptions of New Species. By C. R. Eastman. (5 Plates.) October, 1897 17 



No. 3. — Contributions from the Zoological Laboratory. LXXXIV. Tricho- 

 NTMPHA, and other Parasites of Termes Flavipes. By J. F. Porter. 

 (6 Plates.) October, 1897 45 



No. 4. — Contributions from the Zoological Laboratory. LXXXV. Varia- 

 tions in the Brachial and Lu.mbro-Sacral Plexi of Necturus Macclo- 

 sus Rafinesque. By F. C. Waite. (2 Plates.) November, 1897 ... 69 



No. 5. — Reports on the Dredging Operations in the "Albatross" in 1891. 

 XXIL The IsopODA. By H. J. Hansen. (6 Plates and Chart.) Decem- 

 ber, 1897 93 



No. 6. — Contributions from the Zoological Laboratory. LXXXVII. The 

 Thoracic Derivatives in the Postcardinal Veins in Swine. By G. H. 

 Parker and C. H. Tozier. March, 1898 131 



No. 7. — Contributions from the Zoological Laboratory. LXXXIX. The 

 Segmentation of the Nervous System in Sqlalus Acanthias. A Con- 

 tribution to the Morphology of the Vertebrate Head. By H. V. Neal. 

 (9 Plates.) May, 1898 145 



