i 
I. 
ri: 
IV. 
II. 
TE, 
CONTENTS OF VOL. IX. 
No. 1. — January, 1894. 
T. H. Moreay. 
The Development of Balanoglossus 
BASHFORD DEAN. 
Contributions to the Morphology of Cladosel- 
ache (Cladodus) 
Wiruiam A. Locy. 
The Optic Vesicles of Elasmobranchs and 
their Serial Relations to other Structures 
on the Cephalic Plate 
Henry H. DONALDSON. 
Preliminary Observations on some Changes 
caused in the Nervous Tissues by Re- 
agents commonly employed to harden 
them 
No. 2. — April, 1894. 
WittiAm Morton WHEELER. 
Syncelidium Pellucidum, a New Marine 
Triclad 
Wititiam Morron WHEELER. 
Planocera Inquilina, a Polyclad Inhabit- 
ing the Branchial Chamber of ana 
Canaliculatus, Gill 
MartTHA BUNTING. 
The Origin of the Sex-Cells in Hydractinta 
and Podocoryne; and the Development 
of Hydractinta 
PAGES 
1—86 
87-114 
II§—122 
123-166 
167-104 
195-201 
203-236 
