432 
‘Thaumatocrinus renovatus, observa- 
tions on, 145. 
Tintinnodea, on the, 73. 
Triloculina, on dimorphism in, 67. 
Tristychius, on the structure and 
affinities of, 177. 
Tunicata, observations on some, 1. 
Typhceus, new species of, 219. 
Urticating cells, observations on, 260, 
Vertebrates and Invertebrates, on the 
answerable divisions of the brain 
in, 303. 
Walker, 8. T., on fish mortality in 
the Gulf of Mexico, 555. 
Wallich, Dr., on the detection of 
Polycystina within the hermeti- 
INDEX. 
* s 
/ Z 
he’ 
p 
cally closed cavities of certain 
nodular flints, 52. 
Waterhouse, C. O., on new species 
of Megalops, 335 ; on a new genus 
of Lucanoid Coleoptera, 387. 
Waters, A. W., on fossil Chilosto- 
matous Bryozoa, 64. 
Wood, S. V., on the “Crag Mol- 
lusca,” 66, 208. 
Wood-Mason, J., on the structure 
and systematic position of Scolo- 
pendrella, 55. 
Young, J.. on Ure’s “ Millepore,” 
154, 295, 
Ypthima, new species of, 50. 
END OF THE TWELFTH VOLUME, 
PRINTED BY TAYLOR AND FRANCIS, 
RED LION COURT, FLEET STREET, 
