INTRODUCTION. 
Echin. 3 
iii Mesozoic :— 
a. 
General 
b. 
Cretaceous . 
c. 
Jurassic 
d. 
Lias . . . . 
e. 
Trias . . . . 
Palaeozoic :— 
a. 
General 
b. 
Permian 
c. 
Permo-Carboniferous . 
d. 
Coal Measures . 
e. 
Lower Carboniferous . 
f. 
Devonian 
g. 
Silurian 
h. 
Ordovician . 
k. 
Cambrian . 
1. 
Pre-Cambrian 
IV. —Systematic. 
a. Echinoderma, general . 
b. Holothurioidea 
c. Echinoidea .... 
d. Asteroidea .... 
e. Ophiuroidea.... 
F. Crinoidea .... 
G. Cystidea and Edrioasteroidea 
h. Blastoidea . . . 
k. Incertee Sedis 
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INTRODUCTION. 
I. Titles. The numbered entries in the following list amount to 268, 
a total which would have been increased had certain translations and 
republications received numbers, but which, even as it is, overtops the 
1898 list by 36 and the previous maximum (of 1891) by 81. The total is 
thus made"up: 1876, 1; 1877, 1; 1878, l;'l889, 3; "l890, 1; 1891, 1; 
1892,1; 1893,2; 1894,2; 1895,3; 1896,5; 1897,6; 1898,31; 1899,207; 
and 1900, 3. The magnitude of the total depends, then, less on the 
discovery of previous omissions than on the particularly large number 
of entries pertaining to the year of which this is professedly the record. 
It is of interest to compare this with the output, as now known, of the 
preceding years of the decade : 1891, regarded by its Recorder, Mr Minchin, 
as an exceptionally fertile year, has yielded 178 works ; 1892, 164; 1893, 
161; 1894, 152; 1895, 163; 1896, 193; 1897, 182; 1898, 198; and, since 
each of these totals is larger by about 28 than the number originally 
recorded, we might safely credit the last of the eighteen hundreds with no 
less than 235 writings relating in whole or part to Echinoderma. This 
does not take into account some 160 reviews, abstracts, and translations, 
many of them signed by writers of eminence, and all recorded, though not 
separately numbered, in the following list. It is of course hoped that the 
increased numbers may be due in part to the increased experience of the 
Recorder, as they are in part to the improvement and growth of the 
