S92 FORTY-THTRD REPORT ON THE StATE MuSEUM. 



The preceding synoptical table presents a list of the genera and 

 species, actually described in Volume YI of the Palaeontology of 

 NeW York. Of this number fifty species are not illustrated upon 

 the plates, though described in the text of the volume. This 

 omission has arisen from the limitation «,s to the number of plates 

 and figures to be included in the volume, by the contract of 1883. 



This contract was made after the work had been commenced and 

 thirty-three plates already lithographed, the restriction being 

 necessary in order to give each class of objects to be represented in 

 the several volumes its proper proportion, without exceeding the 

 entire appropriation for the final publication of volumes V, VI, 

 VII and VIII. 



In the beginning of this work for volume VI there was no 

 actual or anticipated restriction in the amount of text or number 

 of plates and the drawings were begun and continued with a view 

 of making the result as complete as the material at our command 

 would permit. With this object in view and having ab^iudant 

 material in some of the groups or families, these were very fully 

 illustrated. When, however, the restriction was imposed it became 

 necessary to make sjich a selection of the illustrations as would 

 give a fair expression of each group, and including as many of 

 the genera as practicable in our descriptions and illustrations. 



In furtherance of this plan it became necessary to omit all the 

 Feuestellidte of the Hamilton Group, besides many from the Upper 

 Helderberg Group, as already noticed. Many of the original 

 drawings made under the earlier conditions of the work named 

 above, still remain unutilized, but are at any time available for 

 further illustrations of the Bryozoa. 



There now remain available for such further use as may be 

 considered desirable about 290 figures, representing about seventy- 

 two species, chiefly of the Fenestellidje. To illustrate these 

 species fully would require about one hundred more figures, chiefly 

 of the celluliferous faces of these fossils. These species are 

 neither named nor described and the collection is of little scientific 

 value in its present condition. Were these forms named and 

 described the collection would become of much scientific value as 

 containing the type specimens of the species. There are also 

 about seventy figures of specimens described in the text of volume 

 VI, for which there was no room upon the plates. For the same 



