204 



PROTOZOA; 



No. 1181. Spongia . 



Silicified. From the same locality and Cabinet as the preceding. 



Size, 7x1. Price, $0.60. 



No. 1182. Spongia . 



Silicified. From the Upper Chalk, Bridlington, England, 

 and now in the Ward Museum, University of Eochester. 



Size, 6x2. Price, $0.60. 



No. 1183. Spongites vagans ? Quenstedt. 



From the Middle Oolite, Wirtemberg, and now in the private Geological 

 Cabinet of Mr. Ward, Rochester. Price, $0.40. 



No. 1184. Tragos . 



The Sponges of tbis genus are turbinated, and have rather large oscula, dis- 

 posed irregularly on the inner surface. From the Middle Oolite, Wirtemberg, 

 and now in the private Geological Cabinet of Mr. Ward, Rochester. 



Price, $0.50. 



No. 1185. Ventriculites . 



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The Ventriculites are the largest group of Cretaceous Sponges. 

 They are shaped like a mushroom or funnel, tapering to a point below, 

 and attached by rootlets. The astonishing complication of their sur- 

 face is shown by the fact, pointed out by Toulmin Smith, that in one 

 specimen, only three inches high, nine millions of fibrils were found ! 

 From the Upper Chalk of Bridlington, England, and now in the Ward 

 Museum of the University of Rochester. Size, 10 x 3. Price, $1.00. 



No. 1186. Ventriculites alcyonoides, Mant. 



From the Chalk of Kent, England, and in the same Museum as the preced- 

 ing. Price, $0.60. 



No. 1187. Ventriculites radiatus, Mant. 



Two specimens. A broadly expanded, discoid Sponge with a small round 

 stem. From the Upper Chalk, Bridlington, England, and now in the Ward Mu- 

 seum, University of Rochester. Price, $1.50. 



No. 1188. Ventriculites radiatus^ Mant. 



From the same locality and Museum as the preceding. Price, $0.40. 



No. 1189. Ventriculites . 



From the same locality and Museum as the preceding. Price, $0.50. 



