DESCRIPTION OF 17 



PLATE XVI. 



Page 



Fig. 1. AGARICOCRINUS WORTHENI. 6.19 







1 . View of a very fine specimen preserving a portion of the column,, and 

 the arms to the extent of three and a half inches, with about eighty 

 and in one about ninety joints on each side. The entire number was 

 probably more than one hundred joints. 



I3 ; ,1 & L* .tl 



Vis. 2. AGARICOCRINUS TUBEROSUS. 617 



c 



"2 a. The anal side of a specimen from which the arms have been separated. 



2 b. The base of the same specimen, the basal plates not being visible be- 

 yond the circumference of the column. All the other plates, to the 

 base of the arms, are shown in this figure. 



2 c. The dome, showing the aperture which opens upwards, the central 

 tuberculiform plate, and the ranges of larger plates from each arm; 

 there being two in the range of the anterior arm, at the base of the 

 central plate. 



Fig. 3, 8. CYATHOCRINUS STELLATUS. 628 



3. Interior of the cup. 



8. View of the exterior of the base. 



Fig. 4. ACTINOCRINUS NASHVILLE. 601) 



4 a. Anterior side of a well-preserved specimen. [ The figure is too broad 

 below, and the brachial margin is not sufficiently prominent.] 



4 b. A similar view of another specimen, representing more perfectly the 

 form of the base. 



si T 

 Fig. 5 & 6. ACTINOCRINUS BITURBINATUS. . 616 



">. Anterior side of an individual with the base somewhat longer than usual, 

 preserving the arms and a portion of the column. 



. tf a. Anal side of a specimen without arms, with base of proboscis which 

 is turned obliquely towards the anal side. 



06. Anterior side of same. 

 6 c. Basal view of same. ' 



jiffii;,- 



Fig. 7. ACTINOCRINUS PERNODOSUS, var.? 617 



7. The anterior side of the specimen. 



[low A PLATES.] 



