110 Messrs. Austins' Arrangement of the Crinoidea. 



Genus 3. Melocrinites } Goldf. 

 Sp. 1. M. ? hieroglyphicus, Gold/. Sp. 3. M. ? gibbosus, Goldf. 

 2. M. ? lsevis, Goldf. 



Genus 4. Tetracrinites, Austin's MS. 

 Sp. 1. T. formosus, dust. MS. 



Family 8. Periecocrinoidea, Austins MS. 

 Genus 1. Periecocrinites, Austin's MS. 

 Sp. 1. P. costatus, Aust. MS. Sp. 3. P. globosus, Aust. MS. 



2. P. articulosus, Aust. MS. 



Genus 2. Sagenocrinites, Austin's MS. 

 Sp. 1. S. expansus, Phill. Sp. 2. S. giganteus, Aust. MS. 



Family 9. Merocrinoidea. 

 Genus 1. Dimerocrinites, Phill. 

 Sp. 1. D. decadactylus, Phill. Sp. 2. D. icosidactylus, Phill. 



Genus 2. Tetramerocrinites, Austin's MS. 

 Sp. 1. T. simplex, Aust. MS. 

 There are several other families and genera containing many spe- 

 cies under consideration. 



Order 2. Liberidce, Austin's MS. 

 The animals of this order differ but slightly in their general struc- 

 ture from those in the preceding one. They however possess the 

 power of free motion ; are either permanently unattached or become 

 so in their mature state. Some species are furnished with a tapering 

 column, which enables the animal to attach itself to extraneous ob- 

 jects, or to detach itself at will, and move freely through the water. 



Family 1 . Gnathocrinoidea, Austin's MS. 



Genus 1. Gnathocrinites, Austin's MS. 



Sp. 1 . G. fusiformis, Aust. MS. 



Family 2. Astracrinoidea, Austins MS. 



Genus 1. Astracrinites, Austin's MS. 

 Sp. 1. A. tetragonus, Aust. MS. 



Genus 2. Aporocrinites, Austin's MS. 

 Sp. 1. A. gyratus, Aust. MS. 



Family 3. Comastella, Austin's MS. 

 Genus 1. Comatula, Lamarck. 

 Sp.l. C.pinnata, Goldf. Sp. 4. C. filiformis, Goldf. 



2. C. tenella, Goldf. 5. C. rosacea, Link. 



3. C. pectinata, Goldf. &c. &c. 



Genus 2. Marsupites, Mantell. 

 Sp. 1. M. ornatus, Miller. 



Class 2. Olenestella, Aust. MS. Spinigrad a, Forbes. 

 Body covered with calcareous scales or plates ; mouth surrounded 



