207 



PLATE LXXIV. 



Halichondkia faloula. 



Fig. 1. — Represents the type-specimen in the cabinet 

 of the Rev. A. M. Norman. Natural size. 



Fig. 2. — A skeleton spiculum. X 250 linear. 



Fig. 3. — One of the trenchant, contort, bihamate, 

 retentive spicula. X 250 linear. 



Haliohondria mutdla, Boiverhanh. 



Fig 4. — Represents the type-specimen in the cabinet 

 of the Rev. A. M. Norman. Natm^al zize. 



Fig. 5. — A skeleton spiculum. X 123 linear. 



Fig. 6. — One of the slender, acuate, tension spicula 

 X 123 linear. 



Fig. 7. — A tricurvato-acerate tension spiculum. 

 X 123 linear. 



Fig. 8. — One of the minute, dentato-palmate, equi- 

 anchoratSj retentive spicula. X 530 linear. 



Haliohondria expansa, Bowerbank. 



. Fig. 9. — Represents the type-specimen from the Isle 

 of Skye. In the cabinet of the Rev. A. M. Norman. 

 Natural size. 



Fig. 10. — One of the long, slender, incipiently- 

 spinous, tension spicula of the dermal membrane. 

 X 250 linear. 



Fig. 11. — A skeleton spiculum, entirely and in- 

 cipiently spinous. X 250 linear. 



Fig. 12. — One of the bi-denlate, inequi-anchorate 



