1867.] DR. J. E. GRAY ON SPONGES. 525 



Morris, Ann. N. II. iv. p. 239 ; Bianconi, Nuov. Ann. Sci. Nat, Bo- 

 logna, vi. p. 455, 1841. 



Vioa, II. Michelin, Revue Zoolog. 1841, p. 56 (not 1833); O. 

 Schmidt; Duchass. & Micliel. Sp. Caraib. p. 112. 



Spongia terebrans, Duvernoy, Compt. Rend. A. S. Paris, ii. 1H41, 

 pp. 683 & 1021 ; Lereboullet,^Instit. ix. 1841, p. 131. 



Hymeniacidon, sp., Bowerb. B. Sp. 



Oxyspongice perforantes, Duchass. & Michelot. Sp. Mer Caraibe, 

 p. 112. 



Not Vioa of Nardo, Isis, 1833, p. 523, who cites Alcyonimn asbes- 

 tinum, Linn., as the type, which is a zoanthoid coral. 



1. Cltona. 

 Spicules uniform, pin-shaped, smooth. 



Cliona celata, Hancock, Ann. & Mag. N. H. 1867, six. p. 237, 

 t. 7. f. 7. B.M. 



Hymeniacidon celata, Boweib. B. S. 

 Hab. Europe. 



See also — 



Cliona yorgonoides, Hancock, /. c. p. 237. 



C. globidifera, Hancock, l. c. p. 240, t. 8. f. 3. 



Vioa viridis, O. Schmidt, p. 77, t. 7. f. 14. B.M. 



2. PlONE. 



Spicules of three forms : — 1. Pin-shaped, smooth. 2. Fusiform, 

 spinulose. 3. Cylindrical, sinuous, smooth, slightly or strongly spi- 

 nulose. 



Ptone northumbrica. 



Cliona northumbrica, Hancock, /. c. p. 237, t. 7. f. 1. 

 Hab. Scotland and Northumberland. 



See also — 



Cliona vastijica, Hancock, /. c. p. 237, t. 7. f. 2. 



C. corallinoides, Hancock, /. c. p. 238, t. 7. f. 3. 



C. gracilis, Hancock, I. c. f. 4. ' 



C. howsei, Hancock, f. 5. 



C. mazatlanensis, Hancock, p. 240, t. 8. f. 1. 



3. Myle. 



Spicules of three kinds: — 1. Pin-shaped, smooth, head globular, 

 terminaL 2. Fusiform, thick, smooth, sometimes angularly bent, 

 with a swollen belt at the angle. 3. Oblong, fusiform, small, spi- 

 nulose. 



Myle carpenteri. 



Cliona carpenteri, Hancock, /. c. t. 8. f. 4. 

 Hab. Mazatlan. 



