Classification of the Spongida. 199 



Family 4. Pachastbellida. 



Group 17. Pachastkellina. 



Pachastrella abyssi, Sdt. 1870, op. cit. p. 64, Taf. vi. fig. 4. 



Dercitus niger, C. Annals, 1871, vol. vii. p. 3, pi. iv. fig. 1 Sec. = Dercitus, 



Gray, Proc. Zool. Soc. 1867, p. 542, = Hymeniacidon Bueklandi, Bk. 



op. cit. 1864, vol. ii. p. 226, = Battersbya Bueklandi, Bk. vol. iii. 1874, 



pi. xcii. fig. 8. 



Group 18. Lithistina. 



MacAndrewia azorica, Gray, Proc. Zool. Soc. 1859, p. 438, Rad. pi. xv. ; 



ib. 1867, p. 507. 

 Corallistes, Sdt. 1870, op. cit. p. 22 &c. See Taf. iii. for illustrations. 

 For other species see ' Annals/ 1873, vol. xii. p. 437. 



Family 5. Potamospongida. 

 Group 19. Spongileina. 



Spongilla, Lam. 1816, vol. ii. p. 98, =Badiaga, Buxbaum, in Spreng. Syst. 



Veg. iv. p. 374. 

 S.Jluviatilis, Jonnst. op. cit. p. 159, pis. xvii. & xviii. 



For Bombay species see ' Annals,' 1849, vol. iv. p. 81, pis. 2, 4, and 5 ; 

 and for species generally see " Monograph " by Bowerbank, Proc. Zool. 

 Soc. 1863, pi. xxxviii. 



Order VII. HEXACTINELLIDA. 

 Family 1. Vitreohexactinellida. 

 Group 1. Patulina. 

 Dactylocalyx pumiceus, Stutckbury, Proc. Zool. Soc. 1841, p. 86. 



Group 2. Tubulena. 

 Euplectella aspiergillum, Owen, Trans. Zool. Soc. vol. iii. p. 203, pi. xiii. 



Group 3. Scopulieera. 



Aphrocallistes Bocagei, Wright, Quart. Journ. Microscop. Soc. vol. x. N. S. 

 p. 4, pi. i. 1870. 



Family 2. Sarcohexactinellida. 

 Group 4. Rosettifera. 



Crateromorpha Meyeri, Gray, Annals, 1872, vol. x. p. 112. 



Rossella, C. ib. 1875, vol. xv. p. 113, pi. x., see for all known species. 



Group 5. BlROTUXIFERA. 



Hyalonema Sieboldii, Gray, Proc. Zool. Soc. 1835, p. 65. 

 H. lusitcmicum, Bocage, ib. 1864, p. 265, pi. xxiii. 

 H. cebuense, Higgin, Annals, 1875, vol. xv. p. 377, pi. xxi. 

 Holtenia Carpenteri, Wy. Thomson, 1869, Phil. Trans, p. 701, pis. lxvii.- 

 lxxi. 



