198 Mr. H. J. Carter on the 



skeleton-spicule ; while those figured in 1862 are respectively stellates 



with an acerate skeleton-spicule. See Schmidt's explanation of this, 



op. cit. 1870, p. 5.) 

 Grayella cyathophora, C. Annals, 1869, vol. iv. p. 189, pi. vii. 

 Cliona corallinoides, Hancock, Annals, 1867, vol. xix. p. 238, pi. vii. fig. 3. 



Also ' Annals,' 1871, vol. viii. pi. ii. figs. 33-37. 



Group 13. Donatina. 



Donatio, aurantium, N ardo, 1833, i Isia, , = Tethya lyncurium, Lam. 1816; 



Annals, 1869, vol. iv. p. 6, pi. ii. tig. 1 &c. 

 Suberites appendiculatus, Balsfimo-Crivelli, 1863, op. cit. vol. v. tav. vi. 



figs. 4 &c. 

 Polymastia, Bk. 1866, op. cit. vol. ii. p. 58, and vol. iii. pis. 10, 11, 12, & 72. 

 Thecophora semisuberites, Sdt. 1870, op. cit. Taf. vi. fig. 2. 

 liinalda uberrima, Sdt. ib. fig. 3. 

 Radiella spinidaria, Sdt. ib. Taf. iv. fig. 7. 



Trachya pernucleata, C. Annals, 1870, vol. vi. p. 178, pi. xii. fig. 11 &c. 

 Axos Cliftonii, Gray, Proc. Zool. Soc. 1867, p. 546, = Dictyocylindrus den- 



tatus, Bk. ib. 1873, p. 321, pi. xxix. 

 Xenospongia patelliformis, Gray, ib. 1858, p. 230, and 1867, p. 547. 

 Halieiiemia patera, Bk. op. cit. vol. ii. p. 96, and vol. iii. pi. xv. figs. 31 & 32. 

 Placospongia melobesioides, Gray, Proc. Zool. Soc. 1867, pp. 128 & 549. 



(Axos Cliftonii, independently of its form, Xenospongia patelliformis, 

 independently of its crust of stellates, and Placospongia melobesioides, 

 independently of its crust of Geodia-like siliceous balls, will, I think, 

 ultimately have to come among the Suberitida; while the spicules of 

 Hymeraphia veHicillata, especially that form which is inflated in the centre, 

 at present thus far find their analogue alone in Halicnemia patera.) 



Family 3. Pachytragida. 



Group 14. Geodina. 



Geodia zetlandica, Johnst. op. cit. p. 195 ; also Bowerbank, op. cit. vol. ii. 



p. 45, and vol. iii. pi. vii. 

 Geodia arabica, C. Annals, 1869, vol. iv. p. 4, pi. i. figs. 9 &c. 

 Pachymatisma Johnstonii, Bk. op. cit. vol. ii. p. 51, and vol. iii. pi. viii. fig. 



1 ; Annals, 1869, vol. iv. p. 8, pi. ii. figs. 7 &c. 

 Stelletta discophora, Sdt. op. cit. 1862, p. 47, pi. iv. f. 5. 

 S. euastrum, Sdt. 1868, Spong. Kiiste v. Algier, p. 20, Taf. iv. f. 4. 



Group 15. Stellettina. 



Stelletta Grubii, Sdt. op. cit. 1862, p. 46, pi. iv. fig. 2. (Found also on the 



rocks at Budleigh-Salterton, South Devon.) 

 S. aspera, C. Annals, 1871, vol. vii. p. 7, pi. iv. figs. 7 &c. 

 S. lactea, C. ib. p. 9, pi. iv. fig. 15 &c. 



Group 16. Tethyina. 



Tethya cranium, Johnst. op. cit. p. 83, pi. i. fig. 1 &c. 



T. arabica, C. Annals, 1869, vol. iv. p. 3, pi. i. figs. 1 &c. 



T. dactylotdea, C. ib. vol. iii. p. 15, fig. 1, and 1872, vol. ix. p. 82, pi. x. 



fig. 1 &c. 

 T. atropurpurea, C. ib. 1870, vol. vi. p. 176, pi. xiii. fig. 1 &c. 

 T. casida, C. ib. 1871, vol. viii. p. 99, pi. iv. 

 Tetilla polyura, Sdt. 1870, op. cit. p. 66, Taf. vi. fig. 8. 



