196 Mr. H. J. Carter on the 



Group 4. ECHINOCLATHRATA. 



Halichondria seriata, Johnst. op. tit. p. 125, pi. xiv. fig. 2, = Chalina 

 seriata, Bk. op. tit. vol. i. p. 376, and vol. ii. pi. xvii.. fig. 287. 

 For other species see Part III. 



Group 5. Baculifera. 



Caulosponyia plicata, Kent, Proc. Zool. Soc. 1871. 

 C. verticillaris, Kent, ib. 



Family 2. Axinellida. 

 Group 6. Multiformia. 



Halichondria hispida, Johnst. op. tit. p. 4 (Johnstonian Collection, 



British Museum), = Dictyocylindrus hispidus, Bk. op. tit. vol. ii. p. 



108, and vol. iii. pi. xvii. 

 Axinella tiimamomea, Sdt. op. tit. 1862, p. 61, Taf. vi. fig. 2. 

 Acanthella, Sdt. ib. p. 60, Taf. vi. fig. 7. A. acuta, Sdt. 

 Halichondria ventilabrum, Johnst. op. tit. p. 107, pi. vii., =Phahellia 



ventilabrum, Bk. op. tit. vol. iii. pi. xxii. 

 Hymeraphia vermiculata, Bk. op. til. vol. ii. p. 141, and vol. iii. pi. xxvi. 



fig. 1. (There is an erect form of this species, which thus passes into 



H. ventilabrum.) 



Group 7. Burissima. 

 For species see Part III. 



Order VI. HOLORHAPHIDOTA. 



Family 1. Renierida. 



Group 1. Amorphosa. 



Halichondria panicea, Johnst. op. tit. p. 114, pi. xxxi.,= Halichondria 

 panicea, Johnst., Bo werbank, 1864, op. tit. vol. iii. (1874), pis. xxxix. 

 &xl. 



Group 2. Isodictyosa. 



Isodictya rosea, Bk. op. tit. vol. ii. p. 282, vol. iii. pi. xlix. fig. 12. 

 I. rations, Bk. vol. ii. pi. xx. fig. 309, see for characteristic arrangement 

 of the spicules of this group. 



Group 3. Thalvosa. 



TJialysdas, D. et M. op. tit. p. 82. 

 T. subtriangularis, D. et M. ib. p. 85, pi. xvii. fig. 1. 

 Isodictya mirabilis, Bk. Proc. Zool. Soc. 1873, p. 319, pi. xxviii. 

 ? Spongia clavata, Esper, 1794, Taf. xix. 



Schmidtia clavata, Balsamo-Crivelli, 1863, Atti d. Soc. Ital. d. Sc. vol. v. 

 tav. iv. fig. 11. 



Group 4. Crass a. 



? Reniera calyx, Sdt. 1862, op. tit. p. 76, Taf. vii. fig. 12. (A type spe- 

 cimen is in the British Museum.) 

 For other species see Part III. 



Group 5. Fibulifera. 



Reniera fhdata, Sdt. 1862, op. tit. p. 73, Taf. vii. fig. 9. (A worldwide 

 species.) 



