SPONGES. -24 > 



PLATE XI. 



Fig. 1. Pwtsperella bidentata ; R.N. 263A. Spicules, x530. 



it-., tylostyle with Imlentate apex; b., //., serrated sigmata; <., anisochela, side view; (/., 



anisochela, front view. 

 2. J'lii'i'^ii'fflln xi'rntliiliiiiiiitta ; R.N. 220c. Spic\iles, x 530. 



a., tylostyle with mncronate apex; />., b., serrated sigmata. 

 3. Paresperelia, sp. Gigantic serrated sigma, x 230. 

 ,, 4. Eehinmliriyiim rlathmtum ; R.N. 325. Spicules, x 230. 



., large stylus ; b., slender stylus ; c., d., oxea ; ?., /., spincd tylostyli. 

 5. M//.iilla h-nuissima ; R.N. 234A. Spicules, x 530. 



a., polytylote ; b,, spined tylostyle ; c., isochela, front view ; d., isochola, side view. 

 6. E.t/M'i-^ln r.rasnisnima : K.N. 240. Spicules, x 230. 



., tylostyle ; b., anisochela, side view ; c., anisochela, front view ; d., sigmata ; e., tricho- 



dragmata. 

 7. Jtaspailia Imnelli ; R.N. 59. Spicules, x 230. a., large stylus; /)., <., small surface styli; </., <-., 



/., g., oxea ; h., h., strongyla ; k., I., in., spincd subtylostyli. 

 8. Hixfoilmiia wsiculatum ; R.N. 212A. Part of dermal skeleton, x 230. 



o., o., o., oxea; .?., .s., strongyla. 

 ,, 9. Hi.iMt'riiin r<'.tii'iil<i>nm ; R.N., 212A. Isocheloe, x 400. a., side view ; /*., front view. 



PLATE XII. 



Fig. 1. Spongosxn-itfs topsenti ; R.N. 152. Spicules, x 52. 



.-/.., various forms of large megascleres ; /., two small oxea ; m., intermediate form. 

 2. Sponyoxtifiti-* (?) Imm-lMa; R.N. 236. 



a. b. f., styli, x 52 ; d., two small oxea, x 52 ; f., small oxeote, x 230. 

 ,, 3. Sponyosot'ites (1) lapidiforum ; R.N. 145. Spicules, x 79. 

 ,, 4. Hynifniaciilon pftrosioides ; R.N. 151. Spicules, x 230. 

 ,, 5. Thrinmopham dwrisaima ; R.N. 355. Spicules, x 230. 



((., stylote; b,, oxeote; r., (L, trichodragmata. 

 6. Tlirimtfit^hom at/iti-ii'lfm-tiiis ; R.N. 160A. Spicules, x 230. 



., /*., c., styli; */., e., oxea; /., trichodragmata. 



7. A.nni'Ua haliclumdrioidca ; R.N. 75. Spicules, x 230.- -n., oxeote; b., f,, stylote. 

 ,, 8. Amnflla wanm ; R.N. 53. Spicules, x 230. 

 ,, 9. Agebufeeyloitica; R.N. 312. Spicules, x 230. 

 ,, 10. Jlliidiili'i-i'inia imUca ; R.N. 341. 



<i., />,,<., rhalxlostyli, x230; d., minute spined styli, x530; i\, contort sigmata, x 530. 



PLATE XIII. 



Fig. 1. CoUocolypta digitata ; R.N. 74. Oxeote spicule from body, x 230. 

 ,, 2. ,, R.N. 74. Part of transverse section of a digitiform process, x 52. 



((.'., axial skeleton of spicules and spongin; il.p., position of dermal pores; eel., collenchy- 

 matous ectosomal tissue; l.r., longitudinal canals; .ajif., septum lietween two longitudinal 

 canals. 



3. PhakMia symmetriea ; R.N. 159. Spicules, x 230. a, b, short styli ; ?, oxeote; d, long stylus. 

 4. Axiwlla tenuitliyitata ; R.N. 202A. Styli, x 79. 



5. Plmkellui eeylonfnsis ; R.N. 34. Spicules, x 230. a, l>, styli ; c, </, e, oxea, 

 G. Phuki'll'M n-iiM.tti/lifpra ; R.N. 256. Three spicules, x 230. 



