466 JANE STEPHENS : ATLANTIC SPONGES 



DESCRIPTION OF PLATES. 

 Plate XXXVIII. 



Fig. 1. Leucophlmus styliferus n. sp. Nat. size. 



Fig. 2. Clatkria rhaphidotnxa n. sp. Nat. size. 



Fig. 3. Tedania scotix n. sp. Nat. size. 



Fig. 4. Polymastia littoralis n. sp. x f . 



Fig. 5. Geodia Littoralis n. sp. x f . 

 Fig. 6. Geodia libera n. sp. x § . 



Plate XXXIX. 



Fig. 1. (a) Hommodictya multiformis n. sp., growing on a specimen of (b) Myxilla simplex (Baer). 



Nat. size. 

 Figs. 2 and 3. Hommodictya multiformis n. sp. Young specimens. Nat. size. 

 Fig. 4. Hommodictya compressa (Esper). Young specimen, nat. size ; with small specimens of (a) 



Esperiopsis informis n. sp., (b) Pocillon hyndmani (Bk.), and (c) Myxilla simplex (Baer), 



growing on its base. 

 Fig. 5. Hommodictya alata n. sp. x ^. 

 Fig. 6. Siphonochalina anonyma n. sp. Nat. size. 

 Fig. 7. Pachychalina hospitalis n. sp. Nat. size. 

 Fig. 8. Reniera saldanhx n. sp. Nat. size. 



Plate XL. 

 Fig. 1. Geodia littoralis n. sp. 



a, somal oxea, x 54; b, cortical anatriaene, x 297 ; c, cortical oxea, x 122; d, mesoprotriaene, 

 x 297 ; e, orthotriaene, x 54 ; /, anatriaene, xl22; g, h, i, choanosomal oxyasters, x 540 ; 

 j, strongylospheraster, x 540; h, outline of sterraster, x 122. 

 Fig. 2. Geodia libera n. sp. 



a, somal oxea, x54; b, cortical anatriaene, x 297 ; c, cortical oxea, xl22; d, anatriaene, 

 xl22; e, dichotriaene, x 54 ; /, protriaene, x 122 ; g, strongylospheraster, x 540 ; h, oxyaster, 

 x 540 ; i, outline of sterraster, x 122. 

 Fig. 3. Polymastia littoralis n. sp. 



a, choanosomal stylus, x 122 ; b, c, cortical stylus and tylostylus, x 122 : d, dermal subtylo- 

 stylus, x 297. 

 Fig. 4. Leucophlmus styliferus n. sp. 



a, large stylus, x 297 ; b, small subtylostylus, x 297. 

 Fig. 5. Microciona tenuis n. sp. 



a, b, c, styli of different sizes, x 297 ; d, dermal stylus, x 297 ; e, toxa, x 297. 

 Fig. 6. Microciona similie n. sp. 



a, b, c, styli of different sizes, x 297 ; d, dermal stylus, x 297 ; e, toxa, x540;/, isochela 

 palmata, x 540. 

 Fig. 7. Tedania scotise. n. sp. 



a, dermal tylotum, x 297 ; b, stylus, x 297 ; c, d, onychata of two kinds, x 540. 

 Fig. 8. Pachychalina hospitalis n. sp. Oxea, x 297. 

 Fig. 9. Siphonochalina anonyma n. sp. 



a, oxea, x 297 ; b, oxea of embryo, x 297. 

 Fig. 10. Siphonochalina tubulosa (Esper). Oxea, x 297. 

 Fig. 11. Esperiopsis informis n. sp. 



a, stylus, x 297 ; b, isochela palmata, x 540. 

 Fig. 12. Hommodictya compressa (Esper). 



a, oxea, x 297 ; b, isochela palmata, x 540. 



