THE COLLECTION OV MISS H. GATTT. 159 



Plate XII. 



Figa. 1, 2. DiPHASiA bipinnata, n. sp. — 1. A colony; natural size. 2. Portion 

 of a pinna with female gonangium ; magnified. 

 3, 4. Syntheoium eamosum, n. sp. — 3. A colonj' ; natural size. 4. Por- 

 tion ; maguified. 



Plate XIII. 



Figs. 1, 2. Sektclaria aperta, n. sp. — 1. A colony ; natural size. 2. Portion ; 

 magnified. 



3, 4. Sertularia minima, D'A. W. Thompson.— 3. A colony, natural 

 size, creeping over the surface of a species of Sargassum. 4. Portion 

 of a colony with gonangium ; magTiified. 



5-7. Sertularia unilateralis, n. sp. — 5. Portion of a colony ; natural 

 size. 6. Portion, magnified, with origin of a gonangium. 7. Gonan- 

 gium; magnified. 



Plate XIV. 



Figs. 1, 2. Sertularia crinis, n. sp. — 1. Natural size. 2. Portion of a colony 

 with gonangium ; magnified. 



Plate XV. 



Figs. 1-6. Sertularia elongata, Lamx. — 1. A colony, natural size ; form 

 from Tasmania. 2. Proximal end of a pinna, with origin of gonan- 

 gium ; magnified. 3. Gonangium ; magnified. 4. Form from West 

 Australia. 5. Proximal end of pinna, with origin of gonangium ; 

 magnified. 6. Gonangium ; magnified. 



Plate XVI. 



Figs. 1, 2. Sertularia crinoidea, n. sp. — 1. Natural size, growing over a sea- 

 weed. 2. Portion of a colony ; magnified. 

 3, 4. Sertularia AMPLECTE>fS, n. sp. — 3. Colony, natural size, growing 

 over the surface of floating gulf- weed. 4. Portion of a pinna ; mag- 

 nified. 

 6-7. Sertularia megalocarpa, n. sp. — 5. Natural size, growing over 

 a seaweed. 6. Portion of a colony, with gonangium ; magnified. 

 7. Distal portion of hydrotheca ; still further magnified. 

 8-10. Thuiaria interrupta, n. sp. — 8. Colony ; natural size. 9. An in- 

 ternode of a pinna ; magnified. 10. Portion of stem with origin of 

 two pinnae ; magnified. 



Plate XVII. 



Figs. 1-4. Desmoscyphus orifissus, n. sp. — 1. Natural size. 2. Portion of 

 pinna, lateral view ; magnified. 3. Portion of pinna, front view ; 

 magnified. 4. Gonangium. 



