726 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxv. 



Fig. 9. Ptilosarcus quadrangalaris. Section of leaf to show ova and septa between 

 leaf chambers. 



10. Ptilosarcus quadrangular is. Surface view of portion of zooid band, enlarged. 



11. Ptilosarcus quadrangularis. Cross section of rachis, showing zooids and muscle 



bands. 



Plate LXXXVI. 



Fig. 1. Ilalisceptrum cystiferum, new species, somewhat reduced. 



2. Stylatula elongata. Dorsal and ventral views of distal part of colony. Pho- 



tographed from living specimens, slightly reduced. 



3. Acanthoptilum gracile. Dorsal view of part of rachis, enlarged. 



4. Acanthoptilum gracile. Ventral view of part of rachis, enlarged. 



5. Acanthoptilum album, new species. Parts of colony, reduced. 



6. Acanthoptilum album. Dorsal and ventral views of part of rachis, enlarged. 



7. Acanthoptilum album. Lateral view of leaves. 



8. Acanthoptilum album. Fragments, showing polyps. 



9. Acanthoptilum seal pell if or me. Dorsal view, enlarged. 



10. Acanthoptilum seal pell if or me. Ventral view, enlarged. 



11. Acanthoptilum annulatum, new species. Part of colony, reduced. 



12. Acanthoptilum annulatum. Ventral view of part of rachis, enlarged. 



13. Acanthoptilum annulatum. Leaves, showing polyps, enlarged. 



Plate LXXXVII. 



Fig. 1. Balticina pacifica, new species. Parts of colony, somewhat reduced. 



2. Balticina pacifica. Part of rachis, showing polyps, enlarged. 



3. Ilalipteris contorta, new species. Parts of colonies, slightly reduced. 



4. Ilalipteris contorta. Part of colony, enlarged, showing calyces. 



5. Stachyptilum superbum. Parts of rachis showing ventral and dorsal views, 



and of stem, about natural size. 



6. Stachyptilum superbum. Ventral and dorsal views of part of rachis, enlarged. 



7. Stachyptilum quadridentatum., new species. Part of rachis, somewhat reduced. 



8. Stachyptilum quadridentatum. Part of rachis, ventral aspect, enlarged. 



9. Umbellula loma, new species. Two views of rachis, and one of proximal part 



of stem, about natural size. 



10. Distichoptilum verrillii. Portions of colony, somewhat reduced. 



11. Renilla amethyst ina. Colony with expended polyps, slightly reduced. 



Plate LXXXVI II. 



Fig. 1. Plumarella longispina. Part of colony, somewhat reduced. 



2. Plumarella longispina. Branches, enlarged. 



3. Eumuricea pusilla, new species. Fragments, somewhat reduced. 



4. Eumuricea pusilla. Parts of branches, enlarged. 



5. Psammogorgia simplex, new species. Parts of colony, somewhat reduced. 



6. Psammogorgia simplex. Parts of branches, enlarged. 



Plate LXXXIX. 



Fig. 1. Psammogorgia torreyi, new species. Pari of colony, somewhat reduced. 



2. Psammogorgia torreyi. Ends of branchlets, enlarged. 



3. Psammogorgia spauldingi, new species. Colony with expanded polyps, some- 



what reduced. 



4. Psammogorgia spauldingi, end of branch with expanded polyps, enlarged. 



5. Stenogorgia hofoidi. new species. Colony, somewhat reduced. 



6. Stenogorgia kofoidi. Portion of branch, enlarged. 



