332 PROCEEDINGS OF THE AMERICAN ACADEMY 



nitida decomposite dichotoma fastigiata, laciniis infra axillas cuneato- 

 dilatatis complanatis, axillis obtusis, apicibus perfossis. 

 Ousima, north of the Loo Choo group. 



29. Gtmnogongrus ligulatus ; var. angustus : fronde stipitata 

 plano-compi'Bssa rigide cartilaginea flabelhformi lineari dichotoma, axil- 

 lis distantibus patentibus, ramis linearibus obtusis apice stepe proliferis. 



Simoda, Japan ; on rocks at low tide. 



30. GiGARTiNA lancifolia : stipite tereti-compresso ramoso ; ramis 

 basi compressis subcanaliculatis apice in folia lanceolata plana ciliata 

 utrinque spinulis conspersa desinentibus. 



Hakodadi Bay, Japan ; on rocks at low tide. 



31. GiGARTiNA AFFiNis : stipite tereti-compresso dichotomo ; ramis 

 frondes dichotomo-decompositas fastigiatas gerentibus, segmentis mar- 

 gine incrassatis subcanaliculatis pluries furcatis, laciniis linearibus, 

 apicibus obtusis ; papillis nuUis ? (Aff. G. mamillosce.) 



With the preceding. 



32. GiGARTiNA TENELLA : fronde pusilla compressa anguste lineari 

 distiche ramosa, ramis alternis sparsisve arcuatis attenuatis, ramulis 

 paucis subulatis patentibus stepius secundis, apicibus acutis. 



Kaikai-sima, north of the proper Loo Choo group. 



33. Halosaccion (Haloccelia) Japonicum, Harv. (charac. 

 emendato) : fronde simplicissima cartilaginea rigida basi et apice at- 

 tenuata ramulis crebris patentibus filifoi'mibus densissime obsessa. 



Hakodadi, Japan. 



34. Halosaccion (Haloccelia) Wrightii: fronde tenui-mem- 

 branacea flaccida simpliciuscula basi et apice attenuata pinnatim ramosa, 

 pinnis pinnulisque patentibus utrinque attenuatis acutis subdistichis. 



Hakodadi, Japan. 



35. Halosaccion (Haloccelia) intestinalis : fronde clavato- 

 intestingeformi longissima simplicissima basi attenuata apice obtusissima 

 coriacea ; strato peripherico crasso filis verticalibus constituto tetra- 

 sporas oblongas includente. 



Arakamtchetchene Island, within Behring's Straits. 



36. Gloiopeltis coliformis : fronde intestinaeformi membranacea 

 (filo centrali mox evanido) cava et inflata subsimplici basi et apice 



I 



