AhGM. 169 



Gracilaria filiformis, Earv. & Bail. (Tab. 7, fig. 8, 9.) 



G. fronde spithamcea filiformi gracill e basi dicliotoma pluries divisa, 

 ramis flexuosis, axillis obtusis, apicibus acutis vel subulatis, ramulis 

 lateralibus vix ullis. 



Hab. Under Diamond Hill, Oahu, Sandwich Islands. 



Frond 4 to 6 inches long, as thick as pack-thread, filiform, pretty 

 regularly dichotomous, divided from the base. Axils all rounded, and 

 apices acute. Color a dull red. More regularly dichotomous than 

 G. confervoides. We have not seen the fruit. 



Gracilaria confervoides, Grev. Feejee Islands. 

 Acanthophora muscoides, Grev. ? Feejee Islands. 

 Hypma musciformis, Lamour. Pacific Islands. 

 Hypncea divaricata, Grev. Pacific Islands. 

 Hypno^a rugulosa, Mont. Wailuka, Sandwich, Islands. 

 Hypncea chloroides, Lamour. ?. Var. ramulis deyisissimis scepius 

 midtifidis. 



Hab. Diamond Hill, Oahu, Sandwich Islands. 



Chondrus crispus, Ag. Byron's Bay, Hawaii. 

 Gymnogongrus? dendroides, Harv. & Bail. (Tab. 7, fig. 10, 11.) 

 G. crassus, stipitatiis ; stipite elongato apice in ramoscrebre dichotomos vel 

 irregulares soluto, ramis nunc pluries fur 'cutis nunc vage ramosis flex- 

 uosis ramulis lateralibus fliformibns onustis, axillis rotundatis. apici- 

 bus obtusis, ramis fructiftris nodosis favellidia numerosa foventibus. 



Hab. Cook's Rock and Byron's Bay, Hawaii, Sandwich Islands. 



Fronds tufted, stipitate. Stipe 2 or 3 inches long, ending in a den- 

 droid head of branches, which in young specimens are pretty regu- 

 larly dichotomous, but in older ones irregular by the development of 

 lateral branches. Branches terete, as thick as packthread, much curved, 

 very irregular in division, patent, with obtuse axils and apices; the 

 ramuli widely spreading. Structure exactly as in Gymnogongrus. 

 Favellidia abundant in the ultimate branches, immersed; the branch 

 swelling into knots where favellidia occur. Substance cartilaginous, 

 horny when dry. Color dull brownish-red. Surface rather glossy. 



43 



