and Accqndco Sj^onges. 269 



other where in contact, and with all other kinds of objects in 

 their course. Stitf, but fragile. Colour black. Surface uni- 

 formly reticulate in relief, covered with black dermal sarcode 

 except where the vents, more or less linearly arranged in two 

 rows, present themselves on opposite sides of the cylinder. 

 Internal structure tibro-reticulate, tympanized with black 

 sarcode in the interstices ; fibre round, anastomosing, of a 

 clear golden amber-colour, uniformly cored or axiated with a 

 small but distinct pith of greyish-white microgranular sub- 

 stance ; rigid but fragile, contrasting strongly in its bright 

 colour with the black sarcode ; diminishing in size as it ex- 

 tends upwards and outwards from the centre to the circum- 

 ference, where it ends in simple branches, covered as before 

 stated, unless waterworn by the dermal sarcode. Size of 

 largest caulis or stalk about 18 inches long by half an inch 

 in diameter in its widest part. 



Hah. Marine. Attaching itself to all objects with which 

 it may come into contact while growing. 



Loc. Antigua, Nassau. 



Ohs. The black colour of the sarcode, rigid although fragile 

 fibre, with its distinctly and uniformly axiated character, 

 terminating on the surface in simple branches instead of 

 knotted aggregations, chiefly separate the cauliform Lufarice 

 from those of tlie same form and appearance among the 

 Aplysinoi that will hereafter be described. 



Lvffaria cauJiformis^ var. riifa. 



Tlie same as the foregoing, only of a light brown-red 

 colour. 



Loc. Antigua. 



Ltijfa,ria caidiformis^ var. elongo-reticidata. 



The same as the last, but with the meshes of the fibro- 

 reticulate skeletal structures more elongated and more 

 obliquely directed upwards and outwards from the centre. 

 Colour grey. 



Loc. Nassau. 



General Ohservations. 



The cauliform species of Lvfaria, like the " creeping 

 Cerens'''' [C.jiageUiformis), si.\-q all solid; and of course the 

 vents appear on the surface, as in the cauliform digitate 

 Chah'nce; whileanother kind, although not exactly "cauliform," 

 is long, tubular, and hollow, ex. gr. L. Jisiularis auctt. and 

 L. Ar chert ^ Higgin, in which, of course, all the vents open 



