brevibus vel verrucæformibus tenuioribus plus minusve dense in- 

 structa, apicibus rotundatis vel obtusis; conceptaculis sporangiferis 

 convexiusculis vel piano- convexis, parum prominentibus, a super- 

 ficie visis diametro 250—300 fi, demum innatis; sporangiis binas 

 sporas foventibus, 90 — 120 ;x longis, 35 — 45 p latis. Fig. 1 — 5. 



Syn. Corallium pumilum Ellis, Corall. p. 83, p. 27, fig. C, No. 1? 



Description of the spedes. Of this plant I have seen six spe- 

 cimens, five of -which are represented fig. 1 — 5. The frond is 

 simple or nearly simple, curved or angularly bent, its longest dia- 

 meter 1.3— 2 cm. by a thickness of 2 — 3 mm. It appears frequently 

 to be more or less densely furnished with short branchlets or wart- 

 like processes, which are rather varying in thickness, 0.5—1.5 mm. 

 The ends are rounded or obtuse, and the surface is either smooth 

 or, more frequently, provided with scaly thickenings. 



With reference to structure the cells of the outer layers of 

 tissue are, in a median longitudinal section of the axis, nearly 

 square or rectangular, about 7 — 10// long and 6— 8 ft thick. The 

 more or less cup-shaped layers in the peripherical portions partly 

 are pretty regular partly the stratification rather disturbed by bur- 

 ried conceptacles. The central portion in the specimen examined 

 are much destroyed by numerous perforating algæ. 



I have seen but some few conceptacles of sporangia. These 

 organs appear to be scattered over the whole frond, now and then 

 two or three confluent or nearly confluent, convex but very little 

 prominent and not distinctly marked, at least towards maturity 

 rather flattened, 250—300 fi in diameter seen from the surface. 

 The roof is rather thick, and the muciferous canals first visible in 

 a rather late stage. I have numbered about 30 of the latter. All 

 the sporangia that I have seen in superficial as well as overgrown 

 conceptacles were bisporic, in the former apparently mature, and 

 about 90-— 120 \i long and 35—45 /* broad. 



A couple of other conceptacles with a small central portion 

 of the roof dissolved, probably are those of cystocarps. They 

 appear to have been conical, very low, and are about 300 /-i in 

 diameter at the base. Some rather deep scars with slightly eie 

 vated edges, not unlikely, are from these organs. 



