injured at the point, a new segment is often thrown out from the injured 

 part. Spore-cavities {scaphidia) are produced in unaltered lateral segments, 

 and finally cover the whole surface of the segment in 4-6 rows ; they con- 

 tain both antheridia and spores. The colour is a dark olive-brown, turning 

 black in drying. Substance leathery, discharging much mucus in fresh- 

 water. 



At Plates XLIII. and CXXVIII. are figured two other species 

 of Carpo^lossiwi, both easily distinguishable from each other, and 

 neither likely to be confounded with the subject of our present 

 Plate. This latter was first found by Mr. R. Brown, who named 

 it " conjluens," because its several parts seem almost to melt into 

 one another; the midrib passing insensibly into lamina; the 

 lamina into stem ; and the leaf-like branches into half-formed 

 receptacles. 



It commences to grow about low-water mark, and gradually 

 increases in size as the water deepens. Specimens raised from 

 the deeper parts of the Laminarian zone are much more branched, 

 with longer and far narrower segments than the one here chosen 

 for illustration. 



Fig. 1. Carpoglossum confluens, — the natural size. 2. Section of a sca^^i- 

 dium. 3. A spore. 4. A tuft of antheridia : — variously magnified. 



