JOURNAL OF MICROSCOPICAL SCIENCE. 



DESCRIPTION OF PLATE XI, 



Illustrating Fritz Miiller's paper on tlie Common Nervous 

 System (Kolonialnervensj^stem) of the Bryozoa (Poly- 

 zoa), exemplified in Serialaria Coutinhii, n. sp. 



Fig. 

 1. — A portion of Sen'alaria Co^tlinldi, F. Miill. x 6 diam. 



a. The first. 



b. The second. 



c. The third. 



d. The fourth, branches springing from the extremity of the inter- 



node. W. Young radical fibres. 



2. Branch with radical fibres, x 12 diam. 



a. Growing on Fticus, T. 



b. Young radical fibres. 



e. Wart-like buds of ditto. 



3 — 5. — Common nervous system of the Serialaria. Figs. 3 and 4 are x 

 20 diam., fig. 5 x 50 diam. Fig. 3 represents the nervous system 

 of tlie internode, shown in A, fig. 1 ; fig. 4 represents the same from 

 tlie extremity of a branch, giving origin to only two as yet uu- 

 branched twigs. In these figures, G is tlie basal ganglion of the 

 branch ; g, the basal ganglion of the polypides ; h, nerve forming 

 an arch between tlie primary branches of the trunk ; S, the nerve- 

 trunk of the branch ; P, the plexus resting upon the trunk ; and K, 

 the peripheral cord of the plexus running beneath the line of origin 

 of the series of cells. Fig. 4 shows the nerve-trunk and plexus from 

 above; fig. 5, from below. 



6. — Polypide-bud, 0'06 mm. in diameter, ^j', basal ganglion ; e, rudiment 

 of the polypide. 



7. — An older polypide-bud. ff. basal ganglion ; e, rudiment of polypide 

 91, nerve passing from one to the other ; P, nerves of the colonial 

 nerve-plexus. Figs. G and 7 are x 90 diam. 



