10 God. 
XVI. CCELBNTERATA. 
Mr. Bourne’s views as to the cause of the detachment of the 
anthocyathus from the anthocaulus are expressed as follows : — “ It 
appears that the soft tissues undergo degeneration at the point where the 
anthocaulus passes into the anthocyathus. The decay and death of the 
tissues is followed by degenerative changes in the corallum, which is then 
more liable to the inroads of Achy la penetrans, the parasite hastening the 
process which has been begun by the decay of the tissues, and which may 
be completed in its absence by the solvent action of sea-water, a process 
which would be necessarily very slow.” 
Brook (16), in discussing the affinities of the genus Madrepora , points 
out that in the bilateral arrangement of the septa the genera Anacropora 
and many Montiporce show affinities with Madrepora , which are not 
shared by any other genus. Madrepora , however, stands alone in having 
axial corallites and radial bud corallites. The characteristic mode of 
colony formation in Madrepora is confined to the formation of inde- 
pendent branches ; but in all colonies, so long as incrustation continues, 
the mode of budding is not characteristic. 
Yon Koch (51) states that in Madrepora echidnaea and M. surculosa 
the skeleton of the buds arises from processes on the costae of the 
mother-calyx. Connecting pieces are then formed, which become 
the rudiments of the calyx. The young calyx then becomes like a 
martin’s nest attached to the present calyx. The septa and calyx 
of the bud are formed entirely from these processes of the costae of 
the parent. 
III.— FAUNISTIC. 
Duerpen (29) gives a list of the Ilydroidca of tho S. W. coast of 
Ireland. Eighteen species are recorded for the first time from this 
locality. 
Pictet (66) gives a list of the Hydroidea collected in the Bay of 
Amboyna, and calls attention to the fact that in the tropics the number 
and size of the Hydroids are smaller than in temperate seas. 
Wood (83) gives a list of the Hydroids collected in the Isle of Man. 
Nordgaard (62) & Norman (63) give lists of Ccdenterata caught in 
the Trondhjem Fjord in Norway. 
Lankester (53) calls attention to the fact that for three years 
Limnocodium did not appear in the Regent’s Park tank, but in the begin- 
ning of June, 1893, it made its reappearance in the Victoria regia tank 
at Sheffield. This tank was probably infected by the transference of 
water plants from Kew in 1892-3. The author gives a list of the dates 
of appearance of Limnocodium. 
Guerne (33) calls attention to the freshwater Medusa , 20-25 mm. in 
diameter, stated to occur at Bamakou by Dr. Tautaiu. 
Maas (59) states that of the 116 Medusae caught by the Plankton Expedi- 
tion only 9 were coast forms. No genera of Craspedota which occur north 
