6 Ccel, 
CCELENTBRATA. 
Calyptohlastea ; the Gyrnnohlastea-Anthomediisce (E. R. L.), and Calypto- 
hlastea-Leptomedusce (E. R. L.) forming very well defined groups. There 
is a complete account of the general anatomy of the group, and notes 
as to the terms used in elassification by previous authors. 
39. Eapworth, G. On the Geological Distribution of the Ehahdophora. 
Ann. N. II. (6) v. pp. 273-285 & 358-3G9 ; vi. pp. 10-29 & 185-207. 
Groups the Rhahdophora thus 
1. Monograpta. Simple and complex forms of genus Monograptus. 
2. Diplograpta. Variously modified forms of the biserial genus 
Diplograptus. 
3. Didymograpta. Simple, complex, and compound modifications of 
the bilateral genus Didymograptus. 
4. Dicellograpta. Similar variations of the genus Dicellograptus. 
The Rhahdophora^ or true Graptolites, are exclusively Lower-Palaeozoic. 
The three grand groups, 1, 3 & 4, are so restricted in their vertical 
range that each distinguishes a certain portion of the ascending succes- 
sion of formations, and by means of a study of the distribution of the 
Graptolites, the Lower Palaeozoic may be divided into their component 
zones. 
40. . On new British Graptolites. Op. cit. v. pp. 149-177, pis. 
iv. & V. 
Two new genera and one new subgenus are formed for 13 now species. 
41. Mereschkovsky, C. On the origin and development of the ovum 
in Eucope before fecundation. Ann. N. H. (5) v. pp. 498-500. 
42. . Sur Torigine et le d^veloppement de I’oeuf chez la Meduse 
Eucope^ avant la Licondation. C. R. xc. pp. 1012-1014. 
In Eucope the eggs develop from the endoderm cells, and in the egg 
there is no nucleolus visible before fecundation, the nucleus being homo- 
geneous. 
43. Metschnikofp, E. Ueber die intercellulare Verdauung bei Coel- 
enteraten. ZooL Anz. iii. pp. 261-263. 
Intercellular digestion has now been shown to exist in so many types 
of Gcelenterata that it may be considered as the normal method. It has 
been observed in Hydra, Plumularia, and Tubularia, in Eucope, Oceania, 
Tiara ; in Pelagia ; among Siphonophora ; in Praya, Forskalia, Hippo- 
p)odius ; in the Ctenophoran Beroe ; and the Actinian genera Sargartia 
and JEptasia. The author remarks upon its 'absence in the group of 
Trachomeduso5, but it has now been proved to exist in Limnocodium 
sowerhii. 
44. Parker, T. Jeffrey. On the histology of Hydra fusca. Q. J. 
Micr. Sci. xx. pp. 219-224 ; P. R. Soc. xxx. pp. 61-66. 
The fibres connected with the ectoderm cells are muscular and not 
sensory. The supporting lamella is a distinct structureless membrane 
between the muscular layer and endoderm. The endoderm is ciliated, 
each cell bearing two or three large cilia ; its cells become plasmodial, 
and ingest solid particles. 
