CCELENTERATA. 651 
Anat. Harvard College, Camb. Mass. No. 13. Nov. 1869, 
pp. 363-386. 
One of the most important results of this cruise is thus men- 
tioned by Professor Agassiz : — Corals undergo a succession of 
changes peculiarly their own, and yet hardly less marked than 
the embryonic changes already known among many animals.^^ 
Crespigny, C. i)e. Notes on the friendship existing between 
the Malacopterygian Fish Prernnas biaculeatus and the 
Actinia crassicornis. Proc. Zool. Soc. 1869, pp. 348, 249. 
Gray, J. E. Descriptions of some new genera and species of 
Alcyonoid Corals in the British Museum. Ann. & Mag. 
N. Hist. ser. 4, vol. iii. Jan. 1869, pp. 21-23 (woodcut). 
. Notes on the fleshy Alcyonoid Corals i^Alcyonium, Linn., 
or Zoophytaria carnosa). Ibid., Feb. 1869, pp. 117-131. 
. On Berbyce mollis^ a new British Coral. Ibid., March 
1869, p. 246. 
Gray, J. E., fe Carter, IT. J. On Spoggodes conglomeratus, 
sp. n., and on a new genus of Fleshy Alcyonoids. Ibid, 
vol. iv. Nov. 1869, pp. 360, 361. 
Hackel, Ernst. TJeber die Crambessiden, eine neue Medusen- 
Familie aus der Rhizostomeen-Gruppe. Zeitschr. f. wis- 
sensch. Zoologie, xix. Bd. 4. Heft, Nov. 6, 1869, Taf. 38, 
39, pp. 509-537. 
A description of a new genus and species belonging to a new 
family of the Rhizostomeay with an analysis of the families of 
this order. This memoir is the result of several days^ labour 
when the author was doing quarantine in the Tagus en route to 
the Canary Islands. 
. Zur Entwickelungsgeschichte der Genera Physophora, 
CrystallodeSy Athorybia iind Reflexionen fiber die Entwicke- 
lungsgeschichte der Siphonophoren im Allgemeinen. 
Utrecht, 1869, pp. 1-119, plates 1-14 (some coloured). 
This is a prize essay read before the Academy of Utrecht, 
and contains the result of investigations carried on during the 
winter of 1866-67 at Lanzarote into the development of the 
Siphonophora. The memoir gives : — 1. An historical survey of 
the subject; 2. Remarks on the elementary form and topo- 
graphy of the Siphonophorous larvae ; 3. On the development 
of Physophora\ 4. Description of some varieties and mon- 
strosities of Physophorous larvae ; 5. Systematic remarks on the 
new genus of Agalmidae, Crystallodes ; 6. On the development 
of Crystallodes] 7. Experiments on the multiplication of the 
larvae of Crystallodes by artificial division; 8. Description of 
some varieties and monstrosities of Crystallodes ] 9. Develop- 
ment of Athorybia ; and 10. Reflections on the peculiar develop- 
2 Y 2 
