OSTREACEA. 
179 
ago as 1730 and even 1650. The oysters from these estuaries 
exhibit only Balanus crenatus (Brug.), instead of the two other 
Cirripeds mentioned above. Metzger, JB. Ges. Hannov. 1869- 
70, pp. 28, 29. 
The breeding of oysters is the subject of an interesting 
pamphlet written by Prof. Karl MoBitis. He has visited 
the French and English establishments for this purpose, and 
comes to the conclusion that those in France, although great 
expense has been gone to, do not at all answer to the san- 
guine hopes which have been entertained. Concerning the 
English establishments, he thinks that they are still too new to 
admit of conclusive judgment. He then describes the natural 
oyster-banks on the western shores of Slesvick, and discusses in 
what manner they may be improved by keeping them clean from 
mud and destructive animals. The pernicious influence of long 
frost is observed (these observations will be found also in Zool. 
Gart. 1870, pp. 133, 134) ; and the hope that they may be 
artificially bred with success in the Baltic, where they do not 
live spontaneously, is contradicted by referring to several trials, 
all made without success. Several little maps are added in 
order to illustrate the geographical situation of the oyster-banks 
spoken of in Southern and Western France, in England, and in 
SlesHc. 
Another ofllcial report by A. Tolle concerning a journey to 
visit the oyster-breeding establishments in England and France, 
bearing the date 1871, but really published in December 1870, 
treats chiefly of the statistics, topography, and instruments of 
these establishments on the various shores of France and those 
near the mouth of the Thames. 
Ostrea edulis (L.) and O. hippopus (Lam.) both occur on the 
western shores of Schleswig since time immemorial, and are 
used as food by man j intermediate forms do not occur, but 
certainly approximative^^ ones. Friedel, Mai. Bl. xvii. pp. 79, 
80. [This modifies a former statement, Zool. Rec. iv. p. 692.] 
The Belgian oyster-banks are the subject of a short communication by 
Lanszweert, Ann. mal. Belg. pp. xvii, xviii. 
Colbeau has observed that oysters remained alive, when taken 
from the water, for fourteen days, March 23 to April 5. Ann. 
mal. Belg. iii. (1868) p. xx. 
Ostrea paullucciee (Crosse) figured, J. de Conch, xviii. pi. 2. fig. China. 
