MISCELLANEOUS. JAPANESE SILKWORMS' EGGS. Over 200 cases of Japanese silkworms' eggs have arrived in New York City, consigned to English houses, through which they are to be forwarded to Italy. These shipments were landed in San Francisco on the 21st ult. by the China and Colorado, of the Pacific Mail Steam-ship Company. The majority of the cases are three feet long by one in breadth and ten inches in depth, the average contents of each being 250 cards of eggs. Some of the cases are considerably larger, and contain upwards of 600 cards. The cases are dovetailed carefully, and hermetically covered with oiled paper and again with matting. The value of the eggs is set down at 100,000 dollars gold.