OF CRUSTACEA. 375 



Specimens of the larvae and Megalopce of the Macropodia 

 Phalangium, of the larvas of Thelplmsa erythropus and 

 Grapsus pelagicus, will be deposited, for inspection, in the 

 Museum at Chatham, together with specimens of the following, 

 illustrative of metamorphosis in the Macroura : viz. Astacus 

 marinus,^ Palinurus locusta, Crangon vulgaris, and Pagurus 

 Bernhardus, of which latter tribe I have a sufficient number to 

 be enabled to supply also duplicates to the Linnaean Society 

 and British Museum. 



"^ " In the beginning of July last (1835) I procured about two ounces of the 

 eggs of the common lobster, taken by some fishermen at Sherringham, near 

 Cromer, from what they term a sick lobster, i.e. one about to cast its spawn. 

 The whole, having been put into spirits of wine, were of a red colour, except the 

 eyes, which have the appearance of a large black spot on each egg. On opening 

 an egg with a needle, the young lobster was immediately developed, and at the 

 same time a strong colouring liquid exuded from the egg. Among the eggs 

 were a few specimens of the young lobster. Their extreme delicacy and tender- 

 ness rendered it almost impossible to dissect them, but they displayed themselves 

 very beautifully in water, and the extremities might be distinctly seen under the 

 microscope. Blotches of colour were visible in the claw and upon various parts 

 of the body. The eyes appeared in this early state sessile. The double antennae 

 were perceptible, the large claw was distinctly and perfectly formed, and the 

 second leg with the terminal claw well made out. The other legs appeared im- 

 perfectly formed, and to be either very numerous, or mingled with transparent 

 .skin-like appendages, having the appearance of the skins of legs cast off in 

 moulting. The tail was well developed, and was distinctly perceived even in 

 those young which were forced fi'om the egg with a needle. Two specimens of 

 the young, which appeared double, were found, being strongly united at the 

 head. Mr. Travis, a surgeon of Scarborough, clearly alludes to this state of the 

 lobster ; in his letter to Pennant,* he says, ' Though the ova be cast at all times 

 of the year, they seem only to come to life during the warm summer months of 

 July and August: great numbers of them may be found, under the appearance of 

 tadpoles, swimming about the little pools left by the tide among the rocks, and 

 many also, tinder their proper form, from half an inch to four inches in length." — 

 Mr. Brightwell, in No. LI 1 1, of the Magazine of Natural History. — Ed. 



* See British Zoology, vol. iv. p. 12. 



