Reproduction of Lost Parts in the Lobster 375 



uninjured fellows, so tliat it was impossible to distinguish between 

 tlienK 



20, ix. 83. — Has again gone through ccdysis during the past night, and 

 has partially buried its east shell. The right chela now approaches 

 the left in size, and indeed there is no greater difference between them 

 than is usually found [see general table for measurements). The left 

 antenna has now developed a flagellum from a spiral rudiment, formed 

 since last ecdysis. It is, however, still shorter than the right. There 

 is an absence of the brown red colour in this specimen after ecdysis, 

 excepting as an occasional faint stain on some of the joints of the 

 ambulatory limbs and at the apex of the left chela. The colour of the 

 animal is almost a uniform dull prussian blue. The parts (such as 

 the tubercles of the chelae, etc.), which become ultimately more or less 

 red, are now pallid white, with a trace of blue. The antennae are also 

 abnormal in colour, being of a fulvous shade. The antennse still 

 retained this fulvous shade so long as the specimen was kept under 

 observation (28, i. 85). 



13, V. 84. — This specimen passed through another ecdysis during the night. 

 The difference in length between the right and left pincer joints has 

 now been reduced to \ in. 



13, X. 84. — Another ecdysis during the past night, and the specimen has 

 buried its exuvium. The whole animal (9 A.M.) is of a uniform dull 

 Prussian blue colour, as previously described, and without any trace 

 of the red brown usually found after ecdysis. The antennai are 

 fulvous. The whole animal has increased in size, but there is still 

 \ in. difference between the length of the right and left pincer joints. 

 The left antenna has increased 3 in. in length with the present ecdysis, 

 and is now only 2| in. shorter than the right. 



Lobster C. 



7, xii. 82. — Lost smaller chela (left) in a struggle with another lobster. 

 Has also lost both antenufe. 



6, ii. 83. — Lost right chela during the past night, 



13, iv. 83. — Rudiment of left chela about ^ in. long ; that of right, \ in. 

 Both are pallid Avhite, with washes of flesh colour. Have full comple- 

 ment of joints, which, however, are still rigid. No trace of rudiment 

 of right antenna. That of left forms a short hooked process, as de- 

 scribed for Lobster A. 



11, V. 83. — Length of left chelate rudiment, \% in. ; right, t\ in. The 

 left is strongly tinged with pink on the pincer joint, and stained with 

 blue on the basal joints. The rudimentary left antenna forms a pallid 

 white process, the apex of which is spirally twisted in a close coil. 

 The twisted portion forms an obtuse angle with the base, which is 

 somewhat conical. 



29, V. 83. — Length of left chelate rudiment, 1 in, ; right, f in. Latter is 



