70 



THE ZOOLOGIST. 



hand. At the next moult in July a new limb appeared about 

 half the size of the old one, its growth having, of course, been 

 indicated by a papilla about 1 cm. long projecting from the 

 stump. On July 14th, two days after this new limb appeared, I 

 induced her to throw it off by handling. At the following moult 

 in December another and finer limb had appeared. 



The following table gives the sizes of the chelipeds, chelae, 

 and carapace : — 







Length of 

 Cheliped 



Breadth 

 of Hand 



Length of 

 Hand 



After Jan. 

 moult 1909 



oldlimb 



6 cm. 



1 cm. 



2-8 cm. 





old limb 



6-2 „ 



1 ,, 



2-9 „ 



At July 

 moult 



new limb 



4-2 „ 



•6 „ 



1-9 ,1 



old limb 



6-4 „ 



1-1 „ 



31 „ 



At Dec. 

 moult 



new limb 



4-6 „ 



•7 „ 



2-1 „ 



Carapace, length measured 

 from the tip of. the. rostrum. 



After Jan. 

 1909 moult 



After Dec. 

 moult 



Length 



2-7 



2-85 



Breadth 



3-6 



4<0 



G. strigosa lives well in the aquarium, but is of a very 

 retiring disposition, and always tries to hide in the darkest 

 corners of the tank. They keep themselves wonderfully clean, 

 and do not become overgrown with small algae. When disturbed 

 they swim rapidly, generally on their backs ; if they happen to be 

 at the surface they make a great flapping, and show well the 

 action by which they have earned the name of " Flappers " from 

 the fishermen. 



On the Lobster. 



Lithodes maia, the Stone-Crab, becomes overgrown with 

 small. algae, &c, in the aquarium, as also does the Lobster. The 

 latter, however, cleans them off where he can reach them, as, 

 for instance, round the eyes,; Sometimes also considerable 

 plants of Laminaria (oarweed) grow on the Lobster and Stone- 

 Crab. The former generally keeps them trimmed, especially on 

 its antennae. This natural appearance of weeds on animals in 

 the tanks, which at times must become traps for the spores of 

 algae, &c, brought in by the circulation, is quite a different 

 thing from the dressing of themselves which has been noted in 

 such Crabs as Hyas. A Lobster lately lost an antenna. After 



