550 MR. R, STAPLES-BROWNE ON [Dec. 12, 
Reunion, ought to be regarded as a, probably local, variety of 
Pal. lar Fabr. 
The male from Christmas Island bears a close resemblance, 
indeed, to Pal. altifrons Hend. from British India (Delhi, River 
Jumna, Lahore), described and figured in Trans. Linnean Soc., 
2nd ser. Zool. vol. v. 1893, p. 444, pl. 40. figs. 4-6. The carapace 
of Pal. altifrons is, however, slightly scabriculate anteriorly, and 
the rostrum appears considerably higher above the lateral carina 
than below it and than in the specimens from Christmas Island ; 
the carpus of the 2nd legs, finally, has also a less stout shape. 
EXPLANATION OF THE PLATES. 
Prate XVII. 
.1. Ptychognathus pusillus Heller, male from Christmas Island, x 2. Fig. 2. 
Front, epistome &c., viewed from before, X 3. Fig. 3. External maxil- 
lipede of the right side, xX 3. Fig. 4. Abdomen, X 3. Fig. 5. Chela 
viewed from the outer side, X 3. 
6. Ptychognathus barbatus A. M.-Edw., male from Atjeh, the cephalothorax 
of which is 10°2 mm. broad; anterior half of the upper surface, X 3. 
Ki 
Wie} 
Puate XVIII. 
Fig. 7. Palemon (Hupalemon) lar Fabr. var. ?, rostrum of the male from Christmas 
Island, x ¥. Fig. 8, left, fig. 9, right leg of the 2nd pair of the male, 
x 2. Fig. 10. Toothing of the fingers of the left leg, x 8. Fig. 11. 
Leg of the 8rd pair of the male, X 2. Fig. 12. Rostrum of the female 
from Christmas Island, x 2. Fig. 13. Left leg of the 2nd pair of this 
female, X 2. Wig. 14. Toothing of same leg, X 17. Fig. 15. Lee of 
the 3rd pair of the female, x 4. 
16. Palemon (Eupalemon) lar Fabr., rostrum of the male from the River 
Palopo, Celebes, X 2. Fig. 17. Leg of the 2nd pair of the male, x 2. 
Fig. 18. Toothing of the fingers of same leg, x 17 (the dactylus is a little 
loose). Fig. 19. Leg of the 3rd pair, < 2. 
7. Note on Heredity in Pigeons. 
By RicHarp Srapies-Browne, F.Z.8. 
[Received November 8, 1905. } 
1. THE WEBBED Foot. 
T received in 1902 a Pigeon with webbed feet, and, thinking it 
would be interesting to investigate the inheritance of this 
character, I made the following experiments with it. 
There is no established strain of web-footed’ Pigeons, but 
specimens so webbed are occasionally met with among domestic 
birds. The character has been found in the Dove-cot Pigeon 
and Working Homer, also in the Show Homer, Dragon, Magpie, 
Tippler, Tumbler, Jacobin, and Pouter. I have myself bred birds 
in the F. 4 generation of a cross between a Barb and a Fantail, 
which showed this character to a considerable extent. 
So far as I can at present judge from specimens recorded by 
breeders, the most common type is a web between two digits 
