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Show 5 5 0 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, pi. 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 OP THE PLATES. P l a t e XVII. Fig. 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 oi the right side, X 3. Fig. 4. Abdomen, X 3. Fig. 5. Chela viewed from the outer side, X 3. 6. Ptychoqnathus barbatus A. M.-Edw., male from Atjeli, the cephalotliorax of which is 10'2 mm. broad; anterior half of the upper surface, X 3. P l a t e XVIII. Fig. 7. Palcemon (.Eupalcemon) lar Fabr. var. P. rostrum of the male from Christmas Island, X 2. 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 3rd 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. Fig. 14. Toothing of same leg, X 17. Fig. 15. Leg of the 3rd pair of the female, X 4. 16. Pa hem on (JEupalamon) 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 dartylus is a little loose). Fig. 19. Leg of the 3rd pair, X 2. 7. Note on Heredity in Pigeons. B y R i c h a r d S t a p l e s - B r o w n e , F.Z.S. [Received November 8, 1905.] I . T h e W e b b e d F o o t . I 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 |