130 BARBOUR: ZOOGEOGRAPHY. 



1854, 7, 2, p. 1337) record a specimen taken by Quoy and Gaimard at Makassar, 

 Celebes. Schlegel, in Fauna Japonica (PI. 8), figures this form; and Stejneger 

 (loc. cit., p. 440) states that the figured specimen came from the west coast of 

 Borneo. Russell in 1796 figured a specimen from Tranquebar, on the Coro- 

 mandel Coast. In the collection of the M. C. Z. No. 938 is typical of this form, 

 and was taken at Singapore. 



This variety is still rare in collections, and curiously enough was apparently 

 not observed by Cantor during his residence in the Straits Settlements. 



As regards the var. maculata Jan, little can be said. There are no specimens 

 here, and it appears to be rare. Boulenger described it (B, he, cit., p. 267), 

 but had in the British museum no specimens from known localities. It is sup- 

 posed to be confined to the Indian Ocean. It may be intermediate between H. 

 p. ornatus and some of the black-backed phases, all of which are a good deal alike. 



The forms having the whole dorsal surface black or broken into confluent 

 rhombic markings occur very widely and promiscuously. There seems to be no 

 localization whatever amongst them. In 1906 I recorded (Bull. M. C. Z., 46, 

 p. 227) three color-phases from the Bay of Panama; now, however, a re-examina- 

 tion of this material, and the study of additional specimens, show six phases 

 occurring in this circumscribed area. Boulenger (lac. cit., p. 267-268) likewise 

 shows that four phases occur on the coasts of India. Here, there are several 

 well-marked phases from the China Sea. It is hardly necessary to discuss these 

 forms in detail, for Boulenger has already described them. However, the series 

 from Panama does contain tw^o specimens which are noteworthy. One from 

 Saboga Island (ex. No. 7,084, 12 specimens) may be described as follows: — 

 Dorsum black, entirely composed of confluent rhombs; lower surface olive; a 

 yellow stripe along the side separating black from olive. In the area of the 

 latter color occurs a series of black spots, which alternate with the dorsal rhombs. 

 On the tail are alternating bands which arise dorsally and ventrally dovetaiUng 

 into one another. 



The specimens of the second lot are from San Miguel Island (ex. No. 7,083, 

 14 specimens), and have a black dorsum and brown belly, but lack the j'ellow 

 stripe on the sides which separate these areas. 



These phases may be confined to the Panamic region; but in the light of 

 what we know of the distribution of nearly related forms, it seems much more 

 likely that they are rare phases simply, and may turn up almost anywhere in 

 the Indian and tropical Pacific Oceans. 



