REPTILIA. 287 



Anolis nelsoni, sp. nov. 



Type: — No. 7,892, M. C. Z. an adult male from Swan Islands, Caribbean 

 Sea, March, 1912, George Nelson, collector. A large series of paratypes. 



This species belongs with those having in the male a tail strongly compressed 

 especially along its upper edge; ventral scales keeled; supraorbital semicircles 

 separated by one row of scales. Thus its nearest relatives are A . sagrei Dum. & 

 Bibr. and A . lineatopus Gray. It is more similar to the former than to the latter 

 species. 



It is so conspicuously different from both species that it is only necessary to 

 point out the distinguishing characters. It differs from A. lineatopus Gray in 

 having a slightly more pointed snout; in having all the scales of the head and 

 snout much larger. The frontal ridges enclose but two or three instead of three, 

 four or even five series of small scales. The ridges themselves consist of but 

 three much elongated scales instead of five - six much less prominent scales. The 

 scales of the whole snout region are much larger and more strongly keeled than 

 in the Jamaican species. The dorsal scales are similar in size and character. 

 The ventrals of A. nelsoni are keeled and have the keels forming continuous 

 ridges as in A . sagrei. The nuchal and dorsal fold as well as the crest of the tail 

 is much more strongly developed in the Swan Island species than in either of its 

 relatives. From A . sagrei it may be distinguished at once by its dewlap color, 

 deep olive-gray instead of naming orange almost pink. The ventrals are also 

 smaller and less strongly keeled. The head scales are similar in arrangement 

 but larger and much more strongly keeled. The dorsal scales are not feebly 

 keeled and while very small are nevertheless imbricate and strongly keeled. 

 There can be no question as to the close relationship of these two species yet the 

 Swan Island form is strongly differentiated. 



Mr. Nelson's field notes show that this lizard is excessively abundant in all 

 situations on both islands. He remarks that they change color very freely. A 

 few young examples especially preserved to show their brilliant marking are 

 noteworthy in having a brilliant lemon-yellow head, besides the usual gray 

 rhombs in a blackish area, as is seen in A . sagrei. 



Anolis greyi, sp. nov. 



Type: — No. 7,890, M. C. Z. an adult male, Camaguey (Puerto Principe), 

 central Cuba. March, 1909, Thomas Barbour, collector. Three cotypes. 

 Other specimens from the original series in the U. S. national museum. 



When I identified the collection made in Cuba in 1909, 1 mistook this species 



