100 Proceedings of the Biological Society of Washington. 



the elder Richard, the botanist. The description in general is vague and 

 verbose but they expressly state that: a: the specimen had keeled ventral 

 scales; b: the supraorbital semicircles were separated throughout by a 

 single series of scales; c: that the large occipital shield was in contact 

 with the posterior scales of the semicircles. Pulchellus fulfills the first 

 two conditions but not the last. Bocourt figured what he said was the 

 type of A. richardii (Miss. Sci. Mex. , pi. 15, fig. 6) and the top of the 

 head which he shows fulfills conditions b and c; but he assures us that 

 the specimen came from Martinique! I can match Bocourt's figure 

 (which shows the upper surface of the head only) with our series of sev- 

 eral different Lesser Antillean species but not with A. roquet (Lacepede) 

 of Martinique; no one, however, of these species has keeled ventrals. 

 Indeed, species with such keeled scales are excessively rare, if not un- 

 known, outside of the Greater Antillean district and the mainland. A 

 few forms like A. ferreus, from Guadeloupe, sometimes have the centres 

 of the ventrals swollen but scarcely carinate, in the true sense of the 

 term. Thus the matter stands, and I believe that until the type in Paris 

 can be examined — if it still exists — that it is best to consider A. richardii 

 a synonym of A. pulchellus and that the type was perhaps anomalous or 

 possibly the describers had another specimen in hand or in mind at the 

 moment the description was penned. 



Cyclura pinguis, sp. nov. 



Not closely related to any known species. Remarkable in having a 

 heavy, fat, pendulous nuchal fold with but a few flat inconspicuous tuber- 

 cles representing the nuchal crest ; in having the nostrils rather narrowly 

 oval, comparatively small, slanting, and widely separated from the rostral 

 by two rows of large scales. Color in life, where the skin is freshly shed, 

 dark slaty-gray with rather brilliant blue spots — on the tail each spot 

 confined to a single scale. 



Type, an aged female, M. C. Z. No. 12,082, from Anegada, British 

 Virgin Islands, March, 1917, J. L. Peters, collector. 



Rostral as wide as the mental, not in contact with the nasals; nasals 

 rather small, perforated in an oblique direction, mesially, with a rather 

 narrow elongate opening; each nasal surrounded by many small scales 

 and separated from the rostral by two conspicuous rows of rather large 

 flat scales; no modified supranasals; nasals separated from each other 

 by about four or five polygonal, flat scales, w r hich are similar to those of 

 the whole upper surface of the head ; all upper head scales small, flat, or 

 striate, pavement-like, in this aged specimen, their sutures almost indis- 

 tinguishable; contour scales recalling C. collei but arrangement more 

 similar to that of C. carinata ; no indication of a supraocular disc or 

 nasal horn; occipital very small; eleven supralabials to below the centre 

 of the eye ; about four feebly enlarged and keeled scales forming a weak 

 subocular series; no tubercular or swollen scales in the temporal region, 

 no conspicuously enlarged scales below the angle of the mouth ; infra- 

 labials too indistinct to count; dorsal scales minutely granular; ventrals 



