682 REPORT OF NATIONAL MUSEUM, 1902. 



verse row (postg-eneials); 240 ring-s on the bod}' and 10 on the tail; the 

 8eg-ments square, slightl}' longer than })road on the back, the 6 median 

 rows on the abdomen broader than long, especially the middle pair; 

 16 above and 1C> ])elow the lateral line; anal shields or segments, 6; 

 preanal pores, 4. Color light Hesh, with a bi-ownish spot in the center 

 of each segment, rather indistinct, especially on the lower surface. 



Dhnensinns. 



mm. 



Tip of snout to vent 260 



Tail : 18 



Diameter of Ixxi y 9 



Varlatuni. — Apart from a slight oscillation in the relative length of 

 the sutures on the head the variability is insignificant. As in ^4. cpeca^ 

 the occipitals appear most subject to variation, but they seem to be 

 longer than l)road, as a rule, even in the ch^irly a))normal specimen 

 (No. 255H7) as shown in lig-. i?A. The number of rings varies only 



134 136 I 137 ' 



Figs. 134-137.— Amphisb.eka bakeri. 2^ x natural size. 134, top of head; 135, siileof head; 136, under- 

 side of head; 137, anal region. No. 25r);37, V. S. N. M. 



between 249 and 251 in the three specimens at hand, but more specimens 

 will undoubtedly show a o-reater range, though probably not more than 

 a difference of ten, as in A. civva. 



The ventral segments vary between 16 and IS in our specimens, but 

 otherwise the scale formula is constant. The eye is plainl}^ visible in 

 No. 27458. 



JIahltat. — Apparently confined to Porto Rico. The only definite 

 locality whence we have specimens is Lares, where Mr. A. B. Baker 

 collected two specimens. A third one was sent by Mr. (Charles E. 

 Adams from Porto Rico without any record as to the place where it 

 was actually taken. 



Remarks. — In addition to the characters pointed out in the key and 

 diagnosis, this interesting- novelty ditfers from A. cxca in several 

 other points, the constancy of which, however, must remain doubtful 

 till more specimens can be examined. Such are the elongation and 

 broad contact of the occipitals and the lighter color, but the other 

 characters, as demonstrated by the great uniformity In the large series 

 of A. cxca^ are sufficient to distinguish ^1. hakeri. 



