NO. 2244. WEST INDIAN MAMMALS AND REPTILES— MILLER. 509 



of determination, because material from St. Thomas in the British 

 Museum was afterward identified by Alston ^ as Dasyprocta cristata. 

 Mr. Oldfield Thomas writes me under date of March 6, 1917, that he 

 has examined the specimens mentioned by Alston and that they are 

 obviously referable to some member of the cristata group. There is 

 now little doubt that introductions of agoutis have been made from 

 both Brazil and the Lesser Antilles, That the genus Dasyprocta 

 was probably not represented in the Virgin Islands during pre- 

 Columbian times is indicated by the absence from the kitchen mid- 

 dens of bones referable to any of its species. 



Measurements of No. 217950: Head and body, 540; tail, 15; hind 

 foot, 125 (110) ; ear from meatus, 40; ear from crown, 25; condylo- 

 basal length of skull, 101.2 ; palatal length, 54.6 ; zygomatic breadth, 

 59; least interorbital breadth, 32; mastoid breadth, 34.4; occipital 

 depth, 27; least depth of rostrum behind incisors, 24; frontal depth 

 at level of anterior zygomatic root, 29.4 ; mandible, 64.5 ; mandibular 

 toothrow (alveoli), 29. 



TRICHECHUS MANATUS Linnaeus. 



The atlas and axis of one individual, and three fragments of ribs 

 probably not from the same animal as the vertebrae, were dug from 

 the midden on St. Croix. 



REPTILES. 

 CYCLURA MATTEA, new species. 



Typc—L^it humerus (Cat. No. 59358, U.S.N.M.). Collected in 

 kitchen midden at Magen's Bay, St. Thomas, Virgin Islands, by 

 Theodoor de Booy. Presented by George G. Hej'^e. 



Characters.— ^wmQvws resembling that of Cyclura cornuta from 

 Santo Domingo and C. stejnegeri from Mona Island in general form, 

 but with extremities broader in proportion to total length of the 

 bone, and capitellum broader in proportion to its height. The radial 

 fossa is deeper and better defined than in C. stejnegeri. Pelvis much 

 more robust than in C. cornuta (that of C. stejnegeri not seen). 



Measurements. — Humerus (type and Cat. No. 59359, U.S.N.M.) : 

 total length 80.3 (76.4) ; greatest width of proximal extremity, — 

 (30.7) ; greatest width of distal extremity, 29.5 ( — ) ; least width of 

 shaft, 7. ,7.5) ; capitellum, 13.1 by 8.1 (12.3 by 8.0). Pelvis (No. 

 59734) ; ilium 6 mm. in front of acetabulum, 14.4 by 7 (10.4 by 5.2) 2; 

 ischium at level of small foramen, 13.8 by 5.6 (10.6 by 4.2) pubis at 

 narrowest region, 11.0 by 5.9 (7.3 by 4.0) ; acetabulum 21.8 by 18.0 

 (16.2 by 14.0). 



1 Proc. Zool. Soc. London, 1876, p. 348. 



2 Measurements in parentheses are those of a fully adult C. cornuta (No. 28625). 



