NO. 1552. NOTES ON MALAYAN PORCUPINES— LYON. 589 



processes, a more slender and pronounced rostrum, zygomata more 

 convergino- anteriorly, and a heav>' grooved malar of nearh^ uniform 

 width throughout its length, which is subtended l)y a considerable 

 backward extension of the maxillary portion of the zygoma. Molars 

 rooted. 



DeacriptUm of dun. — Size small, somewhat less than that of Athe- 

 j-un/s, tail relatively longer. Upper parts and sides of body covered 

 with spines more flat and less stiff than in AthcinrrKs, grooved both 

 above and below, of about the same length (25 to 30 mm.) all over the 

 back. Interspersed among them are a xevy few stiff bristles, about 

 75 mm. long. The head, underparts, and the legs are covered with 

 softer, shorter bristles. The extreme base of the tail is covered with 

 spines like those on the back. The greatest portion of the tail 

 is covered with well-detined scales, each subtended l)y a single 

 hair. Toward the tip tiie scales grow larger and the ,sul)tending hairs 

 ])ecome longer (about lOo mm.), ffat, hollow^ bristles of uniform width 

 throughout their extent. (Plate LVII, fig. 4.) 



Slxeleton. — The main features of the skull of the genus Tr/c/^y.y have 

 previously been pointed out. The relative size and shape of the skull 

 and of its various parts are clearly shown in fig. 3, Plates LIV, LV, 

 and LVI, so no detailed description is here necessary. The vertebral 

 formula is: Cv. 7, D. Ki, L. 5, S. 3, Cd. 25. The axis bears a large 

 laterally-compressed neural process, strongly curved and bent back- 

 ward. (Plate LVII, fig. 5.) The neural spine of the seventh cervical 

 is short as it is in Thecurus and Atherurus. The lateral processes of 

 the lumbar vertebra> are rather slender, curved, and directed forward, 

 and wdth a somewhat pointed apex. (Plate LVII, fig. 6.) The sacrum 

 is of form similar to that of Athemrus; it contains three vertebra, and 

 to the first of these the ilia are attached. The presternum is relatively 

 short, and with a relatively narrow anterior expansion. The humerus 

 and the bones of the forearm are proportioned as they are in the 

 genus AtJierurus. The femur is relatively more slender in Trichys 

 than in the other genera, and the metatarsals and phalanges are some- 

 what longer than they are in the genus Atherurus. In Tiuchys the 

 scapula is much narrower than in the other genera, and its anterior 

 border is strongly rounded oft'. 



TRICHYS FASCICULATA (Shaw), rt 



1801. Hijstrb-fascicidatd, Shaw, Gen. Zool., II, Ft. 1, Mainin., p. 11, pi. cxxiv. 



Type-locality: Malacca. 

 1830. Alherura fasciculafa , Bennett, Gardens and Menagerie Zoo). Soc. London, 



pp. 175-178. 



« While these notes have been going through the press Mr. Oldfield Thomas (Proc. 

 Biol. Soc. Washington, XX, p. 66, June 12, 1907) has attempted to show that i/ysiria; 

 fancifulnta Shaw, based on Buffon's Pore-epic de Malaca, is a synonym of Hystrix 

 macrotirn Linnf«us. Although IVIr. Thomas is probably right in his conclusion as to 



