138 



and a lower group. The linear arrangement of this group is not easy to deter- 

 mine; but four rows would seem to be defined. The upper group, of which 

 the individual hairs are dark in colour, is directed upwards and backwards ; the 

 lower group, of which the individual hairs are pale or white, is directed down- 

 wards and backwards. The same distribution and distinction .in colour applies 

 to the genal set, which consists of about half a dozen bristles arising from a 



Fig. 3. 



Dasycerciis cristicauda. 

 The well-developed ulnar carpal papilla and its vibrissae. 



particularly well-developed papilla. The interramal papilla is very conspicuous 

 and gives origin to a group of three pale vibrissae. (See fig. 2.) 



Brachial vibrissae. — Upon the limbs there is only one papilla developed, and 

 this — the ulnar carpal — is particularly large. Some half a dozen well- 

 differentiated bristles spring from it. (See fig. 3.) 



Fig. 4. 



Dasyccrcus cristicauda. 



Full face view of a small embryo, 25 mm. R.V. length, 



to show the condition of the rhinarium. 



The rhwarinm. — The short muzzle shows a rather distinct ridge which runs 

 over the dorsum of the snout region behind the rhinarium. the ridge being 

 expressed by a slight swelling which tends to be limited behind by a slight furrow. 

 The ndge and the furrow are expressions of the abbreviation'of the maxillary 

 portion of the muzzle which is a conspicuous feature of the young animal. The 

 naked rhinarium is somewhat square in outline, it is grooved in the middle line, 

 and the anterior nares are cleft laterally. The rhinarium narrows but little as it 

 passes to the upper lip, to which it rjakes a very considerable contribution, 



