404 PROFESSOR PETERS ON THE GENUS PECTINATOR. 
The pelvic bones are in shape intermediate between those of Chinchilla and Habro- 
coma, therefore very different from those of Dipus. The femur resembles rather that of 
Habrocoma than that of Chinchilla, but has its outer crest much more developed, as in 
Ellobius and Lemmus. The tibia, although much shorter, is similar to that of Chin- 
chilla, but has its sharp crests much more developed, as in Ellobius and Lemmus. The 
thin bony plate which forms the fibula, is more like that of Habrocoma. The seven 
tarsal bones and the metatarsals do not offer any remarkable peculiarity of form. All 
the phalanges of the toes are well developed, except those of the first toe, which has 
only a single, very small basal phalanx. 
millims millims. 
TotalMlenetacotiskull s, csex svela lores casieresn.s,c/0 46 Length of lower molar series ........ 9-1 
From anterior end of the premaxilla to the Length of the spinal column.......... 187 
foramen mis eN WM ayers steve elePelaiata ea) sYar~yatay= 40°5 Length of the cervical portion ........ 19-5 
From anterior end of the premaxilla to the Length of the thoracic portion ........ 385 
foraMenPNCISwVUM | scsfe 8. a tale: zis’ eh stor ehersie 58 Length of the lumbar portion ........ 41 
Tangthiol masalsie qr ietiniceeieiine crvetas 18°8 Length of the sacral portion .......... 17 
Length of the foramina incisiva.......... Tf Length of the caudal portion ........ 74 
From posterior margin of the foramina in- Length of scapula, so. sccecn ee cece 23 
cisiva to the posterior margin of the palate 8:3 Breadth of'scapula).*. 52.34 pees os 10 
Width between the orbits .............. 12 Length of base of the spine of the sca- 
Breadth. of palate My. esc sine et sayeteedeter< s 2-7 pula. oee..as eile see hea ee 16 
Length of interparietal -............... 8:3 Length of humerus... 0%): ss «s0 ss 29 
Breadth of interparietal ................ 14:5 ene thiol. rading! 0s acu: ere pee ieraes 225 
Extreme width of zygomatic arches ...... 26:5 Hergth of dna (3. fess andes wena 28:5 
Length of upper molar series ............ 9-1 
Metacarpal. 1st. phal. 2nd phal. 3rd phal. 
millims. millims. millims. millims. millims, 
Length of first finger .......... 1 1 Nn be 
Length of second finger ........ 6:3 5:2 37 2:3 
Length of third finger.......... 8 5 35 2:3 
Length of fourth finger ........ ii 5 34 2:2 
Length of fifth finger .......... 55 45 3:2 2-1 ne 
Length of:pelvis 262. .250 20. os 87°5 
Length of pubic symphysis ...... 65 
enpthvottemor oo sci ous aria 34 
Theme tat Giiil DIBp ratte ata tYocaretetals 36:5 
Lenpth of fibula”... .....0....- 36 
Length of tarsus ...........-.. 105 
Length of caleaneum .......... xs. Roan 8:5 
Lengthof first toe ....5...¢...- 4 11 Eons ns 
Length of second toe .......... 12-4 7:2 arg 25 
Length of third foe ............ 136 74 5 2°8 
Length of fourth toe .......... 14:5 72 47 2:8 
Length of fifth toe ............ 12-2 6:3 4-4 2-5 
