[Illustration: FIG. 12. Distribution of _Nyctimene albiventer bougainville_ ([BC]) and _N. albiventer minor_ ([LW]). For names of islands see Fig. 2.] [Illustration: FIG. 13. Scatter diagram comparing two subspecies of _Nyctimene albiventer_. One individual of specimens thought to be intergrades is as large as specimens of _Nyctimene a. bougainville_, whereas the other three intergrades are about the same size as specimens of _N. a. minor_. Symbols represent _N. a. bougainville_ ([BW]), _N. a. minor_ ([TW]), and intergrades assigned to _minor_ ([BC]). For names of islands see Fig. 2.] TABLE 3. Average and Extreme Measurements of _Nyctimene albiventer bougainville_ and _N. a. minor_. ===============+==================+==================+=================== | _N. a. minor_ | _Intergrades_ | _N. a. | | | bougainville_ | | | MEASUREMENT | Choiseul, | Fauro | Kolombangara, | Santa Ysabel | | Guadalcanal | 4 [M], 1 [F] | 1 [M], 3 [F] | 8 [M], 1 [F] ---------------+------------------+------------------+------------------- Length of head | | | and body |107.0 (105 -109 )|109.2 (105 -112 )|110.0 (106 -117) Tail vertebrae | 20.0 (19.3- 20.5)| 21.0 ( 20 - 22 )| 19.2 ( 15.5- 23.0) Hind foot | 14.2 (13.5- 15.0)| | 14.3 ( 13.0- 15.9) Ear | 11.9 (11.0- 13.0)| | 12.8 ( 11.8- 14.5) Length of | | | forearm | 54.8 (54.0- 55.8)| 57.1 (55.9- 59.0)| 57.9 ( 55.8- 59.8) Greatest | | | length of | | | skull | 28.2 (27.2- 28.9)| 28.6 (28.3- 29.7)| 29.7 ( 28.6- 30.1) Condylobasal | | | length | 26.7 (26.2- 27.5)| 27.4 (26.6- 28.0)| 28.0 ( 27.8- 28.9) Palatal length | 11.2 (10.9- 11.9)| 11.6 (11.3- 11.8)| 11.7 ( 11.0- 12.5) Breadth of | | | braincase | 12.0 (11.5- 12.4)| 12.0 (11.7- 12.2)| 12.3 ( 12.1- 12.8) Zygomatic | | | breadth | 18.9 (18.4- 19.7)| 18.6 (18.4- 19.2)| 19.2 ( 18.7- 20.0) Interorbital | | | breadth | 5.0 ( 4.7- 5.6)| 5.3 ( 5.0- 5.6)| 5.1 ( 4.7- 5.5) Breadth across | | | first upper | | | molars | 8.6 ( 8.4- 8.9)| 8.9 ( 8.7- 9.1)| 9.1 ( 8.8- 9.6) Maxillary | | | tooth-row | 8.9 ( 8.7- 9.3)| 9.3 ( 9.1- 9.5)| 9.5 ( 9.2- 9.8)