Niche overlap and polyspecific associations among sympatric cercopithecids in the campo animal reserve, Southwestern Cameroon Masazumi Mitani OriginalPaper Pages: 137 - 151
Loud calls ofGalago crassicaudatus andG. garnettii and their relation to habitat structure J. C. Masters OriginalPaper Pages: 153 - 167
Auditory assessment of avian predator threat in semi-captive ringtailed lemurs (Lemur catta) Joseph M. MacedoniaPamela L. Yount OriginalPaper Pages: 169 - 182
Social relationships and individual contribution to cooperative behaviour in captive common marmosets (Callithrix jacchus) A. KoenigH. Rothe OriginalPaper Pages: 183 - 195
Early mother-infant relationships ofMacaca thibetana at Mt. Emei China Ziyun DengQikun Zhao OriginalPaper Pages: 197 - 205
Measurement of deviant behavior in a gombe chimpanzee: Relation to later behavior Peter BuirskiRobert Plutchik OriginalPaper Pages: 207 - 211
The process of weaning in hanuman langursPresbytis entellus entellus L. S. RajpurohitS. M. Mohnot OriginalPaper Pages: 213 - 218
A comparative study of positional behavior in three species of tamarin monkeys Paul A. Garber OriginalPaper Pages: 219 - 230
Homosexual behaviour in wild white-handed gibbons (Hylobates lar) Anna-Marie A. R. EdwardsJohn D. Todd Short Communication Pages: 231 - 236
Insectivory in free-ranging bearded saki (Chiropotes satanas chiropotes) Edson da R. Frazäo Short Communication Pages: 243 - 245
Ant eating by eastern lowland gorillas Juichi YamagiwaNdunda MwanzaTamaki Maruhashi Short Communication Pages: 247 - 253
Social context and reaction to separation in peer-reared pigtail macaques: Some preliminary observations Maria L. BocciaMartin L. ReiteMark L. Laudenslager Short Communication Pages: 255 - 263
Initial calcification of the upper permanent incisor in Japanese macaques Mitsuru AimiShunji GotohYasuo Nogami Short Communication Pages: 265 - 268
Distribution and morphological characters of intermediate forms between the black lemur (Eulemur macaco macaco) and the Sclater's lemur (E. m. flavifrons) C. RabarivolaD. MeyersY. Rumpler Short Communication Pages: 269 - 273
A preliminary note on the intestinal parasites of wild chimpanzees in the Mahale Mountains, Tanzania Masato KawabataToshisada Nishida Short Communication Pages: 275 - 278
A new southern limit for the distribution ofAlouatta caraya in Rio Grande do Sul State, Brazil Júlio César Bicca-Marques Erratum Pages: 281 - 281
