Cytological Studies of Melaniidae with Special Reference to Parthenogenesis and Polyploidy

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Annamalai University, 1959 - Melaniidae - 186 pages
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Contents

Material and Methods
2
Anatomical Introduction
5
Distribution and Taxonomy
7
References
9
Plates I to IV
10
Main Results of the Present Investigation
16
PART I
17
Oogenesis of the Parthenogenetic species of Melanoides 8 Introduction
19
Summary
112
References
113
Plates XLIV to LIII
120
25 Introduction
133
Chromosomes of Paludomus tanschaurica
134
Chromosomes of Melanoides tuberculatus Diploid race
135
30 Chromosomes of Melanoides lineatus
136
31 Chromosomes of Melanoides scabra
137

Section A Early Oogenesis
20
Section B Maturational stages
24
Maturation in Melanoides lineatus
31
Maturation in Melanoides tuberculatus Diploid race
33
Maturation in Melanoides scabra
36
Discussion
39
Summary
43
References
45
PART II
91
Introduction
93
Meiosis in the Rare males of the Polyploid race of Mela noides tuberculatus
94
Discussion
103
33 Summary
141
34 References
142
35 Plates LIV to LX
146
PART IV
154
Introduction
155
37 Sex Chromosome in Melania crenulata
156
Sex Chromosomes in Paludomus tanschaurica
159
39 Discussion
162
Summary
167
Resume
168
References
171
43 Plates LXI to LXIX
178

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