Spermatogenesis of Succinea ovalis, Say


AN investigation of the Spermatogenesis of Succinea ovalis, Say., a small terrestrial pulmonate of North America, has revealed the following: 1. Forty chromosomes are found in the spermatogonial divisions, and twenty in the maturation divisions. 2. Typically of all pulmonates so far studied, there are two centrioles, proximal and distal. Early in spermogenesis the proximal centriole penetrates through the nucleus of the spermatid, and with the surrounding intranuclear canal, forms an intranuclear rod in very much the same way as has been reported for certain prosobranchs. 3. Both the head and tail of the spermatozoon have a spiral twist. These spirals go in either a clock-wise or counter clock-wise direction, one type being about as common as the other.

Access options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

HICKMAN, C. Spermatogenesis of Succinea ovalis, Say. Nature 115, 86 (1925) doi:10.1038/115086b0

Download citation


By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.