![Fresh-water biology. Freshwater biology. —CO Fig. 863. Mule oi Rhinops nlrea, Hudson, showing presence of the ahmentary canal, co, cop- uiatory organ; mx, mastax; 0, esophagus; sp, spermarium; St, stomach. X Fresh-water biology. Freshwater biology. —CO Fig. 863. Mule oi Rhinops nlrea, Hudson, showing presence of the ahmentary canal, co, cop- uiatory organ; mx, mastax; 0, esophagus; sp, spermarium; St, stomach. X](https://c8.alamy.com/comp/PFYJ8J/fresh-water-biology-freshwater-biology-co-fig-863-mule-oi-rhinops-nlrea-hudson-showing-presence-of-the-ahmentary-canal-co-cop-uiatory-organ-mx-mastax-0-esophagus-sp-spermarium-st-stomach-x-400-after-rousselet-fig-86-male-of-copeus-packyurus-gosse-showing-absence-of-alimentary-canal-br-brain-c7-copulatory-organ-5-sperma-rium-x-260-after-dixon-nuttall-account-of-the-other-rotifers-they-will-be-grouped-about-the-no-tommatidae-in-the-way-which-appears-to-be-called-for-by-the-facts-this-follows-mainly-wesenberg-lund-1899-who-has-developed-a-class-PFYJ8J.jpg)
Fresh-water biology. Freshwater biology. —CO Fig. 863. Mule oi Rhinops nlrea, Hudson, showing presence of the ahmentary canal, co, cop- uiatory organ; mx, mastax; 0, esophagus; sp, spermarium; St, stomach. X
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