Pandorina morum, [111], [129]

Pansporoblast of Myxosporidiaceae, [107]

Pantostomata, [109]

Papula (including dermal gill), [432], [457];

compared to diplopore of Cystoidea, [599]

Paractinopoda, [570]

Paragaster, [187]

Paragastric canals, [416]

Paraglycogen (= paramylum), [95]

Paragorgia, [333], [336], [351]