21. Some species ( excluding " Planctoteuthis " ) are olfactory papillae . 22. The female vent is not so large and often smoother without papillae folds. 23. Males have eight caudal papillae encompassing the anus on their bluntly rounded ends. 24. A gene altering the density of fungiform papillae may provide this second factor. 25. In addition, the tongue is long, extendable and covered in papillae . 26. The eyes are located at the base of the antenna on flat papillae . 27. The glossopharyngeal nerve innervates a third of the tongue including the circumvallate papillae . 28. The 20 gills are situated around the anal papillae and are somewhat shorter. 29. Diagnosis : The teleoconch is with conspicuous sutural papillae . 30. There are no tentacles or papillae over the eyes.
