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PACIFIC SCIENCE, VoL VIII, April, 1954 
Fig. 1. Pseudoceros concinnus. a. Entire specimen as cleared whole mount; b, anterior end showing tentacular 
folds and eye arrangement; c, sagittal view of the copulatory apparatuses, anterior end below. 1, Tentacular folds; 
2, tentacular eyes; 3, cerebral eyes; 4, ruffled pharynx; 5, male gonopore; 6, seminal vesicle; 1, sperm duct; 8, 
female gonopore; 9, cement glands; 10, sucker; 11, main intestine; 12, lateral branches of main intestine; 13, 
uteri; 14, male antrum; 15, penis stylet; 16, penis sheath; 17, penis papilla; 18, prostatic vesicle; 19, prostatic 
duct; 20, ejaculatory duct; 21, female antrum; 22, cement pouch; 23, vagina; 24, one of the uteri. 
