STUDIES ON THE BRACKISH WATER CERCARIAE IN JAPAN

II. TWO NEW LONG-TAILED CERCARIAE, CERCARIA KOMIYAI N. SP. AND CERCARIA NIGROCAUDATA N. SP. IN TOKYO BAY (TREMATODA)

Abstract

During the course of my investigation at Urayasu, two new species of peculiar long-tailed cercariae were encountered. One species was obtained from a brackish water snail, Tympanotonus microptera, and I proposed a new name, Cercaria komiyai n. sp. which was designed to dedicate to Dr. Yoshitaka Komiya, to whom I was much indebted for his generous encouragement. The other species emerging from a brackish water snail, Cerithidea largillierti was also long-tailed one but distinctly differed from the former species. While the only meagre observation could be made on the latter species, I tried to make a preliminary description with a new name, Cercaria nigrocaudata n. sp. The detailed description of the latter species will be performed in the future.
Materials and methods were briefly noted in this paper since they were given in details in the former paper of this series. The living larvae were mainly studied for details of the excretory system and the number of penetration glands. For these measurements they were killed with 10% hot formalin. All drawings were made to scale from such measurements.