4 PROCEEDINGS OF THE NATIONAL MUSEUM vol.68 



form two posteriorly directed uteri. Anus 300/i before the posterior 

 extremity, which is conical with a terminal spike lOju long. Eggs 

 oval, 68ju by 45//, with thin shells. 



Habitat. — In Megaloiiterus hawaiiensis, organ not stated, May 17, 

 1923, Alex. Wctmorc. 



Locality. — Hawaii, Lisianski Island. 



Type.—U. S. N. M. Helminthological Collections No. 26204; para- 

 types No. 25454, and in the collections of the Bishop Museum. 



In comparing the two species described above, the dissimilarity in 

 the distribution of the caudal papillae of the males is at once evi- 

 dent. So far as the writer is aware, the arrangement as seen in C. 

 magnipapillatum is entirely different from any other species, while 

 that of C. turgidum is quite typical. Material representing five 

 species, including the above, has been examined and reference has 

 been made to the remainder of the described species. The eggs of 

 these two species are also conspicuously different in the character 

 of the shell. It may be that when other species of Contracaecum 

 have been recovered from other species of terns, a new genus, or at 

 least a subgenus, will be indicated. 



CESTODA 

 Family BOTHRIOCEPHALIDAE 



BOTHHIOCEPHALUS, species 



Two specimens of a species of Bothriocephalus close to and possibly 

 identical with B. Mans (Diesing) were collected from Monaclius 

 schauinslandii April 8, 1923, by Doctor Wetmore. The author does 

 not feel that differentiation of the species in this genus should be 

 undertaken without the expenditure of considerable time for study 

 and without the examination of a moderately complete collection of 

 authentic material. As neither time nor material is at present avail- 

 able, the specimens (U. S. N. M., Helm. Coll. No. 26205) are left 

 with generic identification only. 



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