258 BULLETIN 180, UNITED STATES NATIONAL MUSEUM 



Table 29. — Counts and measurements of the two species of Phtheirichthys ' 



Character 



P. muUiradiatus 



Off reef of 

 Canton 

 Island 



U.S.N.M. 

 No. 115736 



Pacific 

 Ocean 



U.S.N.M 

 No. 117804 



P. Unealus 



Pacific 

 Ocean 



U.S.N.M. 

 No. 7031 



Woods 

 Hole, 



Mass. 



U.S.N.M. 

 No. 20331 



Latitude 

 75°47' N., 

 longitude 

 9°5' W 



U.S.N.M. 

 No. 92305 



Near Isle of Wight, 

 England 



U.S.N.M. 

 No. 86582 



U.S.N.M. 

 No. 86582 



Standard length 



Total length 



Head 



Snout -. 



Eye 



Postorbital length of head 



Depth of body 



Least depth of caudal peduncle 



Length of caudal peduncle 



Snout to soft dorsal 



Snout to anal. _ 



Snout to pelvic base 



Interorbital space 



Rear of disk to dorsal 



Length of disk 



Greatest width of disk 



Eye to tip of lower jaw 



Length of upper jaw_. 



Length of lower jaw 



Length of longest caudal ray. . . 

 Length of longest pectoral ray.. 



Length of longest pelvic ray 



Dorsal rays.. 



Anal rays 



Pectoral rays. . _ 



Gill rakers 



Laminae in disk 



58.0 



68.4 



20.2 



8.5 



5.2 



7.9 



7.8 



2.9 



7.8 



54.2 



53.0 



21.6 



9.0 



30.7 



20.4 



10.4 



10.4 



7.2 



9.3 



15.7 



12.1 



11.8 



38 



38 



20 



1+1+10 



10 



113 



135. 7 



19.7 



8.8 



4.9 



8.0 



8.8 



3.1 



8.2 



55.6 



53.7 



20.8 



10.1 



30.5 



23.4 



12.0 



9.7 



7.4 



8.0 



18.9 



12.4 



13.3 



36 



37 



20 



1+1+15 



10 



140.5 



167 

 17.8 

 7.7 

 5.3 



3.0 

 9.5 

 56.2 

 54,6 

 19.6 

 10.3 

 34.5 

 21.0 

 11.0 

 9.2 

 6.4 

 7.3 

 16.4 

 11.9 

 12.0 

 31 

 31 

 19 

 3+1+13 



10 



134 



162 



18.4 



7.7 



4.6 



7.5 



9.1 



3.6 



8.6 



54.2 



52.7 



18.5 



10.1 



35.2 



20.4 



10.5 



9.2 



6.2 



7.2 



19.4 



11.8 



12.2 



31 



30 



19 



3+1 + 14 



10 



53 



68 



20.9 



9.4 



5.6 



8.3 



8.3 



3.2 



7.9 



57.4 



54.6 



21.2 



10.0 



33.0 



22.6 



11.3 



10.6 



7.7 



9.6 



26.0 



13.6 



13.4 



31 



32 



IS 



?+l + 13 



60.3 



60.0 



33 

 33 

 19 

 2 or 3+1 

 + 13 

 10 



2 or 3+1 

 +13 



10 



' All measurements are expressed in hundredths of the standard length. 



Table 30. — Counts made on Phtheirichthys * 



' Counts were made on two specimens in the collection of the Academy of Natural Sciences of Philadelphia 

 and eight from the Museum of Comparative Zoology through the courtesy of H. W. Fowler and W. C. 

 Schroedcr, respectively. The specimens are from the following localities, respectively: Atlantic, north of 

 Tropics; Pacific Ocean; Singapore; Cuba; Habana, Cuba; Habana, Cul)a; Atlantic Ocean; Tahiti; Hong 

 Kong; and Hong Kong. Other specimens in the National Museum. 



