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PROCEEDINGS OF THE NATIONAL, MUSEUM 



VOL. 88 



Length, in formalin, 0.9 mm.; breadth, 0.42 mm.; diameter of oral 

 sucker, 0.14 mm., ventral sucker, 0.28 mm.; ova, 0.020 by 0.013 mm. 

 The ova in balsam are thin-shelled and difficult to measure, about 

 0.015 by 0.009 mm. 



Seven (U.S.N.M. No. 8360), collected September 5, 1913. Meas- 

 urements in formalin from length 0.91 mm. and breadth 0.44 mm. to 

 length 1.75 and breadth 0.63 mm.; ova in balsam, about 0.015 by 

 0.009 mm. 



The lobes of the ovary seemed to be at least as long as broad ; lobes 

 of vitellaria about as loner as broad. 



Table 32. — Measurements of six specimens of Lecithaster confusus in halsam 



Measurement 



Length 



Breadth 



Oral sucker, length 



Oral sucker, breadth 



Pharynx, length 



Pharynx, breadth 



Ventral sucker, length,. 

 Ventral sucker, breadth 

 Ova, 0.015 by 0.009 mm. 



Mm. 

 1.54 

 .65 

 .14 

 .13 

 .03 

 .07 

 .25 

 .22 



• No. 1, ventral view, others lateral view. 



From dollarfish: One, collected July 20, 1919, from a 12-mm. fish. 

 Measurements in balsam : Length, 0.7 mm. ; breadth at level of ventral 

 sucker, 0.28 mm., behind ventral sucker, 0.22 mm.; diameter oral 

 sucker, 0.06 mm., pharynx, 0.04 mm., ventral sucker, 0.15 mm.; ova, 

 0.012 by 0.007 mm. 



From common mackerel: Eight (U.S.N.M. No. 8361), collected 

 August 23, 1919, from a 16-mm. fish and ten from a 22-mm. fish. 

 Measurements, life: Length, 0.52 mm.; breadth, 0.25 mm.; diameter 

 oral sucker, 0.06 mm., pharynx, 0.04 mm., ventral sucker, 0.16 mm. ; 

 ova, 0.015 by 0.009 mm. 



One, collected August 28, 1919, from an 11-mm. fish ; length, 0.33 mm. 



Three from a 10-mm. fish. Measurements of one, life: Length, 

 0.45 mm. ; breadth, 0.18 mm. ; diameter oral sucker, 0.06 mm., ventral 

 sucker, 0,11 mm.; ova, 0.015 by 0.009 mm. Lobes of vitellaria 

 slightly pyriform. 



From puffer : Four, collected July 7, 1919, from a 10-mm. fish, two 

 from each of two 9-mm. fish, and two from a 7-mm. fish. Measure- 

 ments, life: Length, 0.98 mm., breadth, 0.40 mm.; diameter oral 

 sucker, 0.98 mm., pharynx, 0.05 mm., ventral sucker, 0.18 mm.; ova 

 0.015 by 0.010 mm. 



