108 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxiii. 



behind ventral sucker; vitellaria filling the tail portion and extending 

 forward on the left side as far as the testes. 



Dimensions, in millimeters, life: Length 1.85; length of tail 0.98; 

 diameter of anterior portion 0.45, of tail 0.18; diameter of oral sucker 

 0.25, of ventral sucker 0.09. Dimensions of specimen in balsam: 

 Length 0.98; anterior portion, length 0.88, diameter 0,21; posterior 

 portion, length 0.00, diameter at middle 0.08; diameter of oral sucker 

 0.12, of ventral siicker 0.01. 



Average of three specimens, in life: Length 0.95; diameter of oral 

 sucker 0.103, ventral sucker 0.04. 



In Pratt's Synopsis this distome appears to be near the genus Euine- 

 gacetes Looss, but in reality is a very different form from that. 



These distomes were found in two of the Bermuda fishes. 

 Lactophrys trlyo'iius. 



August 3, eight, maxinnun length 0.95 nun. 

 Lactophrys tricornix. 



August 1, two, maxinnun length 1.S5 nun. 



DISTOMUM LAMELLIFORME, new species. 

 Plate X, fig. 75; plate XI, figs. 76-78. 



Ti/pe.—C^i. No. 5801, U.S.N.M. 



Body orbicular, flat and leaf-like, smooth, often broader than long. 

 Ventral sucker larger than oral, sessile, with circular aperture, rela- 

 tive proportions of suckers somewhat varial)le, but in alcoholic speci- 

 mens ventral sucker not twice the diameter of the oral. The average 

 of four was: Oral sucker 0.075 mm., ventral sucker O.lO mm. 



Mouth subterminal, pharynx near oral sucker, globular; esophagus 

 short; intestinal crura simple extending to near the posterior end of 

 the body. 



Testes two, round, or, under pressure, with undulate outline, situ- 

 ated behind ventral sucker on opposite sides of the median line and 

 separated from each other by a space approximately equal to the 

 diameter of the testis. Seminal vesicle to the right of the ventral 

 sucker preceded bj'^ the prostate gland and both inclosed in the cirrus 

 pouch. Cirrus relatively large. Vitelline glands abundant, distrib- 

 uted throughout the posterior and lateral regions of the body as far 

 forward as the pharynx. Ovary behind the ventral sucker and between 

 the testes obsciu-ely lobed. Uterus along median line between testes 

 and passing to left of ventral sucker, in some cases a little in front, 

 in others at same level, and in 3"et others a little behind that organ. 



Ova relatively few and large. 



Dimensions, in millimeters, life, specimen flattened under cover 

 glass: Length 0.82, breadth 1.20; oral sucker, length 0.06, breadth 

 0,07; ventral sucker, length 0.15, breadth 0.21; ova 0.075 by 0.036. 

 Another, length 0.72, breadth 0.65; another, length 1.10, breadth 1.20. 



