106 PROCEEDIN(;S OF THE NATIONAL MUSEUM. vol. xxxm. 



DISTOMUM SUBTENUE, new species. 

 Plate IX, fig. 65. 



Type.— OAt. No. 57^9, U.8.N.M. 



While none of the distomes referred to this species showed as much 

 of the anatomy as could be desired, they were easily recognized in the 

 several hosts by the large cirrus and the elongated ova. 



An attempt was made to refer them to some genus in Pratt's 

 Synopsis, l)ut without success. 



Bod}^ subcylindrical; ventral sucker larger than oral and promi- 

 nent; testes two, globular, close together in a medio-dorsal position, 

 and immediately preceded by the ovary; uterus extending back of the 

 testes to the posterior end of the ))ody; cirrus robust; genital pore a 

 short distance in front of the ventral sucker and a little to the left of 

 the median line; vitellaria confined to a few isolated patches in the 

 median region of the body near the testes; uterus passing to the left 

 of the cirrus; ova somewhat elongated; intestinal cseca not clearly 

 made out, but apparently extending to the posterior end of the body. 

 The ova are crowded at the posterior end of the body behind the 

 testes, whence they extend ventrally to a point a little in front oi the 

 ovary. The longer diameter of the ova is more than twice the shorter. 

 In a ventral view the apertures of the suckers are seen to be trans- 

 verse. Dimensions, in millimeters, life: Length 3.60; diameter of 

 body 0.63, of oral sucker 0.39, of ventral sucker 0.68; ova 0.05 by 

 0.02. Dimensions of specimen in balsam: Length 2.07; breadth 0.52; 

 oral sucker, length 0.25, breadth 0.30; pharynx, short-fusiform, 

 length 0.15. breadth 0.15; ventral sucker, length 0.30, breadth 0.48; 

 ova, collapsed and crowded, not easily measured, 0.042 by 0.015. 



This species was found in four Bernmda fishes. 

 Calarii us cahnn ns. 



August 3, six; August 7, five. 



liarpe rafa. 



August 7, two. These distomes arc smaller than those from Cala- 

 mus, but they agree with them in essential particulars; length 1.02 mm. . 

 in balsam. 

 Iridio hivittntHs. 



July 9, two, immature. These were cylindrical, slightly arcuate 

 with prominent ventral sucker. Dimensions, in millimeters, life: 

 Length 0.6; diameter anterior 0.06, posterior 0.07, at ventral sucker 

 0.18. 

 LachnolairiiKS viaxhtuis. 



July 18, one, length 1.28 mm. 



