TREMATODES FROM FISHES — LINTON 



143 



Genus LECITHOCLADIUM Luhe, 1901 



LECITHOCLADIUM GULOSUM (Linton) 



Plate 8, Figubes 79-82 



Distomum gulosum Linton, Bull. U. S. Fish Comm. for 1899, p. 454, figs. 315- 



317, 1901.— NicoLL, Ann. Mag. Nat. Hist, ser. 7, vol. 19, p. 69, 1907. 

 Lecithocladium gulosum (Linton), Looss, Zool. Jahrb., vol. 26, p. 135, 1007. 



One specimen from the chub mackerel was observed to have a dis- 

 tinct hump on the neck, thus resembling L. cristatum (Rudolphi), 

 but this nuchal hump may be due to contraction, since it is absent 

 from others which are mounted in a position to show the neck in 

 lateral view. There is no indication of the incised serrations char- 

 acteristic of L. excisum (Rudolphi). 



Table 34. — Measurements of the seminal vesicle of Lecithocladium gulosum in 

 two series of cross sections and four series of sagittal sections 



Table 35. — Measurements of specimens of Lecithocladium gulosum in balsam 



Measurements 



From 

 Poronotus 

 triacavthus 



From 

 Pneumaio- 

 phoTui grex 



From 

 Scomber 

 scombrug 



Length 



Breadth 



Oral sucker, length 



Oral sucker, breadth 



Pharynx, length 



Pharynx, breadth 



Ventral sucker, length.. 

 Ventral sucker, breadth. 

 Seminal vesicle, length.. 

 Seminal vesicle, breadth 



Mm. 

 8.40 

 1.14 

 .46 

 .42 

 .42 

 .18 

 .40 

 .38 

 .77 

 .25 



Aim. 

 8.82 

 1.16 

 .51 

 .36 

 .38 

 .19 

 .42 

 .36 

 .77 

 .25 



Mm. 

 7.42 

 .94 

 .46 

 .39 

 .45 

 .25 

 .39 

 .39 

 .77 

 .21 



Mm. 

 9.42 

 1.12 

 .56 

 .52 

 .49 

 .22 

 .43 

 .43 

 1.09 

 .31 



Mm. 



6.58 

 .70 

 .42 

 .25 

 .42 

 .17 

 .35 

 .35 

 .56 

 .18 



Mmi 

 6.02 

 .55 

 .45 

 .33 

 .45 

 .17 

 .34 

 .34 

 .53 

 .17 



The ova in all the balsam mounts are crowded and collapsed, about 

 0.018 by 0.009 mm. Average of 10 specimens from P. triacanthus : 

 Length of oral sucker, 0.32 mm.; of pharynx, 0.29 mm.; of ventral 

 sucker, 0.30 mm. Average of 10 from P. grex: Length of oral 

 sucker, 0.28 mm. ; of pharynx, 0.29 mm. ; of ventral sucker, 0.23 mm. 



Hosts. — Dollarfish {Poronotus i(W«<?(2/ii5A^^), chub mackerel {Pneu- 

 matophorus grex), common mackerel {Scorriber scornbrus). 



