.'U')4 BULLETIN OF THE Itl'KKAl' OF FISHERIES. 



M'.M IT CS. 



I. Ascaris incurva Rudolphi. 



Four adult females ami 2 smaller, which appear to It young; slender, fusiform; length I»;-l'ii 

 mm. Ova, s e nearly spherical, about 0.05 nun. in diameter; others short oval 0.06 by 0.04. 



Si i far as these specimens have been examined they agree with this species, although much smaller 

 than specimens From the sword-fish. 



TREMATODES. 



■J. Distomum monlicellii Linton. 



I'Vw , small, immature. 

 :;. fristomutn Mspidum Abilgaard. 



I'lfi \ ; w iih oral spines and stunt spines on the neck. There is considerable variet \ of shape and 

 lize mi ihi: lot, but so far as studied they appear to belong to (he same species. 

 I. Duttomumap. [Figs. 206,' 207.] 



( me, length •"> mm., breadth 0.5 mm. 'Phis specimen was al first a very puzzling one. • in account 

 of ihe apparent segmentation of the posterior part it was recorded in the notes made at the time of 

 collecting as the fragment of a cestode. The posterior end is apparently four-jointed, the anterior end 

 is much crumpled anil folded together. The s] imen had been killed with formalin before it was 



examined. When stained and sectioned it is seen to he not a eesto.le but a distonie. The close 



approach to segmentation of the body is evident also in the sections. The general arrangement of the 

 reproductive organs is shown in the diagrammatic sketch. The vitellaria are abundant, posterior and 

 peripheral, extending as far forward as the seminal vesicle; testes t «... on median line, following each 



other much as in D. tenue. The Ovary is situated a short distance in front of the anterior testis. 1 

 was able to find only one intestine in the sections. It is persistent to the posterior end. The ova. 



which are numerous, are massed between the ovary and the seminal vesicle, 1.06 by 0.03 nun., in the 

 two principal diameters. Very little can be made out of the section ot the crumpled anterior part 



more than the presence of at least one sucker. 



5. Oaslerosiomum, gorgon sp. nov. [Figs. 240-242.] 



Sketches and description based on specimens which had been killed in formalin. 

 Small, rather plump and somewhat fusiform worms, differing from other species of this genus 

 incut ioi icd in these notes by having a cylindrical neck and the anterior sucker surrounded by a crown 



of about eighteen tentacles. In most cases the anterior end was inverted, when the worms have 



the general appearance of such gasterostoma as those found in the gar and other fish. The appendages 



are not I ks, although somewhat rigid, and they doubtless function as a kind of grappling organ to 



enable the worm to maintain a lodgment in its host. There is a dense covering of minute spines on 



the body. These spines are very short. Hat, and rounded when seen mi the Hat surface, although 



appearing slender when seen in profile. 



The following points in the anatomy were made Out: The characteristic cirrus pouch of Ihe gen US 

 lay at the posterior end. and equaled nearly one-third the length of the body; the small, globular 

 ovary was situated at its anterior end. The two testes lay on the dorsal side of the anterior third of 



ihe cirrus pouch, diagonal and close together. The intestine was ellipsoidal, elongate in a ventro- 

 lateral view and immediately in front of the ovary. The globular vitellaria are dorsal ami anterior to 

 the intestine. The number was not definitely made out. Twenty-five were counted in lateral view. 



The position assumed by the worms in formalin is arcuate, as shown in Ihe sketches. In tin' 

 inverted specimens the anterior end is more or less truncate in outline. The ova, which occupy the 

 greater pari of the interior of the body, are yellow and conical. 



Dimensions of one in formalin: Length 1.65 mm; diameter of body 0.36 mm.; of neck 0.21 nun.: 

 of circle of tentacles 0.36 mm.; ova 0.022 by 0.01 t i. 



6. Oasterostomum sp. 



Few. These are very small and are a different species from No. 5, The anterior sucker is rela- 

 tively smaller, and there are no tentacular processes; ova elliptical. 



COPEPOD I' IE \sl I ES 



7. < '<>/>, p<>il pantsites. 



Two; from gills. 



