402 



BULLETIN OF THE BUREAU OF FISHERIES. 

 Spheroides maculatus, Pufft r. 



NEMATODES. 



1. Ascaris, 'immature. 



Type with diverticula on (esophagus and intestine. 



L902. — July 7, 2, the larger 12 nun. in Length, with characteristic jaws of Ascaris; post-anal region 

 of smaller specimen rather more slender than the other; diverticulum of (esophagus with a series of 

 punctate dots along its axis. Aug. 11, few. In this lot the jaws were sufficiently developed to show 

 apparent identity of the species with A. habena. The diverticula of (esophagus and intestine also 

 agree with that species. 



CESTODES. 



2. Tetrarhynchus bisulcatus Linton. 



1902. — Aug. 11, 1 scolex from viscera. 



TREMATODES. 



:;. THstomvm vibex Linton. [Fig. 188.] 



1901. — July 31, 1. Aug. 1, 1; color blood red. The flattened specimen measured 6 mm. in length 

 and :'. mm. in greatest breadth. A reexamination of sections of specimens of this species showed the 

 presence of diverticula of the intestines prolonged anteriorly parallel to the pharynx, as shown in 

 sketch of this specimen. 



1902. — Aug. 11, 2 large, 14 small; reddish-brown, diverticula of intestines noted in flattened speci- 

 men. Aug. 15, 1. 



4. Distomum sp. [Fig. 165.] 



This distome is the same as that described in my Trematode Parasites of Fish, Proceedings 1". S. 

 National Museum, vol. xx, pp. 537-538, pi. Lin, figs. 1, 2. Same as No. 4 under Siphostoma fuscum, 

 and No. 13 under Cynoscton regalis: 



Squarish-oblong, thick, white. Dimensions in millimeters of living specimen, slightly com pressed: 

 Length 1.27; breadth through anterior sucker 0.3, through ventral sucker 0.4, maximum breadth 0.61, 

 near posterior end 0.45; transverse diameter of oral sucker 0.16, of pharynx 0.13, of ventral sucker 

 0.16; ova 0.07 by 0.05. 



1902 - Aug. 15, ::. Aug. 20. 12. Aug. 23, 8. 



5. Gasterostomum gracilescens Rudolphi. 



1901. — Aug. 1, 1. This is identical with the species from the gar [Tylosurus marinus) collected on 

 the same date. It is of course possible that this specimen came from that lot. Since, however, great, 



care has 1 u exercised to prevent the mingling of material from specifically different hosts, I do not 



think it is likely to have chanced on this occasion. 



