414 



BULLETIN OF THE BUREAU OK FISHERIES. 



1902. — Aug. 28, 15. Aug. 30, few. In these lots > >■ » 1 1 i spilled and spineless forms occurred. There 

 was also great diversity of form, long ami short oval, pyriform, flask-shape, etc. July 15, few. July 

 30, t. Aug. 11, 1l'. Aug. 14, 1. Aug. 16, 5. Aug. 19, 6. Aug. 20, 10. Small and mature speci- 

 mens together; some slender anil almost spineless. 



19. Distomum valde-dnflalum Stossich. 



1901. — Aug. 21, 1, from cyst. This specimen appears to agree with forms which I have been 

 referring to this species. It agrees so well with I), denlaturn, however, in the same host, that there is 

 some reason to regard it as the immature form of that species. Dimensions, in millimeters, of specimen 

 liberated from its cyst: Length (U>2; diameter 0.5; diameter of oral sucker 0.11, of ventral sucker 0. Hi; 

 pharynx, length 0.05, breadth 0.06; length of oral spines 0.04. 



I '.mil'. ■— July Hi, several, encysted on the liver and associated with much pigment; spines on body 

 and around mouth, but still very small, the largest of the latter measuring only (1.014 mm. in length, 

 in two rows and shaped like those of No. 18. Another encysted distome is evidently the same as 

 thai which I have been recording under the name I), valde-inftatum. Dimensions, life, in millimeters, 

 compressed: Length 1.12; diameter, anterior 0. 15, at ventral sucker 0.45, near posterior end, maximum, 

 0.6; diameter of oral sucker 0.12, of pharynx 0.18, of ventral sucker 0.24; length of oral spines 0.04. 



20. Dislomum sp. 



ItMll. — Aug. L'S, 1, a filiform specimen, a fragment. Dimensions in millimeters: Length 4; diameter 

 i . e. impressed ) O.lli, uniform throughout; ova 0.(IL'4 and 0.017 in the two principal diameters, found 

 throughout tin' greater part of the length of the fragment. 



1902. — Aug. 18, 1, a fragment; anterior end of a single specimen. Distance to posterior edge of 

 ventral sucker 1.5; diameter of oral sucker 0.25, of pharynx 0.16, of ventral sucker 0.36. 



21. Gasterostomum gracilescens Rudolphi. [Fig. 237.] 



1902. — July 22, 2, oval, armed with minute spines. Dimensions, life, in millimeters: Length 1.27; 

 breadth 0.6; diameter of anterior sucker 0.2, of mouth 0.08; ova 0.02 by 0.011. 

 See under Menidia, Tylosurus marinus, etc. 



Lophopsetta maculata, Sand-shoal Flounder. 



ACAXTIIOCEI'HALA. 



1. Echinorhynchus prisiis Rudolphi. 



1902. July 23, 1, male. 



NEMATODES. 



2. Ascaris sp. Immature. 



1901. — July 22, from viscera. These belong to the type with a diverticulum from both oesophagus 

 and intestine. Rudiments of the jaws of an Ascark were made out in a specimen from which the 

 embryonic cuticle was sloughing off. Aug. 8, numerous, from viscera. There were numerous clustered 

 cysts on the mesentery which appear to have been due to nematodes, although no worms were found 

 in them. 



1H02.— July 15, 1. Aug. 1 and 25, few. 



:;. Heterakis sp. 



1902. — Aug. 1, 1, a female, and fragment; length 4.2 mm. This is similar to A^airis (.') sp. 

 (Bulletin U. S. Fish Commission for 1899, page 481, pi. vn, ligs. 57-61, and probably Oucuttanus sp., 

 page 441, pi. wii, tigs. 2(17, 20S. ) 



See introduction for remarks on HeteraMs. 



