NO. 1123. PEOCEEDINGS OF THE NATIONAL MUSEUM. 795 



bothria 0.56 long and 0.45 broad; longest spines nearly 0,03 in length. 

 Bothria converging in front, strongly divergent beliind. 



G«. Small cysts between subinucons and muscnlar coats of stomach 

 of the bonito [Sarda sarda) (Cat. :N^o. 5458, TJ.S.KM.), Woods Holl, 

 Massachusetts, August 28, 1880. Length of embryo 0.38. of bothria 

 0.23, and of largest hooks 0.01 mm. 



Alcoholic specimens with yellowish blastocysts, the embryo a deeper 

 yellow; parenchyma of blastocyst coarsely granular. 



7. Cysts from peritoneum of the sea robin {Prio)iofiis evolans). Woods 

 Holl, Massachusetts, July 21, 1887. The cysts are, in alcohol, small 

 oval: Length, 1.0 mm.; breadth, 0.75; length of embryo, about 1 mm. 

 Proboscides of embryos retracted and arrangement of hooks not 

 evident, but bears some resemblance to L'. lonf/ispiue. Length of 

 longest hooks about 0.02 mm. (Plate III, ligs. 3, 4, 5). (Xo. 4757, 

 U.S.y.M.) 



II. 



The larvic enumerated in this section belong to the same or to closely 

 related species. 



8. Cysts from ijeritoneum of the whiting [MenUcirrus saxatilis), 

 belonging to the United States National Museum Collection ; but all 

 collected at Woods Holl, Massachusetts, by Vinal X. Edwards (Plate 

 III, fig. 0). (Xo. 4754, U.S.X.M.) 



These were collected as follows: Nov. 10, 188G; Nov. 12, 188(1; and 

 Nov. IG, 188G. 



The blastocysts, in alcoholic specimens, are nearly all dark brown, 

 especially toward jjosterior end; the anterior end, which contains the 

 coiledup embryo, is lighter colored. Length of blastocysts, in most 

 cases, 4 to 5 mm. ; a few are longer and several shorter. Length of 

 embryo 4 mm., neck tubular, bothria two, broadly elliptical, distinctly 

 emarginate and somewhat bilocular, widely divergent posteriorly. 

 Other dimensions: Length of contractile bulbs, 1.5 mm.; diameter of 

 same, 0.25; length of bothrium, 0.8; diameter of neck, 0.G8; proboscis 

 probably nearly three times the length of the bothria, with spiral 

 sheaths; hooks of various sizes — longest 0.06, shortest about 0.005. 

 Calcareous bodies numerous and large, as much as 0.05 in length and 

 0.025 in breadth, with concentric structure, showing rather smaller in 

 neck and head than behind contractile bulbs. 



Tlie proboscides were retracted, and it was not possible to make out 

 the arrangement of the hooks. Two or four rows of large hooks tlanked 

 by slender hooks, with minute hooks on opposite side, appear to be the 

 plan. It will be seen that this form bears a close resemblance to F. 

 imparispine, but large hooks not so strongly curved as in that species. 



9. Cysts from peritoneum of Fltycis tenuis (No. 4607, U.S.N.M.). 

 Collected by United States Fish Commission, 1883, station 1157. 



One specimen, when removed from the small white cyst, was found 

 to agree in all essential particulars with the specimen from MenUcirrus. 



