NO. 1123. PROCEEDINGS OF THE NATIONAL MUSEUM. 789 



in the spleeu of its Lost appears to be a Ligula. Its length, in life, 

 was 100 mm., the breadth of the anterior fourth about mm,, that of 

 the posterior three-fourtlis about 2 mm. When placed in sea water, 

 constrictions formed at intervals tliroughout the length, and the ante- 

 rior end, which before was refuse, became conical. 



The alcoholic specimen is quite irregularly contracted, but at the 

 anterior end it is smooth, regtilar, witli conical apex. Transverse striiB 

 begin about 2 mm. from the anterior tip. Transverse sections show 

 the muscular layers of the body wall and the central parenchyma with 

 the beginnings of the reproductive organs. 



2. Cysts from Bonito. 

 (Plate I, tigs. 2, 3.) 



Small cysts from peritoneum of the bonito {Sarda sarda) Woods IToll, 

 Massachusetts, August 5, 1889 (No. 1785, F.S.X.M.). 



Dimensions of alcoholic specimens : Length of cyst, 2.5 mm. ; breadth, 

 1.25 ; length of embryo, 2.25 ; diameter of embryo, 0.34 to 0.43 ; princii)al 

 diameters of one of the oval bodies at larger end. 0.044 and 0.018 — of 

 another, 0.035 and 0.022. 



The cysts look like Dihotlirium cysts. The larva^ are worm-like in 

 shape, with a thin body wall in which are both longitudinal and circu- 

 lar fibers. Oval and spheroidal bodies which do not yield carbon diox- 

 ide with acetic acid fill the interior of the body at the larger end and 

 extend to near the middle of the body. These bodies give to that part 

 of the body in which they lie a dark amber color. Elsewhei-e the body 

 of the alcoholic specimen is light yellow. 



Forms similar to these noticed among sj^ecimens from i)eritoneum of 

 file-fish {Abitera sclKjepiii) Woods Holl, Massachusetts, Angust 5, 1889. 



3. Larval ECHENEIBOTHRIA. 



(Pl:ite 1. ligs. 4-1."-).) 

 Eclieiieiholliriii. I.ixTox, W S. Fisli ( 'oiii. Kept., 1886, pp. 4."'>o, 454, pi. vi, i\gs. 6, 7. 



1. During the months of July and August, 1889, at the Fish Commis- 

 sion Laboratory, Woods Holl, Massachusetts, I examined, in all, seventy- 

 three specimens of squeteague {Cynoscion regali.s) and in all instances 

 found the cystic dnct infested with, as a rule, enormous numbers of 

 larvie. 



These forms have already been noticed and figured, and since 1 

 have made no special study of their structure, I simply add here a few 

 extracts from notes made at the time of collecting. 



In some specimens two small red granular patches were observed on 

 neck, back of head. Length, when extended, as much as 7.5 ram., con- 

 tracting to 1.5 mm. In one lot the length when extended was from 5 to 

 G mm., the breadth varying from 0.18 to 0.30 with the amount of 

 expansion. 



A small specimen in this lot with costate bothria had no red patches 



