800 



LARVAL CESTODE PARASITES OF FISHES— LINTON. 



which, being so remarkable, it hardly seems probable that two dis- 

 tinct species could agree so closely in this particular as I find these 

 specimens to do. 



1. lihyiicliohothrinm rollicted nt Woods HoU. 



No. 



XJ.S.N.M. 



nuuilier. 



54G1 

 4743 

 5460 

 5463 



Bate. 



Host. 



Aug. 



,1884 



4772 ' July 31, 1885 

 4832 i Julv 23, 188G 

 Aug. 6, 1886 

 Aug. 19, 1886 

 Aug. 10, 1887 



do 



Aug. 30, 1887 

 July 30, 1889 

 Oct. 7, 1886 



Common Flounder (Paralichthys dentatvs), serous coat of intes- 

 tine. 

 Goosetish {Lophius pixcatorUis), mesentery. 

 Tomcod {Miruiiadus <o jn corf), serous coat of intestine. 

 Goo.se tisli, mesentery. 



Mackerel ( Scviiibrr scombnts), serous coat of viscera. 

 Siinil Flounder ( lioOnts maculatun), mesentery, etc. 

 'I'iiutog ( iaiitdiia onitis), serous coat of viscera. 

 (jooselisl), mesentery, etc. 



Sea Jiass {Centrupri.stes striatus),sn'To\\» coat of viscera. 

 Cod {Oadtis callarig), collected by S. E. Meek, Block Island. 



2. Rhyncliohotliyiitin lolleitcil hi/ I inul \. Edwards. 



This parasite occurs in cysts that are usually pyriform and sometimes 

 attached to the serou.s membrane by a pedicel. The bothria are very 

 versatile and deeply notched on distal end so as to appear in some 

 instances to be distinct bothria. 



Following are extracts from notes ninde on individual lots, numbers 

 referring to foregoing list: 



Numbers 2, -4, 8, 11, 14, lo. From Lophius 2>isci(torii(s. The cysts 

 are subglobular or pyriform; one in lot 11 measured 11 mm. in length 

 and ~) mm. in greatest breadth ; hooks on proboscides in No. 15 (fig. 12) 

 not very clearly seen on account of the proboscides being retracted; 

 large stout hooks O.OlJ mm. in length and 0.04 in breadth at base. No. 

 2 (figs. 9-11), freehand sketches from life; cysts pyriform, blastocyst 

 oblong, remaining firmly attached to embryo, when latter is liberated, 

 to form a nutrient sac. The latter is filled with coarse granular 

 parenchyma with fluid retractile bodies. In one lot the hooks in one 

 specimen were sparsely scattered, which may be due to imperfect 

 development. 



Tlie peritoneum of each of the three fish examined was filled with 

 trans] »arent subglobular cysts, averaging about G mm. in diameter. 

 The blastocysts were nearly globular when at rest, but capable of 

 much change of form by contraction. The embryo could be seen as a 



