Bull. U. S. F. C. 1899. (To face page 492.) 
Plate XX. 
228. Cestode larva from intestine of Decaptcnis macarellas; a to cl, 
sketched from life; c, alcoholic. Tnese different forms were 
assumed by the larva in rapid succession, and by such con- 
tractions a progressive movement was effected. 
The top of tli e figure in each case is the anterior end. 
229. Blastocyst in cyst from body cavity of Clupcaharcngus , R/iyncho- 
bothrium sp. x 20. 
230. Larval cestode from a squid ( Lolicjo pealii) in stomach of Ci/no- 
s cion recjalls ; life, x 65. 
At the base of each petal-like bothrium there is a short conical 
process, sharp and hooklike, but of dense striated structure, like 
the hooks of Tki/sanocephaluni. Beside each of these processes 
there is a, circular organ like an auxiliary acetabulum, not seen 
in the living specimen, but visible when mounted in glycerine. 
231. Phyllobothrium sp. from intestine of Mniurrius bilinear is; life. 
x 1. 
232. Head, much enlarged, m, Myzorh vnehus. 
233. Scolex of a cestode, which is probably a new genus, from intes- 
tine of Lo'pholotilus chainxleonticeps; alcoholic, x 50. 
234. Front view of same. 70. (See also tigs. 236-23^.) 
235. Crossobothrium laciniafum Linton, from Carcharias lit! oralts. 
Abnormal segment of young strobile. - 50. 
