A remarkable Cysticercus from a rare Dolphin. 417 
XLI.— A remarkable Cysticercus from a rare Dolphin 
(Cysticercus Teenie Grimaldi, Montez, 1889). By H. A. 
Bay is, M.A. 
(Published by permission of the Trustees of the British Museum.) 
In May 1917 a specimen of the rare dolphin Lagenorhynchus 
acutus was stranded at Skegness, on the Lincolnshire coast. 
It was sent to the British Museum (Natural History), and 
during its dissection by Mr. W. P. Pycraft there were found 
under the peritoneum large numbers of cysts. ‘These con- 
tained blood-stained fluid, and in each of them, lying free in 
the fluid, was what appeared to be a Cysticercus. In some 
cases there were also two or three hard calcareous concretions 
in the fluid, and in one cyst the fluid was milky and opaque. 
A number of the cysticerci were carefully preserved by 
Dr. W. T. Calman, to whom I am indebted for the foregoing 
details of information. Dr. Calman also observed that on 
removal from the host (which had been dead at least eleven 
days) the worms still showed signs of life, and “responded 
by feeble but quite distinct contractions when prodded with 
a needle.” 
‘he worm appears to be identical with a form described 
by Moniez (1889) under the name of “ Cysticercus Tenie 
Grimaldii” *, the sexually mature form of which is unknown. 
Although Moniez observed the most striking feature of the 
animal—viz., its long neck—he does not describe the anatomy 
very fully, and gives no account of the important characters 
of the scolex. Further, no figures of this remarkable form 
are given. It is thought worth while, therefore, to give here 
a somewhat fuller description, including some account of the 
scolex, which has features of systematic value. 
ANATOMY. 
The cysticerci are yellowish-white in colour (in spirit) and 
are of very variable size and shape. The length varies from 
about 8 to 25 mm., according to age and state of contraction. 
* The Cysticercus Tenie Grimaldii is apparently closely similar to, if 
not identical with, Stenotenia delphini, Gervais, 1870; from this author’s 
description it appears that he took the “neck” to be the worm itself, and 
the bladder of the cysticercus to be a second cyst containing it. 
