276 New Species Found. [cHAP. Xv. 
the entrance being invariably at the top. ‘These nests,” 
says Mr. Bate, “are evidently used as a place of refuge and 
security, in which the parent protects and keeps her brood 
of young until they are old enough to be independent of 
the mother’s care.” The preceding illustration is taken 
from Messrs. Bate and Westwood’s book. In this case, the 
nests were built in Plumaria, off Polperro, Cornwall. 
A few extracts from Mr. Norman’s and Mr. Bate’s letters 
will serve to show the numerous new species which Ed- 
ward continued to forward to these eminent zoologists. 
Mr. Norman (September 24th, 1862) writes: “The Mysis 
I referred to in my last letter is undescribed; and I pro- 
pose to call it Mysis longicornis. Might I be allowed to 
keep the specimen? I retain it, at any rate, for the pres- 
ent, in order to draw up a description and figure. 
“T have made a most important discovery since I last 
wrote. On looking again at the specimens [of the Para- 
sites taken by Edward from the sun-fish], I find that I had 
confused two species together as Lemargus muricatus, and 
had passed by as the male of that species (looking at them 
only with the naked eye) a distinct species, which is new to 
Britain, and which IT am at present unable to name.” 
Mr. Norman wrote again (January 3d, 1863): “Thanks 
for the Hyperia, which belongs to a different species from 
those you previously sent me. At present I can not name 
them. The Annelid—a very curious fellow—I know noth- 
ing of. I will name the sea-spider Vympham. The treas- 
ure of the bottle was, however, the little white shrimp. It 
is new to Britain, and possibly to science. We will call it, 
at any rate for the present, Thysanopoda ensifera, new spe- 
cies. The genus is a very interesting one; and only one 
species, Thysanopoda Couchii, was previously known in our 
seas.” 
A few days later, Mr. Norman wrote to Edward: “I 
gladly accept your suggestion that the Thysanopoda should 
be called 7. Batei (instead of ensifera), and I am as glad as 
