126 Scientific Intelligence. 
ris mcisa A. Ag. (E. longispina Lutk.) is referred to &. stellata Ag.; 
Boletia rosea A. Ag. is referred to Lytechinus; Eneope tetrapora Ag, 
(non Gm.) is redeseribed under the new name, z. occidentalis ; Kleima 
nigra A, Ag. is referred to Meoma Gray; Metalia (Gray’s subgenus of 
Brissus) is made identical with Xanthobrissus A. Ag. Four a 
Heliaster are recognized. 
ing ae. but a very anal erab found res among the spines appeats 
to be the male. The crab probably effects an entrance into the intestine 
throngh the anus while quite young, and, by its presence and growth in 
that position, causes the gradual distortion of the shell and formation of - 
the cyst. In Prof. Dana’s Report on the Crustacea of the U. S. Exph 
Expedition this crab is described as from Valparaiso, from an Echinus, 
but no special notice of its mode of occurrence and remarkable frequent 
appears to have been published.* 
‘peculiar mode of parasitism I have observed in a singular erus- 
tacean G2 ena nol a Stimpson) from the Sandwich Isl 
sions cnet Fe 9 terminating in digitations, which often interlock me : 
leaving openings between them suitable for the uses of the parasite, but — 
usually too small to allow of egress, Most specimens of the corals of this 
One or more, and often numerous, examples of these cu 
species s 
ee enlarged balla pon _ g met bexeche. The habits were pemmer 
. Stimpson, when | his s 
omen preset SE eee specimens, which had dropped 
st n the external characters of the Young of the Central American 
Tap 2 (aeogaciien ; by A. E. Verrrit.—This 
ble animal has — been known only We its skull, and a skeleton, not 
