I 
J*' 
r'>-i 
5'. Merriarnium ro^osevelt^, 
(P d h C ^ < Hs 
Th^ S‘^©«*!fte4a was ecr’’ '’ ' 
Albemarle sG-alapagos 
anchor chain. It ds number 20-36 of U.S.h.M. ho."^! 
( stfi.zo -3ai» 
ulv 26th. 19^^ at Elizabeth Bay, 
— 4roA\ 
scraped ti^ an old 
It cov- 
> 
ers some other object, perhaps a barnacle, and is one or two mil- 
V limeters thick, rljyiifib ^to lor is nearly white, consistency soft. The 
entire organism is very fine-grained, v;ith pores and oscules too 
small to be made out. The most remarkable items involved concern 
the skeleton; three sorts of spicules are present. 
% 
1. Ectosomal special spicules are tylotes 3 by 180 ml era. 
2. Endosomal solcules are abundant acantho styles , heads with 
A--- 
tubercles rather than spines, size 11 by 120 to 15 "toy 
170 mi era. 
3. Microscleres are abundant arcuate isochelas with a semi- 
clrcularly curved shaft and very small clads; the chord 
diameter varies from 21 to 24 micra. . 
lic^ '% 'itti* Sgv<?»^c»^ \s ^ e «rr« 
A r^lew^ of the genus merriarniu®! m ay help in Sh(TWl1ig Ctrs plauH" uT ■ 
S|^4o‘.e5 l<iyg 'Vv>c>*«~ ly.arj 
t - hi - 5 - ~ »oc c i e s=:i n 5 i^the -~ gr o u ft^ c>(^yl^et »' v'«(ar<*<-» 0e4.cU 
.£v5x»«c*.<?s *1/ Oe 
errj 
Merriarnium atlanticufti 'was described as Ectyodor'vx a. by Stephens 
1916 p.238 from Ireland. The ectosomal spicules are inequiended 
V ^ s 
strongyles , T!he endosomal^ vary from entirely spined to 
•nly\spined 
on the heads. All the spicules are much larger than in rooseveltl^ . 
te. Merriarnium buchani was described as Llssodendoryx k*by Topsent 
1913 p.626 from the Antarctic. The ectosomal spicules are hastate 
tornotes. The endosomal spicules are only rarely tuberculate, and 
all the spicules are much larger than in roosevel til . 
