Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
2. 
AGASSIZ: PRELIMINARY REPORT ON THE ECHINI. 85 
PLATE VI. 
. Phormosoma hispidum A. Ag., from the abactinal side, odd anterior ambu- 
lacrum on the left. 
. Phormosoma hispidum A. Ag., (a larger specimen,) from the abactinal side, 
odd anterior ambulacrum on the left. 
All figures natural size. 
PLATE VII. 
. Phormosoma hispidum A. Ag., (same as Fig. 1, Pl. VI.) from the actinal 
side, odd anterior ambulacrum on the left. 
Phormosoma hispidum A. Ag., from the actinal side, odd anterior ambula- 
crum on the left. 
All figures natural size. 
PLATE VII. 
. Pourtalesia Tanneri A. Ag., from the abactinal side. 
Pourtalesia Tanneri A. Ag., in profile. 
Plexechinus cinctus A. Ag., in profile. 
Plexechinus cinctus A. Ag., from the abactinal side. 
Aérope fulva A. Ag., from the abactinal side. 
Aérope fulva A. Ag,, in profile. 
Urechinus giganteus A. Ag., from the abactinal side. 
Urechinus giganteus A. Ag., in profile. 
All figures natural size. 
PLATE IX. 
Cystechinus Loveni A. Ag., in profile. 
Cystechinus Loveni A. Ag., from the abactinal side. 
All figures natural size. 
PLATE X. 
Cystechinus Rathbuni A. Ag., facing the anal system. 
Cystechinus Rathbuni A. Ag., from the abactinal side. 
All figures natural size. 
PLATE XL 
Homolampas hastata A. Ag., from the abactinal side. 
Schizaster latifrons A. Ag., from the abactinal side. 
Schizaster latifrons A. Ag., from the actinal side. 
Toxobrissus pacificus A. Ag., from the abactinal side. 
Toxobrissus pacificus A. Ag., from the actinal side. 
Periaster tenuis A. Ag., from the abactinal side. 
. Periaster tenuis A. Ag., from the actinal side. 
All figures natural size. 
VOL. XXXII. —NO. 5. 2 
