No. 414.] 
NORTH-AMERICAN INVERTEBRATES. 
Fics. 12-18. 
12. Anchor of Synafta scd (O. F. Müll). x 225. 
13. Plate of the same species. x 22 .* 
14. Wheel of Chiridota rotifera | (Pourt. J)e X235. 
15 ig sade (Gould). Seen from above. X 105. 
16. The seen from + & ros. 
17. Table of t Tr ochostoma boreale (Sars). 105. 
18. Reddish-brown deposits of chimie, iie boreale (Sars). X 105. 
f Dorsal scales with fine granulations; sole with 
Body depressed oval, lates ; 130 
Scattered, irregular, reticulate plate: 
chiton-shaped xe abr (D. & K.) 
anal re- l 
E us d North Atlantic; common on New England coast in shallow 
Er ers Leer. Paaie Grove, Cal. (?) 
pedicels forming 
complete rows 
color generally 
Some shade of 
Orange or red. 
Size small, 20 mm. long by 8 wid 
very — perforated -— 
On along shore at Pacific Grove, Cal. 
L 
Dorsal scales with coarse granules; sole wi 
reticulate cups or spheres P. peo in & K) 
maller than preceding, but poesie identical with it; eastern 
North votes from Massachusetts to Greenland; also on 
Alaskan c 
Dorsal scales, without evident granules; sole 
with crowded k obbed, perforated plates 
65m ET T : P. P diasin Clark 
"iit "noe 
T iere 
; red; deposits, reticulated cups and 
; th Mg os the bet 
carries the TE T. nutrians Clark 
