242 SURCULA. 
S. Owrenn, Gray. PI. 7, fig. 91. 
Whorls encircled by a row of compressed tubercles at the 
periphery, and a smaller one beneath the suture; below the 
periphery granulated by the intersection of fine revolving riblets 
and close curved growth cost; cream-brown or nearly white, 
often orange-tinged at the extremity of the spire. 
L. 30, diam. 11 mill. 
Australia. 
S. Quoyi, Reeve. PI. 7, fig. 95. 
Shell yellowish brown, with a double row of small. compressed 
nodules on the periphery, above which the surface is slightly 
concave to a subsutural, slightly nodulous band, which is 
regularly square-spotted with chestnut; lower part of body- 
whorl with revolving, fine ridges and striz. 
L. 28, diam. 12 mill. 
Australia. 
With this species Reeve and Weinkauff: unite P. monile, Val. ; 
it appears to me more nearly related to the group Perrona. 
The following species of Surcula have been described by Rey. 
Robert Boog Watson in the ‘“ Mollusca of the Challenger 
Expedition.” They have not been figured. 
P. sTAMINEA, Watson. Kerguelen, Prince Edward Isl., ete. 
P. TRILIX, Watson. Kerguelen and Heard Isl. 
P. Lepra, Watson. Southern Ocean, Southeast of Australia. 
(Resembles P. clara, von Martens, from Patagonia. ) 
P. RoTUNDATA, Watson. Pacific, East of Japan. 
P. Gon1oDEs, Watson. Southeast of La Plata. 
(Resembles in a general way P. circinata, Dall.) 
P. PLEBEIA, Watson. Off Pernambuco. 
(Something like P. nodifera, Lam.) 
P. sYNGENES, Watson. Off St. Thomas, West Indies. 
P. HEMIMERES, Watson. Pernambuco. 
P. ANTERIDION, Watson. Off Cape of Good Hope. 
P. ruysa, Watson. Pernambuco. 
P. BOLBODES, Watson. . Pernambuco. 
P. iscana, Watson. Northeast from New Zealand. 
(Resembles P. emendata, Monterosato, of the Mediterranean. ) 
