UNIVALVES_— TROCHUS. 143 
on one side. The most prominent species are the T. 
telescopium and the T. dolabratus. 
The T. conchyliophorus, T. imperialis, ‘T. solaris, T. 
perspectivus, &c. are highly valued for their beauty and 
rarity. 
The Trochus derives its name from the resemblance 
of its species to the form of a top (reoydc). 
The Trochi are found in almost every part of the 
world. 
Division 1.— Shell umbilicated, erect. 
Faminy 1.---With the pillar and wmbilicus smooth. 
Scientific Name. Locality. Common Name. 
Niloticus --..---- Ind.Ocean, China,S.Seas_ Large marble T. 
Conus ---....... East Indies, New Guinea Conic ---: do -- 
Spinosus --+----- New Zealand ---+------ Thorny --+ do-- 
Jujubinus ------- Mauritius, West Indies-- Mottled -- do-- 
Concavus ------- Coromandel, N. Zealand Concave -- do -- 
Vernalis -----.-- East Indies -------- -»+» Green ---- do-- 
Conspersus ----- Kast Indian Ocean .---- Poppy ---: do-- 
Ochroleucus ---- Ditto -----+-+-+-++) +e Whitish brown 
Stellatus -.-.-... Dini, Gutvuledoddieedands Starred’... + doc 
Spengleri Pefolaaicig Nici slave's, e.ccyatatel Verstieie tater oletele Spengler’s aor oe 
GSE Abs tarotate stoke Wshsvchasietahs, 6 tuelley te wehcrclonrs ag RD Dediesemndo ne 
Inzequalis ---+--- Mozambique ---------- Unequal -- do -- 
Regius iotedciatcteve toni (atereleretetejeraiatetetetsicte tomer cnegetene Royal siete sie (CO). 0. 
Verrucosus -++-+- East Indian Ocean ----- Warty ---- do-- 
Radiatus ---..--- West Indies, Mauritius - Radiated -- do -. 
Viridis------ --- New Zealand -+--+----- Green -+++ do - 
Fanulum ----+-. Pernambucca ------+ -- Pagoda --- do- 
Strigosus ---+---- Morocco ----- ~ ee ee eee Black lipp’d do -- 
iDGlotei po beoeon atoo aor PDO OOOO OO OE Doubtful -- do -- 
Depressus Bistotdidis Misra state sta aele late sleveterd ste acct Depressed detthoy oe 
lbeine sooolictoo coossedoccdaboo 6c ee---- Smooth --- do-- 
Groenlandicus -- Norway, Greenland ---- Greenland do -- 
Magus ---++++-- Britain +--+ ++++ssee0+-- Tuberculateddo - 
