Bulletin - United States National Museum - Smithsonian Institution

178 BULLETIN 91, UNITED STATES NATIONAL MUSEUM.
Order POLYPLACOPHOEA.
Family ISCHNOCHITONIDAE.
Genus CALLOCHITON Gray.
CALLOCH1TON CASTANEUS Wood.
Cat. No. 186907, U.S.N.M., contains four valves of this species from
Port Alfred (Coll. No. 277). Cat. No. 249828, U.S.N.M., contains
two additional complete specimens from the same locality (Coll.
No. 1100).
Genus ISCHNOCHITON Gray.
ISCHNOCHITON CRAWFORDI Sykes.
Cat. No. 250603, U.S.N.M., contains a specimen from Port Alfred
(Coll. No. 1476). Cat. No. 187140, U.S.N.M., contains a single valve
from the same place (Coll. No. 686).
ISCHNOCHITON CYANEOPUNCTATUS Krauss.
Cat. No. 125380, U.S.N.M., contains a specimen obtained on the
United States Eclipse Expedition of 1890 at Cape Town.
ISCHNOCHITON ONISCUS Krauss.
Two lots of this species were obtained by William Stimpson on the
North Pacific Exploring Expedition: One, Cat. No. 122, U.S.N.M., a
complete specimen and a lot of valves, at the Cape of Good Hope; the
other, Cat. No. 143, U.S.N.M., one specimen at Simons Bay, Cape of
Good Hope. In addition to these there are 35 lots of this species,
which are extremely variable in color markings, in the collection of
the United States National Museum, from Port Alfred, as follows:
Cat. No. 187137, one specimen (Coll. No. 683); Cat. No. 187136, one
specimen (Coll. No. 682); Cat. No. 187138, one specimen (Coll. No.
684); Cat. No. 187140a, one valve (Coll. No. 686a); Cat. No. 249803,
three specimens (Coll. No. 1075); Cat. No. 249804, three specimens
(Coll. No. 1076); Cat. No. 249805, three specimens (Coll. No. 1077);
Cat. No. 249806, three specimens (Coll. No. 1078) ; Cat. No. 249807,
two specimens (Coll. No. 1079); Cat. No. 249808, three specimens
(Coll. No. 1080); Cat No. 249809, three specimens (Coll. No. 1081);
Cat. No. 249810, three specimens (Coll. No. 1082); Cat. No. 249811,
three specimens (Coll. No. 1083); Cat. No. 249812, one specimen
(Coll. No. 1084); Cat. No. 249813, three specimens (Coll. No. 1085);
Cat. No. 249814, two specimens (Coll. No. 1086); Cat. No. 249815,
three specimens (Coll. No. 1087); Cat. No. 249816, two specimens
(Coll. No. 1088); Cat. No. 249817, three specimens (Coll. No. 1089);
Cat. No. 249822, two specimens (Coll. No. 1094); Cat. No. 250606,
one specimen (Coll. No. 1479); Cat. No. 250608, one specimen (Coll.
No. 1481); Cat. No. 250609, one specimen (Coll. No. 1482); Cat. No.
250610, two specimens (Coll. No. 1483); Cat. No. 250611, two speci-