The Amphibians and Reptiles of Sinaloa, Mexico - Smithsonian ...

212 UmvEEsrrY OF KANSAS PUBLS., MUS. NAT. HIST.
Literature record.—12 mi. SE Los Mochis (Bogert and Oliver, 1945:407).
Additional records.—9.9 mi. N Mazatian (FAS 14479); Sinaloa [state?]
(AMNH 3928-31, 62264).
Family Hydrophiidae
Pelamis platurus (Linnaeus)
Anguis phtura Linnaeus, Syst. Nat., 12th ed. p. 391, 1766 (based on a
specimen from Pine Island, Pacific Ocean).
Felamis platurus: Gray, Ann. Philos., p. 15, 1825.
Remarks.—Two specimens are black above and yellow below,
and the two colors are sharply defined. This is pattern type one
according to M. Smith (1926:118). One specimen (KU 63430) has
lateral black spots posteriorly and represents pattern type four.
Two specimens (KU 63430, 63741) were found on the beach on
February 15 and March 1, 1961, respectively. Other individuals
were taken in October and June.
Distribution in Sinaloa.—This sea-snake is known from the ocean
adjacent to southern and extreme northern Sinaloa and from an
estuary near Teacapan. See Fig. 81.
Specimens examined.—Isla Lechuguiha "near Rio del Fuerte" (RSF 473);
Mazatlan ('KU 63430; LACM 7231); 1 mi. N Mazatlan ('KU 63741);
Teacapan (LACM 7232).
Literature records.—Mazatlan (Smith, 1943a:458); 15 mi. offshore between
Mazatlan, Sinaloa and San Bias, Nayarit (Burt and Burt, 1932:572).
Additional record.—Sinaloa? {USNM 65833).
Family Viperidae
Agkistrodon bilineatus bilineatus (Gunther)
Ancistrodon bilineatus Gunther, Ann, Mag. Nat. Hist, ser. 3, 12:364, 1863
(type locality, Pacific Coast of Guatemala).
Agkistrodon bilineatus bilineatus: Burger and Robertson, Univ. Kansas Sci.
Bull., 34:213, October I, 1951.
Remarks.—Two males have 133, 131 ventrals; 24, 24 single and
42, 39 divided subcaudals; 25-23-20, 24-23-19 dorsal scale rows; 8-8,
8-8 supralabials; 11-11, 11-11 infralabials; 2-2, 2-2 preoculars; 2-2,
2-2 postoculars; 2-2, 2-2 suboculars; and 4 + 4/4 + 4, 3 + 5/3 + 5
temporals. The lower white line on the side of the head is bordered
below by a dark line posterior to the second supralabials (see
Burger and Robertson, 1951:214, diagnosis) and the body and tail
blotches are indistinguishable. Two specimens of unknown sex
(KU 73643-44) have 133, 131 ventrals, and 23 scale rows at midbody.
Several individuals were collected at night on the road in areas