486 : DR. R. O. CUNNINGHAM ON THE REPTILES, 
MYTILIDA. 
111. Myrtus CHILENSIS, Hupe. 
This species is common in the Strait of Magellan, Chiloe, and Chili, and is one of the 
principal articles of diet of the Fuegians. Pearls are frequently to be met with in this 
species—a fact which did not escape the observation of some of the earlier navigators in 
the Strait. 
112. MYTILUS MAGELLANICUS, Chemn. 
This species is common in the Strait of Magellan, as well as at the Falkland Islands. 
113. Myris ovauıs, Lam. 
I obtained specimens of this species in the western channels. 
114, MoDIOLARCA TRAPEZINA, Lam. 
This is one of the most abundant mollusks in the Strait of Magellan and western 
channels, being attached by a gelatinous byssus in myriads to the fronds of the Macro- 
cystis. "The shell varies greatly in colour, being sometimes of a pale-yellow tint, and at 
others dark olive, verging on black. ; 
ARCADE. 
115. LEDA, sp. 
Many specimens of a small Leda were dredged at Port Tamar, in the western part of 
the Strait of Magellan. 
116. YoLpra, sp. 
Specimens of a fine Yoldia were dredged at the Otter Islands in December 1868; and 
one was also obtained at Playa-Parda Cove in J anuary 1869; but I have not succeeded 
in finding them at the British Museum, though they are recorded in the register. 
UNIONIDA. 
117. Unio CHILENSIS. 
_ Specimens of this species were obtained for me by Mr. Gray, the Navigating Lieu- 
tenant of the * Nassau,' àt Limache, not far from Valparaiso. 
Lucivma. 
118. KELLIA BULLATA, Ph. 
Dredged in the eastern part of the Strait of Magellan. 
| CYPRINIDA. 
119. AsTARTE LONGIROSTRIS, D'Orb. 
Common in the eastern part of the Strait of Magellan. 
120. Carprra Tuovazsir, D'Orb. 
Dead valves of this species were dredged at Sholl Bay. 
