1 88 PATAGONIAN EXPEDITIONS I PALAEONTOLOGY. 
V. Ihering believes (1897, P- 2 8 i) that Philippi’s figure 18, which is 
given as TV. sohda , belongs to TV. ovoidea: if so, this species must grow 
to a much more considerable size. 
N ovoidea comes near TV. chiloensis , but is distinguished by the thinner 
shell and much thinner callus, which leaves a larger portion of the umbilicus 
open ; and further, the mouth is wider. 
Record of specimens: Mouth of Santa Cruz River, 5 sp.; San Julian, 
Darwin Station, 1 cast. 
Distribution: Santa Cruz, Patagonian beds (Phil., v. Ih. ) ; Navidad beds 
of Chili: Navidad, Tubul, Llancahue (and perhaps Lebu, of fig. 18 belongs 
here). (Phil.) 
1 19. Natica secunda Rochebrune & Mabille. 
PI. XXXIII, Fig. 3 “’ 6 . 
1885 TV. secunda Rochebrune & Mabille, in: Bull. Soc. Philom. Paris, 
ser. 7, v. 9, p. 103. 
1887 TV. obtecta Philippi, Tert. & Quart. Verst. Chiles, p. 88, pi. 10, f. 2, a, b. 
1887 TV. vidali Philippi, ibid., p. 91, pi. 10, f. 17. 
1889 TV. secunda Rochebrune & Mabille, in: Miss. Sci. Cape Horn, v. 
6, p. 39. 
1897 ^ obtecta v. Ihering, in: Rev. Mus. Paul., v. 2, p. 282. 
1899 TV. o. v. Ihering, in : N. Jahrb. Miner., etc., v. 2, p. 27. 
1900 TV. secunda Ortmann, in: Amer. Journ. Sci., v. 10, p. 180. 
Shell semi-ovato-globular, thick, smooth. Spire short, suture incon- 
spicuous. Umbilicus large, covered in part by a thick callus, which is 
divided by a groove. 
Height, 40 mm, diameter, 42 mm; another individual: Height, 32 
mm, diameter, 33 mm. 
Remarks: As v. Ihering (1899, p. 6) has pointed out, TV. secunda of 
Rochebrune and Mabille is identical with TV. obtecta of Philippi ; since 
the specific name of secunda was already published in 1885 in a prelimi- 
nary note, this name has precedence over that given by Philippi. 
TV. obtecta of Moericke (1896) is different; v. Ihering calls it (1897, p. 
283) TV. p achy stoma var. moerickei. 
Record of specimens : Mouth of Santa Cruz River, 16 sp. 
Distribution: Santa Cruz (Phil., v. Ih.), Jegua quemada and La Cueva 
(v. Ih.), Patagonian and Suprapatagonian beds (v. Ih.) ; Navided beds 
of Chili: Navidad, Matanzas, Chiloe (Phil.). 
