1 88 PATAGONIAN EXPEDITIONS I PALAEONTOLOGY. 



V. Ihering believes (1897, P- 2 % l ) that Philippi's figure 18, which is 

 given as N. solida, belongs to N. ovoidea: if so, this species must grow 

 to a much more considerable size. 



N. ovoidea comes near N. 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, i 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.) 



119. NATICA SECUNDA Rochebrune & Mabille. 



PL XXXIII, Fig. 3".*. 



1885 N. secunda Rochebrune & Mabille, in: Bull. Soc. Philom. Paris, 



sen 7, v. 9, p. 103. 



1887 N. obtecta Philippi, Tert. & Quart. Verst. Chiles, p. 88, pi. 10, f. 2, a, b. 

 1887 N. vidali Philippi, ibid., p. 91, pi. 10, f. 17. 

 1889 TV. secunda Rochebrune & Mabille, in: Miss. Sci. Cape Horn, v. 



6, p. 39. 

 1897 N. obtecta v. Ihering, in: Rev. Mus. Paul., v. 2, p. 282. 



1899 A", o. v. Ihering, in : N. Jahrb. Miner., etc., v. 2, p. 27. 



1900 N. 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, N. secunda of 

 Rochebrune and Mabille is identical with N. 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. 



N. obtecta of Moericke (1896) is different; v. Ihering calls it (1897, p. 

 283) N. pachystonta 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.). 



