86 PATAGONIAN EXPEDITIONS : PALAEONTOLOGY. 



Distribution: Port Desire (Sow.); Santa Cruz, Patagonian formation 

 (v. Ih.). 



Affinities: Nucula volckmanni Philippi (1887, p. 194, pi. 41, f. 9) from 

 the Navidad beds (Tubul and Lebu) has more crowded concentric ribs 

 and the posterior margin is more obliquely truncate : otherwise it is very 

 closely allied. 



The New Zealandian living species Solenella australis Quoy & Gaim. 

 (see: Reeve, 1873, pi. i, f. 4) is found, according to Zittel (1864, p. 47, 

 pi. 13, f. 2) and Hutton (1873, p. 29 and 1886, p. 364) also in the fossil 

 state in New Zealand, in the Pareora and Wanganui beds (Miocene and 

 Pliocene). This species is also closely allied to the Patagonian form, 

 although differing a little more in outline. From the older Tertiary 

 deposits this type of shell is not known. 



Fam. PARALLELODONTIDA1 Ball. 



Gen. CUCULL^EA Lamck. 

 27. CUCULL/EA ALTA Sowerby. 



PI. XXV, Fig. 4. 



1846 C. a. Sowerby, in: Darwin, Geol. Observ. S. Amer., p. 252, pi. 2, 



f. 22, 23. 



1873 C. a. Hutton, Cat. Tert. Moll. Echin. N. Zealand, p. 27. 

 1885 C. a. Hutton, in: Quart. Journ. Geol. Soc., vol. 41, p. 551. 

 1897 C. multicostata v. Ihering, in: Rev. Mus. Paul, v. 2, p. 240, pi. 4, f. 



20, pi. 5, f. 29. 



1897 C. dalliv. Ihering, ibid., p. 241, pi. 7, f. 47, pi. 8, f. 51. 

 1899 C. dalliv. Ihering, in: N. Jahrb. Min. Geol. Pal., vol. 2, p. 12. 



1899 C. alta v. Ihering, Ibid., p. 13. 



1900 C. alta Ortmann, in: Amer. Journ. Sci., v. 10, p. 379. 



Shell variable in outline, elongated-rhomboidal, shorter or longer, thick 

 and inflated. Surface finely radially striated, and with fine, undulating, 

 concentric lines of growth. Anterior end short, rounded, posterior nar- 

 rowed, and a little produced to an obtuse angle. Apex high and incurved, 

 a very indistinct and rounded angulation running down from the apex to 

 the posterior end. Area large, according to age with 1-9 rhombiform sulci. 



