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 Solenetta australis Quoy & Gaim. 
(see: Reeve, 1873, pi. 1, 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. PARA LLEL OD ON TID Ad Dali. 
Gen. CUCULLaEA Lamck. 
27. Cucullaea alta Sowerby. 
PI. XXV, Fig. 4"'A 
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 fnulticostata v. Ihering, in: Rev. Mus. Paul, v. 2, p. 240, pi. 4, f. 
20, pi. 5, f. 29. 
1897 C- dalli v. 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. 
