Paleontology Zorritos Formation* 53 



Malea cainura Brown and Pilsbry, Proc. Ac. Xat. Sc. Phila., 

 vol. 63, p. 356, 1911. 



? Doliitm (Malca) sp., (vielleicht eine neue Art) Toula, Jahrb. 

 kk etc., vol. 61. p. 500, 191 1. 



Doliuin (Malca) camura Woodring, Bowden Ms. 



The specimens from Zorritos are large and heavy, although 

 not as ponderous as some of the extremely developed An- 

 tillean specimens. The spire is somewhat high. One large 

 distorted cast was probably about 78 mm. high when com- 

 plete. Height, about 60 mm. ; diameter, 42 mm. 



Three casts of this species, with enough of the shell remain- 

 ing to make identification fairly sure, occur in Xelson's col- 

 lection. Thev have the somewhat high spire characteristic 

 of the specimens from Gatun, and thus diflFer somewhat from 

 the Santo Domingan forms, which have a lower spire. The 

 Bowden specimens are much smaller, but in proportion are 

 identical with those from Peru, the contour of the body 

 whorl and the apical angle of the spire agreeing entirely. 

 The Zorritos specimens are in a bad state of preservation, 

 and the characteristic swollen outer lip has been broken oflf ; 

 a difference in that part of the shell is the only one which 

 might alter the determination here offered. Toula has fig- 

 ured fragments of a Dolinm from Gatun which is probably 

 of the same species ; it is accordingly placed tentatively in 

 the synonymy of D. camura. 



Zorritos formation. Zorritos district. 



Dolinm (Malca) sp. indet. 



A cast of a large Dolinui very close to D. camura Guppy 

 occurs in the collection from the \'ariegated beds. It differs 

 from that species in being more globose, with a much lower 

 spire. The sculpture apparently agrees. The spire appears 

 to be almost flat. Height of cast. 66: diameter. 65.5 mm. 



This specimen, which occurs in the form of a cast lacks 

 the lower columella and the early whorls of the spire in addi- 

 tion to most of the shell. It is thus not describable in detail 



