THIRD, OR VERMICERAN BRANCH. 151 



immature-looking pilae are also characteristic and persistent in this subseries. 

 The sutures are distinctly caloceran. Our own notes made in the Museum at 

 Munich give the same results as regards this important species. Neumayr 

 clearly points them out as transitional, while calling the species an Arietites. It 

 is evident that we differ mostly in the limits which are ascribed to genera, 

 Cal. (Ariel) Loki, Wah., 1 and Cal. {Arid.) Seebacki, figured on Plate XX., indicate, 

 when compared with Cal. (Ariel.) Haueri, Wah., that Haneri must have been con- 

 nected with Johnstoni through some such flat-sided shells as the former. The 

 Cal. (Ariel) Haueri of Warmer, as figured on Plate XIX. and especially on Plate 

 XVII., shows acceleration in the earlier development of the keel and channels. 

 The specimen on Plate XVI. Fig. 3, though about the size of the specimen fig- 

 ured on Plate XVII., has very shallow channels, and an immature keel, which 

 contrast markedly with the deep channels and perfect keel of the former. Cal. 

 (Ariel.) coregonense, Wah., 2 is figured so fully that, as in Cal. Haueri, one can see 

 that the keel and channels were developed at different stages of growth, in some 

 much earlier than in others, and that old age began also in some cases much 

 earlier than in others. Cal. (Ariel.) ophioides? Wah. (not D'Orbigny's species, 

 which is a true Vermiceran species with constant channels, tuberculated pilae, 

 etc.), has also varieties in which channels are very late in appearing, and others 

 in which they appear early. Cal. (Ariel.) per spiratus, Wah., 4 a stout form of whorl, 

 but the age at which channels appear is not given. Cal. (Ariel.) supraspiralus, 

 Wah., 5 has the channels developed at an early age as compared with other 

 species. 



Caloceras Newberryi, 6 Hyatt. 



Locality. — Peru. 



Two very interesting specimens of this species have been placed in my hands 

 for identification and description through the kindness of Prof. J. S. Newberry. 

 They are reported as having been collected near, but not at, the Cerro de Parco 

 mines in Peru. The largest is 128 mm. in diameter; abdomino-dorsal breadth 

 of last whorl, 24 mm. ; transverse diameter, 20 mm. ; next inner whorl, 20 by 

 16.5 mm. It resembles the form of Cal. Nodotianum in the aspect of the sec- 

 tion when restored, and in the number, close proximity, and linear appearance 

 of the pilations. They are also similar in being slightly and evenly curved. 

 The keel is low and broad, the channels shallow and more distinct than in the 

 figure, but the abdomen similar to that of the section, Fig. 9, Plate I. The 

 outer whorl of the older stages and all the inner whorls are compressed, as 

 in the typical forms of Nodotianum. The distinct keel and shallow channels 

 appear late in the life of the shell, as is usual in that species. The living 

 chamber is incomplete, but over one volution in length. The species more 

 closely resembles Cal. proaries, Neum., than any other form of the fauna of the 

 Northeastern Alps, but differs in having flatter sides in all the whorls, an earlier 



1 Mojsis. etNeum.,Beitr., V. pi. xvii. 2 Ibid., VI. pi. xxi.-xxvi. 



a Ibid., pi. xxv. fig. 4-6. * Ibid., pi. xx. 5 Ibid., pi xx. fig. 6-9. 



* This species has been referred to previously in these pages as if identical with Cal. Nodotianum. 



