THIRD, OB Vi:i;\ll( EB \N BRAXI II 101 



immature-looking pfl«B are al-'> characteristic and persistent in this buI 



distinctly caloceran. Our own notes made in the Museum at 

 Munich give the Bame result* rds tliis important Neuraayr 



dearly points t li.-m out as transitional, while calling th a Arietites [1 



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

 ('ill. i.l ' /. . W.ili ..' and Cat. (A s , fig ed on Plate XX.. indicate, 



when compared with I Hanoi, Wah., that II ■ must have been con- 



i through M>iiic such flat-sided Bhells as the former. The 

 ( I // : Wahner, as figured on Plate XIX. and especially on Plate 



XVII celeration 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 Bhallow channels, and an immature keel, which 

 contrast markedly with the deep channels and perfect keel "I the former 



I . W.ih.-' i- figured bo fully that, as in Cat. II in Bee 



that the keel and channels were developed at different si growth, in 



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

 earlier than in others ( I Wah I D'Orbigny'a bj 



wliich is ;i true Vermiceran species with constant channels, tuberculated 



rieties in which channels are very late in appearing, and others 

 in which they appear I I perspinztus, Wah.,* a stout form of whorl, 



but the age at which channels appear is not given. Gal A iel.) supratpiratus, 

 Wah., 1 has the channels developed at an early red with 



Caloceras Newberry i, iiivn-. 



very interesting specimens of this species have 1 n placed in my hands 



fir identification and description through the kindness of Prof. ■' v Newberry. 

 They are reported as having been collected near, but not at, the Cerro de 1 



in Pern. I - 128 mm. in diameter; abdomino-dorsal breadth 



it whorl. "Jl nun.: transverse diameter, "J<» mm.; next inner whorl, 'J<> by 

 ties the form ol ' \ dotiantm in the aspect <>t' th 



ti<>n when restored, and in the number, cl proximity, and linear appearance 



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

 The keel i- Ion and broad, the channels -hallow and more distinct than in the 

 . hni the abdomen similar to that of the - P ■"• • The 



outer wborl of the older stages and all the inner whorls arc compressed, as 

 in the typical form* The distinct keel and shallow channels 



late in the life of the shell, as is usual in thai - 

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



V.'iiin.. than any other form of tl 

 Northeastern Alps, but differs in having flatu i dl the wl 



