r 



PLATE XIV. 



EusTHENOCERAS HuLLi, L. G. lie KonincJ-, sp. 



Fig. 1 (/. Lateral view of a specimen wanting the body-chamber and a small 

 portion of the apical end; a short piece (about 1-5 mm.) of the upper end has 

 been omitted, as it made the specimen too long for the plate. 1 b. The nearly- 

 circular transverse section showing the siphuncle. 1 c. Section at tlie apical end 

 of an elliptical form. 3. Longitudinal section of another specimen of this species, 

 showing the septa which have become coated over with a crystalline deposit of a 

 fibrous nature ; the necks of the septa are well preserved, but the siphuncle has 

 become absorbed in the process of crystallisation ; there are obscure remains of it 

 in the upper part of the section, which seem to indicate that it was of cylindrical 

 form, but this is by no means clear. The lighter tinted and white parts of the 

 section represent crystalline calcite, which often fills these chambered shells to the 

 destruction, partial or complete, of the internal parts. Rathkeale. Dublin 

 Museum of Science and Art (Geological Survey of Ireland Collection). 

 (Page 39.) 



EusTHENOCEEAS Bailyi, L. G. de Koiiincl, sp. 



Fig. 2 a. Lateral view of a nearly complete specimen (cast), showing the 

 septa (sutures) and the greater part of the body-chamber ; the extreme apex is 

 broken off. 2 h. The last chamber viewed from above, showing the position of 

 the siphuncle. Samphire Island. Dublin Museum of Science and Art (Geological 

 Survey of Ireland Collection). (Page 42.) 



