208 CABBONIFEROUS CEPHALOPODA OF IRELAND. 



lopods;" Foui'tli Annual Report, 1892, p. 460), which I append here for comparison 

 with that of Syringoceras : — " The whorl increases very rapidly by growth, and the 

 living chambers are short, with flaring apertures. The venter [peripheral area] is 

 elevated and gibbous, the lateral zones more or less gibbous, and the umbilical 

 shoulders tend to project in heavy ridges extending to and modifying the form of 

 the aperture. The dorsum in the young often till a late stage may have no impressed 

 zone. The sutures have broad, shallow ventral lobes, corresponding saddles at the 

 umbilical shoulders, and lobes on the dorsum with small annular lobes. The 

 siphuncle is ventral." 



I think there are few palaeontologists who would not, as I do, regard the differ- 

 ences between Solenocheilus and Syringoceras as of sufficient importance to justify 

 their separation, the only essential character in which they are in agreement being 

 the peripheral situation of the siphuncle. 



That Professor Hyatt had no idea of suppressing Solenocheilus in favour of 

 Syringoceras is shown by his having again introduced it in Eastman's translation of 

 Dr. von Zittel's ' Text-book of Palaeontology ' (p. 525), where he allots it a position in 

 the family Solenocheilidae, along with other allied genera. Syringoceras he places 

 in his family Grypoceratidae, which embraces the two Triassic genera Syringoceras 

 and Grypoceras. 



Dr. von Mojsisovics closes his generic description of Syringoceras by stating that 

 it ranges from the Muschelkalk to the Carinthian stage (beds with Trachyceras 

 Aonoides), but it is obvious that if Solenocheilus were merged in Syringoceras the range 

 of the latter would extend not from the Muschelkalk only, but from the Carboniferous- 



Looking at the matter from another point of view ; even if a fusion of the two 

 genera were justifiable, Solenocheilus having the priority would have to be retained 

 at the expense of Syringoceras. 



Genus Beancoceeas (see ante, p. 131). 

 Beancoceeas Enniskillenense, sp. nov. Plate XLVII, figs. 3 a, b. 



Description. — Shell (? young) discoidal, compressed, unibilicated ; greatest thick- 

 ness at the umbilical margin ; height of outer whorl about three-tenths of the 

 diameter of the shell. Whorls (? number) ; inclusion nearly complete ; umbilicus 

 deep, rather wide, Avith angular margin and very steep sides. Whorl oval in 

 section, apparently a little higher than wide. Periphery broadly rounded in the 

 very young shell (PI. XLVIII, figs. 3 a, b), subangular, with a slight keel, at a 

 more advanced stage of growth (PI. XLVII, fig. 3 a). Sides somewhat flattened 

 around the umbilicus, more rounded in the peripheral region. Extent of the body- 

 chamber unknown. Chambers, known only in the very young shell, rather wide 



