Hyatt.] 102 
5. 
far as tlie purity of the language is concerned, I see no leason 
\v]iy they should not do this, since there is no (irreek word to 
which " hypostrophic " couhl he referred that wouhl make con- 
fusion. When no confusion can arise from such a source, why 
siiould not one be at liberty to add an appropriate euphonic 
termination m latinizing a Greek word, if it is otherwise 
suitable ? 
While desirous of observing all reasonable regulations, such 
iron-bound shackles upon the framing of nomenclature are not 
beneficial and should be met by sturdy opposition. They involve 
a question of principle which is Avorthy of serious consideration. 
While it may be conceded that terms which are inappropriate in 
composition, like nealogic, etc., should be changed, this does not 
justify the substitution of entirely new names ^for these, nor upon 
the same principles ought a word having a termination unjustified 
by ordinary rules of etymology to be supplanted b}' another 
entirely new term. The logical outcome of this practice would be 
the substitution of some other word for " embryonic," a change 
delightful to the linguist, no doubt, but confusing to the student. 
It seems to me, therefore, that there is no valid reason for the 
abandonment of nepionic, audit is consequently used in this paper 
to designate the first part of the true conch as distinguished 
fi-om the protoconch or last of the embryonic stages. 
Those who do not believe that there was a protoconch in nauti- 
loids will have to reconstruct this part of the nomenclature in 
accordance with their own views. Having been reproached by 
Professor Blake in his address before the Geologists' association in 
1892 in London, for holding to this opinion, it is necessary for me 
to add that there is much new evidence with regard to the 
existence of the protoconchs .and of the cicatrix in nautiloids, and 
I maintain my former views, because facts in its favoi- are steadily 
accumidating. 
Granting, therefore, that the conch begins with the nepionic 
stage, I propose to call the first substage of this period the anane- 
])ionic substage. This substage is very similar throughout all the 
nautiloids on account of the existence of the cicatrix on the point 
of the apex of the conch and the surrounding comparatively 
smooth area which is generally elliptical, the apex being in most 
forms of Nautiloidea cup-like and in section a laterally compressed 
(■lli)>se, the vertical or ventro-dorsal diameter being the longest. 
