558 
DE. CAEPENTEE’S EESEAECHES 0'S THE rOEAArLN-ITEEA. 
interieur presente une organisation qui n’est point cellulee mais tubulee. La couleur 
du tinopore bacule est blanche, flambee et teintee de jaune ; la coquille est entierement 
opaque. L’individu qui a ser^i de sujet a notre description venoit de la mer des Indes 
orientales ; on le trouva dans le sable dont etoit remplie une coquille du genre casque ; 
on rencontre encore les tinopores paiani d’autres coquilles microscopiques, sur les plages 
du golfe Arabique, ainsi que dans quelques eponges de la mer Adriatique. D’une pointe 
a I’autre, le tinopore que nous venons de decrire a deux lignes de diametre.” It is from 
the very distinct statement of De Moxtfoet (borne out by the vertical section rudely 
represented in his figure) of the cellulation of the interior of this organism on different 
planes, so as to give to its vertical section somevrhat the appearance of that of a Xum- 
mulite, that I am induced to believe that he had really distinguished Tinojporus fr-om 
the type to which we now give the designation Calcanna. For, as we have seen, no 
such appearance is presented by vertical sections of Calcanna ; whilst, as will presently 
appear, Tmoporus is made up of several layers of cells superimposed one upon another ; 
and although its relation to Nummulite is really remote, yet the resemblance in aspect 
presented by vertical sections of the two may easily seem, to such as are unacquainted 
with the real meaning of their appearances, sufficiently close to justify the parallel. 
210. I am not aware that any subsequent writer has adopted De Moxtfoet’s generic 
definition of Tinoporus, which seems to have been treated as one of his many valueless 
differentiations which systematists have agreed to disregard. In the ‘ Dictionnaire 
Universel d’Histoire Naturelle ’ it is noticed as a synonym of Calcanna. 
211. The plan of structure presented by Tinoporus differs so remarkably fr-om any 
that has been yet described, as well to deserve being fully detailed. But it presents an 
additional feature of great interest, in the light which it throws upon the structure and 
character of the remarkable fossil genus Orlitoides., which, though finst named by 
M. d’Oebigny, was first described by me*, and is scarcely less important in its geological 
relations than Numniulites itself 
212. Before proceeding, however, to the description of Tinoporus haculatus, I shall 
give an account of the structure of a simpler form of the same type, bv which that 
of T. haculatus will be better understood. The form to which I allude has a much 
wider geographical range ; for though the largest and best developed specimens I have 
seen are those which I have obtained from Mr. Jukes’s Australian dredgings, yet I have 
met with it also in collections from the Fiji Islands, Mazatlan, and the Canaries ; and 
Messrs. Paekee and Bupeet Jokes (by whom this type has been recently noticed under 
what I cannot but consider the inappropriate designation OrhitoUna^) state that it occurs 
also in the East and West Indies, in the Mediterranean, and on the British coast as far 
north as Arran. To this type, which is destitute of the projections so remarkably 
characteristic of T. haculatus, the name of T. lauds may be appropriately given. 
* On the Microscopic Structure of Nwmmtlina, Orlitolites, and Orhitoides, iu the Quai’terly Journal of 
the Geological Society, February, 1850. 
t Annals of Natural History, Series 3. vol. vi. pp. 32, 33. 
