98 Proceedings of the Royal Physical Society. 
bone. Between the two processes of the palate bone is the spheno-palatir.e 
foramen, completed above by the inferior portion of the sphenoidal spongy 
bone, e. The superior portion of the sphenoidal spongy bone. 
Fig. 3. Another view taken from the same specimen : a, h, c, The parts of 
the inferior margin of the vomer for articulation with the palate, maxillary, 
and intermaxillary bones respectively ; d, inferior aspect of the sphenoidal 
spongy bone ; e, orbital plate of the ethmoid seen in perspective ; /, inferior 
turbinated process of the ethmoid. 
Fig. 4. Illustrates the articulations of the vomer in the rabbit. Above are 
the vomer and ethmoid forming one bone. Beneath are the bones of the upper 
jaw of the left side, and a portion of the intermaxillary bone of the right side 
adhering to it. a, Anterior extremity of the vomer, grooved for the cartila- 
ginous septum of the nose; b, the part of the vomer which articulates with c, 
the extremity of the expanded mesial processes of the intermaxillary bones, 
forming turbinations in connection with Jacobson's organ. 
VI. On the Discovery of NuUipores [Calcareous plants) and Sponges in 
the Boulder Clay of Caithness. By Charles W. Peach, Esq., 
Wick. (Specimens were exhibited.) 
In a paper read to the Society in March 1855, " On the 
Calcareous Zoophytes of the Boulder Clay of Caithness," I 
intimated that, at a future time, it was my intention to give 
you one on the flora of that formation. I have delayed from 
time to time, that I might search in wide localities, and thus 
have succeeded in procuring several specimens at Wick, and 
the burns of Haster and Freswick.* Mr Cleghorn has also 
found specimens at Wick, and Mr Dick in and around Thurso. 
Although pretty widely distributed in the country, nowhere is 
it found in abundance. At times it is quite soft when first 
taken out of the clay ; it hardens on exposure, and cracks in 
the drying, and then, should an attempt be made to make a 
section, it crumbles to pieces. In one taken from the clay on 
the side of Wick harbour I got a pretty good slice, and have 
made out under the microscope the cellular structure ; it agrees 
with that of the Melohesia polymorjjha of Harvey, as may be 
seen by the specimen herewith sent, mounted in Canada bal- 
sam, and a specimen on stone, also from Wick. In one spe- 
cimen, I noticed, as well as the spreading base, the papillary 
eminences peculiar to this species ; and in another the indenta- 
tions made by saxicavous creatures. When passing Freswick 
* Since this paper was read I got, on the 18th May (Queen's Birth day) 
I860), splendid specimens in the Burn of Strath, near Watten. 
