275 
quite rudimentary, and the last highly developed, as shown 
in the accompanying figure. 
Although I had previously communicated researches on 
the anatomy of the Heteropoda to the Royal Society of Edin- 
burgh, I had altogether overlooked the buccal teeth of Firola ; 
and now I am quite sure that further investigation will 
reveal similar organs in the other genera of the order. 
References to the figure which represents the upper and 
lateral parts of the mouth, with the inner surface turned 
upwards after the removal of the tongue and buccal mass, 
improperly so called. 
a. The upper lip. 68. The roof of the mouth. ec. The 
left row of buccal teeth. d. The right row of ditto. e. Ciso- 
phageal ruge. 
The Nature of Connective Tissur. By Dr. W. Krauss, 
Professor in Gottingen.1 
Ir is usual to distinguish as the fundamental types of con- 
nective tissue two modifications, the ordinary fibrous or 
homogeneous and the reticulated. The former is usually 
regarded as consisting of a distinctly or indistinctly fibrillated 
intercellular substance, and variously formed cells, the con- 
nective-tissue corpuscles, imbedded therein; and these are 
described sometimes as stellate, sometimes as spindle-shaped 
or roundish, sometimes angular and flat. MReticular or 
areolar connective tissue is composed of anastomosing stellate 
cells (connective-tissue corpuscles), in the interstices of which 
is contained fluid with suspended lymph corpuscles. 
There would thus be two varieties of connective tissue, the 
essential difference between which would be that in the 
former the intercellular substance is solid or fibrous, in the 
latter fluid. This distinction does not, however, exhaust the 
molecular arrangements which are ascribed to the connective 
tissue. A third state of molecular aggregation, certainly not 
known in the other sciences, is recognised under the name 
of semi-solid (festweich), and a fundamental substance of 
this kind is ascribed to the homogeneous or gelatinous con- 
nective tissue, which is supposed to be connected by transi- 
tional forms with the solid or fibrous. 
It is obvious, then, that there is only one morphological 
attribute common to all modifications of the so-called con- 
' Translated from ‘ Deutsche Klinik,’ May 20th, 1871, by J. F. Payne. 
