5A QUARTERLY CHRONICLE. 
trated paper appears on this subject. The author has chiefly 
studied the disposition of the generative organs, and his 
results are thus summed up at the conclusion of his paper: 
1. The sata casa koe of the B. /atus is a simple cellular 
matrix. 
2. The outermost covering of the surface of the body is 
composed of a structureless cuticle. 
3. The elements of the muscles are spindled-shaped, like 
the type of the so-called smooth muscles of vertebrata com- 
posed of cells. They are disposed in three bundles, and 
form, a, a series of circular or ring-muscles; 5, a series of 
long muscles; ¢, isolated oblique muscles. 
4. The B. latus has a genital-pore. 
5. The male organs consist of, a, the testes situated at 
the side of the rings; 6, of the united excretory tube of all 
the testes, the seminal duct, which passes into, c, a muscular 
sac, of which the anterior end bent upon itself exposes, 
d, the penis, which discharges the function of a genital- 
pore. 
6. The female organs are, a, a tough vaginal canal dis- 
charging into the genital-pore below the muscular sac; 0, a 
tough, u-shaped ovary, placed under the muscles on the central 
surface; c, yelk-sacs and yelk-ducts are disposed over much 
of the integument of the side of each ring, and joining with 
one another, take the form of a corn sheaf—from these a 
system of canals arises in the middle of the rmg; d, the 
excretory duct of the ovary receives the yelk-duct, which meets 
itin the middle, besides a canal coming from the end of the 
vagina; e, the uterus, or egg-holder, is a canal folded up in 
many loops, which possesses an independent opening beneath 
the genital-pore; f, the junction between the beginning of the 
uterime canal (Knauel rohre) and the end of the ovarian 
duct takes place at an enlargement of the latter (Knauel 
driise.) 
Note on the Termination of Motor Nerves among the Crustacea 
and Insects. By M. Cu. Roverr.—In his last note on 
the termination of motor nerves, Kuhne, the author states, 
seeks to establish a similarity between the mode of termi- 
nation of the nerves among the Articulata (long since 
described by Doyere) and that which he (M. Rouget) 
discovered in the superior Vertebrata; an assimilation which 
is by no means in accordance with the facts. Cancer 
menas, articus, larve of the Diptera, and Coleoptera, were: 
the subjects of M. Rouget’s examination. He finds that 
the cone described by Doy ere and Quatrefages really exists, 
but is not the ¢ermination of the nerve. The form and appear- 
