19S 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
abdominal, and apodal Cirripedia, and by the Rhizocephala. The re- 
lationship may be shown by the following table : — 
Cirripedia (sens, strict.) 
Ascotlioracida (forms resembling the Cypris- stage) 
Ostracoda . . . Protostraca Copepoda 
i 
Phyllopoda 
On the descriptions and criticisms of the author Prof. H. de Lacaze- 
Duthiers * makes a few remarks. Though denying the name of liver 
to the large yellow arborescent canals which are connected with the 
digestive tube, the Roumanian naturalist allows their connection and 
offers no suggestion as to the function of the parts. What the French 
anatomist has to say in favour of calling them glands and liver, applies, 
indeed, to other animals besides Laura Gerardise : “ Cette categorie de 
glandes digestives, que nous gratifions du nom de foie sans autre raison 
plausible que leur ouverture dans le tube digestif, et par une habitude 
qu’il est et sera encore longtemps difficile de faire perdre aux anato- 
mistes.” 
Thoracic Legs of Triarthrus.f — Mr. C. E. Beecher gives some pre- 
liminary details as to the structure of the thoracic legs of this Trilobite. 
Enough has been seen to make it evident that the relations of the 
Trilobites are with the Entomostraca and Malacostraca. Like the Lepto- 
straca they probably constitute an intermediate type having affinities 
with the Entomostraca chiefly in the irregular segmentation, and with 
the lower forms of the Malacostraca (such as Schizopoda, Cumacea and 
Anisopoda) in the detailed structure of the limbs. 
Vermes, 
a. Annelida- 
Supporting Tissues of Nervous System of Chsetopoda4 — Herr E. 
Wawrzik finds that in the lowest Chaetopoda the supporting tissue which 
encloses the nervous elements is connected with the subcuticle for the 
whole length and breadth of the ventral cord. In the higher forms it 
is connected only by cords, which arise from the tissue around the 
ganglionic cells. In the highest and in all Oligochseta it is completely 
cut off from the subcuticle except in the tail. The supporting tissue is 
to be regarded as a product of the subcuticle, and is comparable to the 
neuroglia of Vertebrates; it does not only enclose, it also penetrates, 
the nervous elements. 
Tubes formed by Annelids.§ — Prof. W. C. MTntosh has an 
interesting article on the homes of Annelids. He remarks that no 
basket-insect’s work is more ingenious, and even the combs of Bees and 
Wasps, or the nests of the most skilful birds are not more complex 
* Arch. Zool. Exper., i. (1893) pp. xix.-xx. 
t Amer. Journ. Sci., xlvi. (1893) pp. 467-70 (3 figs.). 
i Schneider’s Zool. Beitrage, iii. (1892) pp. 107-27 (6 pis.). See Zool. Jahresber. 
for 1892 (1893) Vermes, p. 63. 
§ Ann. and Mag. Nat. Hist., xiii. (1894) pp. 1-18 (8 figs.). 
