58 The American Naturalist. [January, 
Fre. 3. Ventral view of the left pes, XI. 
Fic. 4. Ventral view of the right pes, XI. 
Zoological News. INveRTEBRATA.—-Students of American 
forms will find much of interest in Garstang’s “ Fuanistic Notes at 
Plymouth.” Especially interesting are the notes on the synonymy of 
the Medusæ, the existence of budding in the Lucernarians, and the 
notes on the floating fauna, as obtained in the skimming net. 
Ecutnoperms.—A fter a zoological silence of several years, Prof. A. 
E. Verrill takes up the Starfishes and Brittle Stars, describing’ some 
of the species obtained by the U. S. Fish Commission and revising 
some of the previously described forms. Two new sub-families, two 
new genera and 15 new species are characterized; some pertinent 
criticisms are made on some of Sladen’s family characters and a con- 
sistent revision is given of the ossicles commonly called paxille and 
pseudopaxille. 
Worms.—Andrews describes’ some abnormal annelids, in which the 
caudal extremity of the body is forked, supplementing a previous pa- 
per (this journal, p. 725, 1892). The ten cases described agree in that 
in all the main axis of the body and all appendages are duplicated. 
As to the cause of such monsters little definite can be said. It seems 
probable, however, that they may be produced from adults. After 
some remarks on regeneration, Dr. Andrews concludes that “ here we 
may suppose that injuries and other external agents affect the regen- 
erative tissue so that the same cells that else had formed one normal 
terminal now form two more or less separate ones.” 
Crustacea.—C. D. Marsh describes’ two new species of Diaptomus,. 
one from Mississippi, the other from Wisconsin. 
Mr. Edgar J. Allen has just published’ three of the most careful 
pieces of work as yet done on the histology and physiology of the ner- 
vous system of the Crustacea. The work was carried out on the lob- 
ster by means of the Methelyne blue and the rapid Golgi methods. 
Among the points brought out are the recognition of these nerve ele- 
* Journ. Biol. Assoc. United Kingkom, iii, 210, 1894. 
t Proc. U. S. Nat. Mus., xvii, 245, 1894 
s ee Jour. Micros. Sci., xxxvi, 435, 1894. 
. Wise. Acad. Sci. and Arts, x, 1894. 
Som Jour. Micros. Soc., xxxvi, 461, 1894. 
