V CRUSTACEA— LITERATURE 411 



known EricMIioid larva) partly to disappear in the 2d period and finally to re- 

 appear in their definitive form. The developmental history of the Loricata shows 

 similar phenomena. The first attempt, later frustrated, to form all or mo.st of the 

 typical Malacostracau extremities, which we here observe is no doubt to be 

 ascribed to the force of heredity. The temporary disappearance of some of the 

 extremities is most probably a phenomenon of adaptation to the special conditions of 

 existence of the larva, so different from those of the adult. If, however, these first 

 fruitless and useless attempts were in the course of time to become gi-adually weaker, 

 and finally entirely cease, then we should meet in the Loricata and Stomatopoda with 

 phenomena quite similar to those in the Braohyuran development, where the 

 formation of the last 5 thoracic segments, and their extremities occurs so extra- 

 ordinarily late. In this way, also perhaps we can explain the fact that the 

 Brachyuran ambulatory feet appear in their definitive form and not as biramose 

 feet. 



Review of the most important Literature. 



Especially recommended as an introduction to the study of the Crustacea. 



T. H. Huxley. The Cray-fish: An introduction to the study of Zoology ("Inter- 

 national Scientific Series," 1884). 



Comprehensive or more general works. 



J. E. V. Boas. Studien uber die Verwandtschaftsbeziehungen der Malacostraken, in 



Gcgenbaur's Morphol. Jahrhucli. 8 Bd. 1883. 

 Justus Carri^re. Die Sehorgane der Thierc, vergleichend-anatomisch dargestellt. 



Miinchen und Leipzig, 1885. 

 C. Claus. Untersuchungeii zur Erfwschimg der genealogischen Grimdlage des 



Orustaceen-systems. Ein Beitrag zur Descendenzlehre. Wien, 1876. Important. 

 The same. Neue Beitrdge zur Morphologie der Crustaceen, in Arb. mis dem Zool. 



Institute zu Wien. 6 Bd. 1886. 

 J. Dana. Crustacea of U. 8. exploring expedition under Capt. Charles Wilkes. 2 



vols, with Atlas. Philadelphia, 1852. 

 H. Gerstaecker. Arthropoden in Bronn's IClassen und Ordnungen des Thierreichs. 



5 Bd. I. Abth. First half 1866-1879. Second half not yet completed. 

 A. Grenacher. Untersuchungen Uber das Sehorgan der Arthropoden. Gottingen, 



1879. 

 Carl Grobben. Die Antenneiulrilse der Crustaceen. Arb, aus clein Zool. Institute zri, 



Wien. 3 Bd. 1880. 

 Milne Edwards. Sistoire naturelle des Crustctcis. Paris, 1834-1840. Vol. III. 



with Atlas. 

 Fritz Miiller. Fiir Darwin. Leipzig, 1864. 



Anatomy of single divisions. 



G. Bellonci. Sistema nerwso e organi clei sensi dello Sphaeroina serratuin, in 



Memorie Aecad. Lincei. Vol. X. 1881. 

 Carl Claus. Neue Beobachtungen iiher Cypridinen. Zeitschrift f. loiss. Zoologie. 



23 Bd. 

 The same. Zur anatomie und Entwickelungsgeschiehte der Copepoden, in Archiv. f. 



Naturgeschichte. 24 Jahrg. 1 Bd. 1858. 

 The same. Beitrdge zur Kenntniss der Entomostraken (Copepoden, Estherien). 



Marburg, 1860. 



