700 



SCIENTIFIC RECORD FOR 1883. 



the animals per se are of general interest ; or, finally, (4^ because they are 

 of special interest to the American naturalist. Of course zoologists 

 cultivating limited fields of research will find in omissions cause for 

 censure, and may urge that discoveries of inferior importance have 

 been noticed to the exclusion of those better entitled to it. It is freely 

 admitted that this charge may even be justly made; but the limits 

 assigned to the record have been much exceeded, and the recorder 

 has studied the needs of the many rather than of the few. The sum- 

 mary is intended, not for the advanced scientific student, but for those 

 who entertain a general interest in zoology or some of the better known 

 classes. 



A very partial bibliography of noteworthy memoirs and works relat- 

 ing to different class of animals is supplied, and will, it is hoped, prove 

 to be of use to those to whom the voluminous bibliographies and rec- 

 ords of progress in science are inaccessible. Instead of being inserted 

 at the head of each class to which the respective memoirs relate, as in 

 the last report, the whole is brought together at the end. 



It has been a difficult matter to select the titles which might be 

 most advantageously introduced in a limited report like the present. 

 Articles of a general interest or of special importance as contributing 

 to throw light on the affinities of certain groups have been given the 

 tirst place. Necessarily many very important papers have not been 

 referred to, and very few descriptive of species have been admitted, and 

 only when unusual interest attaches to the new species or the groups 

 which they enlarge. 



The compiler desires to make special acknowledgment for most mate- 

 rial assistance to the Zoologucher Anzeiger of Professor Carus and to the 

 Journal of the Royal Microscopical Society. 



SYNOPSIS OF ARRANGEMENT. 



I. GENERAL ZOOLOGY. 

 II. PROTOZOANS. 



Sporozoans; Khizopods; Infusorians. 



IIT. PORIFERS. 



Sponges. 



IV. C03LENTERATES. 



Polyps; Acaleps. 



V. ECH1NODERMS. 



Crinoids; Asteroids; Echinoids; Holothuriaus. 



*VI. WORMS. 



Platyhelminths ; Nematelminths; Annelids. 



VII. ARTHROPODS. 



Merostomes; Crustaceans; Arachnids; Insects. 



VIII. MOLLUSCOIDS. 



Brachiopods. 





