1 8 8 2 .] Recent Literature. 3 9 1 



a group of fishes of whose development almost nothing is known, 

 and a detailed account of its embryology would have an interest 

 and importance only excelled among the vertebrates by that of 

 Ceratodus. The gar pike's development has only been studied by 

 Mr. Agassiz, and his observations are very incomplete, though 

 very important. A study of the development of any of the Amiu- 

 ridce (cat fish and horned pouts) would be very interesting and in- 

 structive, and would amply repay the person who will undertake 

 it, while the man who investigates the method of growth of Myx- 

 itte, so common at Eastport, will have an entirely unexplored field 

 to himself. 



The problems which we have stated are almost entirely em- 

 bryological, and it is in this line of development that the most 

 important results are to be reached. A future article will present 

 more of the anatomical side. 



RECENT LITERATURE. 



The Zoological Record for 1880. 1 — This volume, the seven- 

 teenth of the series, has appeared with commendable promptness, 

 and Mr. Rye, the editor, assures us that this rate of issue will 

 henceforth be maintained. The recorders of the different depart- 

 ments are nearly the same as in the preceding volume. 



It appears that the number of new genera and sub-genera con- 

 tained in the present volume is 1008, as against 976 of Vol. XVI 

 (which contained sixty new genera of Arachnida, properly be- 

 longing to Vol. xv, from which that group had been omitted). 

 These are divided as follows: Mammalia, 34; Aves, 16; Reptilia, 

 216; Pisces, 31; Mollusca and Molluscoida, 79; Crustacea, 80; 

 Arachnida, 78 ; Myriopoda, 2; Insecta, 438 ; Vermes, 28 ; Echin- 

 odermata, 24; Coelenterata, 70 ; Spongida, 51 ; and Protozoa, 56. 



The number of pages is about the same as in the preceding 

 volume. On p. 3, Myriopoda, we notice an important error. Mr. 

 Ryder's order Symphyla is spelled Symp/w/a,the name not being 

 repeated in the note under the heading thus misspelled. 



This record is of the greatest service to the systematic zoolo- 

 gist, and to none more than those who are unfortunate enough not 

 Hence the American zoolo- 

 » other works. 

 of Borneo. 2 — In Vol. xvi of the Annals of 

 of Natural History, D. Vinciguerra com- 



