ON CRUSTACEA BROUGHT BY DR WILLEY FROM THE SOUTH SEAS. G09 



below, which belongs to the Scyllarid group, with the second antennae broad in adult 

 and young. Mr Borradaile's report mentions Scyllarus sieboldi, de Haan, and Parihacus 

 antarcticus (Rumph), as obtained by Dr Willey, but these were from Lifu, Loyalty 

 Islands. Leach, who is known to be the author of appendix iv. to Tuckey's Narrative, 

 though his name is not expressly appended to it, introduces four species of Phyllosoma, 

 brevicoriie, laticorne, commune, and clavicorne, with distinguishing figures on plate 12. 

 He begins his account with the words, ' Phyllosoma, the most curious genus of Crustacea 

 that has yet been discovered.' Familiarity may lessen the curiosity of it, and the 

 o'eneric name is likely to disappear, when all the problems of affinity between these 

 larval forms and their parents have been solved. But the beauty of structure remains 

 exceptional, even now that many parallels are known to the otherwise amazing contrast 

 between the young and adult stages of an individual life. 



Phyllosoma duperreyi, Gu^rin. 



1833. Phyllosoma Duperreyi, Guerin, Magasin de zool., cl. 7 (unpaged), pi. 12. 

 1837. PJiyllosonia Duperreyi, Milne-Edwards, Hist. Nat. Crust., vol. 2, p. 485. 

 1S3S. Phyllosoma Duperreyi, Guerin-Meneville, Voy. de la Coquille, p. 40, pi. .5, 



fig- 2. 



1873. Pityllosoma Duperreyi, Richters, Die Phyllosomen, p. 17, in Zeitschr. wiss. 

 Zool, vol. 23, pi. 33, fig. 3. 



It should be noticed that both Guerin (later Guerin-Meneville) in 1833 and Milne- 

 Edwards in 1837 give references to a work which itself contains a preface dated 1838, 

 Guerin citing " Voyage de Duperrey, Zool. t. II, p. 2, p. 46 ; pi. 5, fig. 2," and Milne- 

 Edwards citing " Voyage de la Coquille, Crust. PI. b, fig. 2." The explanation may 

 be that the plates were published before the text of Duperrey's voyage, and that 

 Guerin had in his hands the printed text of his report long before it was published. 

 The specimen he described and figured was taken at Port Jackson, and measured more 

 than 40 mm. in length by 30 mm. in breadth. Dr Willey 's specimen, from Milne Bay, 

 New Guinea, is 22 mm. long by 13 mm. wide. The specimen of another species, which 

 Guerin figures as Phylloso7na laticorne, Leach, is represented as three inches long by 

 nearly two inches wide, with a span between the extremities of its slender legs, when 

 the longest are fully extended, of twelve or thirteen inches. 



SYMPODA. 



1846. Cumacea, Kroyer, Naturhistorisk Tidsskrift, Ser. 2, vol. 2, ]). 203. 



186."). Cumacea, G. 0. Sars, Vid.-Selsk. Forh. for 1864, Extract, pp. 1—83. 



1893. Cumacea, Stebbing, History of Crustacea, Internat. Sci. Ser., vol. 74, pp. 8, 291. 



1899. Cumacea, Sars, Crustacea of Norway, vol. 3, p. 1. 



Since the important essay by Sars in 180-5 Kroyer's name for this order has been 

 accepted without denuir in a very large number of writings on the subject down to 

 the present date. Of all these works the most imjiortant is the third volume of the 



