I02I.] S. Kemp & B. Chopra : Stomalopoda. 309 



Gonodactylus oerstedi, Hansen. 



1895. Goiiotiactyl IIS oerstcdii. Hansen, hop.Cumac. Stvntntup. tier Pliiiik- 



tou-Exped. p. 65 (footnote). 

 1902, Gonodactylus oersfedii, Bigelow, Bull. U. S. Fish Comm.for iQOn, 



XX, ii, p. T52, figs. 1, 2. 



1920. Gonodactylus oerstedii, Ratlibuii., Rapp. Vissch. en Indiistr. Zee- 



prodt'ci. in Curacao, Ji'tg. d. Prof. J. Boeke II, p. 32 (of re- 

 print) . 



Through the kindness of Prof. Ch. Giavier we have been able 

 to examine a series of specimens of this species obtained by M. 

 Diguet in the Gulf of California and belonging to the Paris Museum. 

 The sample we have examined, which is only part of a inuch 

 larger collection of specimens belonging to the same species, is 

 labelled " Espiritu Sancto, Chalut, 15-25 m." 



That these specimens from the Pacific Coast should prove to 

 belong to G. oerstedi is verj' remarkable, but except for ver j^ young 

 individuals less than 20 mm. in length, all exhibit the additional 

 keel on the inner side of the intermediate teeth of the telson which 

 is the sole discritninating character between G. oeysledi and G. cliira- 

 gra. We have made a close comparison between the Californian 

 specimens and others from Fernando Noronha and St. Thomas in 

 the W. Indies and are unable to find any appreciable difference 

 between them. 



So far as we are aware the only previous records of a Gonodac- 

 tylus belonging to the G. chiragra group from the Pacific Coast of 

 America are those of Miers ' from Panama and of Nobili '^ from the 

 Gulf of St. Miguel in Darien. Both authors referred their speci- 

 mens to Ct. cliiragra, but Miers record was made long before the 

 distinctive characters of G. oerstedi were known and Nobili's so soon 

 after the publication of Hansen's paper that it is probable that he 

 had not consulted the work. 



Goiivdactylus oerstedi has hitherto been found only in the 

 Atlantic and, so far as is known, does not live in the southern parts 

 of that ocean; Miss Rathbuu in a recent paper gives its distribu- 

 tion as "North Carolina to Brazil, Bermudas." The occurrence 

 of the species hi the Gulf of California is thus most unexpected 

 and points to the conclusion that its distribution is discontinuous. 

 The species of Gonodactylus inhabit the warmer waters of the globe 

 and, apart from the absence of anj' records, it is extremely improb- 

 able that G. oerstedi extends along both east and west coasts of ' 

 S. America and round Cape Horn. 



Gonodactylus dcmani, Henderson. 



1913. Gonodactylus dcmani. Kemp. loc. cit.. pp. 164, iy8, pi. ix, figs. 

 108-111. 



1921. Gonodactylus demani, Tattersall, Jottrn. Linn. Soc. ZooL. 



XXXI V, p. 359. 



In 1913 (loc. cit., p. 198) it was jDointed out that in specimens 

 of this species from the northern end of the Gulf of Manaar and 



' Miers, Ann. Mag. Nat. Hist. (5), \\ p. 119 (iJ 



2 Xobili. Boll. .Mus. Zool. Torino XII, N'o. 280, p. 6 (1897). 



