274 Rev. Canon A. M. Norman on Bathynectes. 



1. Bathynectes superba (O. G. Costa). 



Portunus superbus, O. G. Costa, Fauna del Regno di Napoli, Addizi- 

 oni a i Decapodi Brachyuri, p. 19, pi. vii. * 



1871. Bathynectes lonyispina, Stimpson, Prelim. Rep. Crust. Gulf- 

 stream, Bull. Soc. Comp. Zool. vol. ii. p. 146 (S). 



1871. Bathynectes brevispina, id. ibid. p. 147 ( $ ). 



1877. Thranites velox, Bovallius, (Ef vers, af Kongl. Vet. Akad. Forhandl. 

 1876, no. 9, p. 59, pis. xiv., xv. 



1879. Bathynectes lonyispina, A. Milne-Edwards, Crust. Reg. Mexi- 

 caine, p. 234, pi. xlii. fig. 1 (c? junior). 



1879. Bathynectes brevispina, id. ibid. p. 235 ($ adult). 



1881. Thranites velox, Bovallius, he. cit. 1881, no. 2, p. 9, pi. ii. 



1882. Bathynectes lonyispina, A. Milne-Edwards, Institut de France, 

 Comptes rendus sommaire d'un explor. zool. faite dans l'Atlantique 

 a bord du navire ' Le Travailleur,' p. 10. 



1883. Bathynectes lonyispina, S. I. Smith, Proc. U. S. Nat. Mus. vol. vi. 

 no. 2, p. 17. 



1885. Portunus superbus, Cams, Prod. Faun. Medit. vol. i. p. 517. 



1886. Thranites velox, G. O. Sars, Den Norske Nordhavs Exped. xv., 

 Zool. Crust, ii. p. 1. 



1890. Bathynectes lonyispina, G. C. Bourne, Journ. Marine Biol. Assoc. 

 United Kingdom, vol. i. p. 314 (name only). 



Frontal margin divided in the young into three lobes, the 

 outer blunt, the median emarginate ; in adult the median is 

 divided into two distinctly separated processes, and all four 

 at that age become pointed. First and second antero-lateral 

 teeth less acute than the third and fourth ; the fifth greatly 

 developed, long, cylindrical, and acute, and (like the cara- 

 pace) scabrous ; this spine-like process is often three times as 

 long as the fourth tooth. The chelipedes have the meros 

 furnished with two teeth on the inner margin at a little more 

 than half of its length, one of these teeth being situated on 

 the upper and the other on the lower edge : carpus distally 

 produced on the inner side into a large and very acute falcate 

 process, which itself is armed with three acute teeth ; on the 

 back of the carpus are two well-developed teeth and many 

 smaller tuberculiform processes : hand with six carina?, the 

 first or inner and second crowned with tubercles, and the first 

 also terminating in a large acute tooth ; third not elevated, 

 formed by a series of small tubercles ; fourth and fifth are 

 ribs, which are not usually tuberculated ; sixth faintly 

 marked, passing down the middle of the inferior surface and 

 running out to the end of the thumb. The carapace is sub- 

 hexagonal and its surface is granulated ; a well-marked ridge 



* Unfortunately tbere is no means of determining the dates of publi- 

 cation of the parts of the 'Fauna del Regno di Napoli ;' but the publi- 

 cation at any rate precedes that of Stimpson by fifteen or twenty years. 



