ANOMOURA LITHODEA. 427 



In Lomis, the beak is nearly rudimentary, the surface is tomentose, 

 and the fifth joint of the outer maxillipeds, acccording to De Haan,* 

 very broad (twice as broad as the fourth). 



Lithodes has a distinct spinigerous beak, a spinous or verrucose 

 carapax, and the fifth joint of the outer maxillipeds oblong and seldom 

 wider than the fourth. 



The genus Echinocems of A. White, was proposed for a species from 

 the Columbia River. From the description he has given,^ we are 

 unable to determine in what generic characters it differs from 

 Lithodes. 



GENUS LITHODES. 

 The species of Lithodes hitherto described are the following : 



1. L. Maia, figured by Pontoppidan, Hist. Nat. de la Norwege, ii. pi. 25; Cancer 

 maja of Linnaeus, Herbst ; L. Maia of Leach ; L. arctica of Lamarck, Edwards 

 (ii. 186), &c. 



2. L. Camschatica of Tilesius and De Haan (Faun. Japon., 217, pi. 47). 



3. L. hystrix, De Haan (Faun. Japon., 218, pi. 48); L. arctica of Siebold (Spici- 

 legia, Faun. Japon., 15). 



4. L. antarctica, Hombron and Jacquinot (Voy. au Pole Sud, pi. 7). 



5. L. granulosa, Hombron and Jacquinot (ibid., pi. 8, f. 15). 



6. L. brevipes, Edwards and Lucas (Arch, du Mus. d'Hist. Nat., ii. 463, pi. 

 24-27). 



The first three are from the northern seas ; the last three from the 

 southern. To these we add the L. verrucosa, another Fuegian species. 



LITHODES ANTARCTICA, Hombron and Jacquinot. 

 Nassau Bay, Fuegia. 



Plate 26, fig. 15, represents the abdomen of a large female, natural 

 size. 



The species grows to a very large size ; specimens are often five inches 



* Faun. Japon., p. 215, pi. Q, and pi. 48, f. 2, Lomis dentata, De Haan. 

 | Ann. Mag. Nat. Hist. [2], iii. 225. 



