264 Zoological Society : — 



his * Spicilegia,' p. 15, had only ventured to regard as the common 

 L. Maia {Lithodes arctica, Lam., Sieb.). The L. hystrix^ Ilaan, is 

 a beautifully distinct species very thickly covered with sharp spines, 

 named by the Japanese, Jeara-gani, the prickly crab, or Aka-onigani, 

 the Devil's red-crab. 



This list completed the number of the group found in the northern 

 hemisphere, up to the publication of L. {Echidnocerus) ciharms, 

 before alluded to. The species to be described in this paper was 

 found by Mr. Lobb cast ashore after a violent storm on the coast 

 of Cahfornia; and as it has some peculiarities of structure in its 

 legs, antennse, carapace and abdomen, distinguishing it from any 

 other, it may be named Lithodes (Petalocerus), from the beautiful 

 petal-like lobes of the antennae. Before describing it, it may be well 

 to review the species of Lithodes found in the southern hemisphere. 



Messrs. Hombron and Jacquinot, on D'Urville's 'Voyage au 

 Pole Sud,' discovered a fine species which they named Lithodes ant- 

 arctica, pi. 7-8. f. 9, jun. Dana, too, has described and figured 

 this in the * Crustacea of the United States Exploring Expedition,' i. 

 427. pi. 26. f. 15. $ . He found it at Nassau Bay in Fuegia, where 

 he tells us it grows to a very large size ; the exuviae of one, obtained 

 by Mr. Dana, were 8 inches long, and the longest legs were 15 inches 

 in length. He describes the species as abundant in water 6 or 7 feet 

 deep, '* where it is observed to creep along the bottom with sluggish 

 motion ; they have no legs or appendages fitted for swimming. Co- 

 lour, dark cherry-red, the carapace with a slight purplish tinge. The 

 long spines that cover the carapace and legs are longest proportionally 

 in small individuals ; the right hand is much the stoutest, the 

 second basal joint of outer antennae with a single longish spine on 

 the outer side" {loc. cit. i. p. 428). 



We hope that Mr. Despard and his noble band, who are now, or 

 will shortly be, in these seas, will find this and the other, and perhaps 

 new, Fuegian species. Specimens of the young are sometimes found 

 in the stomachs of fishes, as in the case of the half-digested Li- 

 thodes Maia sent to Dr. Leach by the late Dr. Patrick Neill, and 

 now in the British Museum. It would be well to keep some spe- 

 cimens like this. 



Gay in his * Chili ' mentions it (iii. 182) as a native of Chili. 



The Lithodes granulosa, Hombron and Jacquinot, * Voy. au Pole 

 Sud,' pi. 8. f. 15, has the beak scarcely projecting at all beyond the 

 extra-orbital angle ; the carapace and upper parts of its legs are 

 thickly invested, as in some of the CanceridcB, with close strawberry- 

 surfaced granules, closely pressed together. It is a small species, 

 evidently very distinct from Lithodes and more allied to Lomis — it 

 may be called Paralomis granulosa. We have it in the British 

 Museum. The figure in the * Voyage au Pole Sud' is extremely 

 bad, not at all giving correctly the surface of the carapace and legs, 

 which are closely matted with the warts. 



Messrs. Edwards and Lucas have published the description of a 

 fine species, said to come from the Southern Pacific, in the Archives 

 du Museum, ii. 465. pi. 24-27, and given ample details of it. It 



