Mr. A. White on a new Species q/" Lithodes. 307 



attended with so much expense, and such great inconveniences of all 

 kinds. Although the Portuguese Government allow me ^645 |)er 

 month, I shall nevertheless be under the necessity of contracting 

 heavy debts before I return to Europe, since everything is at least 

 three times dearer here than in London. As there are few roads, 

 and fewer beasts of burden, all baggage, provisions, water, presses, 

 paper, beds, cooking utensils, with the necessary articles for barter 

 (<?. g. guns, powder, brandy, cotton goods, glass-pearls, &c.), must be 

 conveyed on the heads of negros ; so that even the shortest excursion 

 of three or four days costs an enormous sum. 



Meanwhile my reliance is upon England ; that is to say, I anti- 

 cipate that my cases of living plants, insects, seeds, &c., as also a 

 few herbaria of the flora of this neighbourhood, will be duly 

 honoured ; and in that hope, I intend within two or three weeks 

 from this time, to make up a sample-collection for London. About 

 the 16th or 18th of the present month, the English ship of war 

 Penelope will leave here for England, and I shall avail myself of this 

 opportunity to send living plants, as well as seeds and Hymenoptera, 

 to Messrs. Wilson Saunders, Hooker, &c. 



Read also a paper " On a new species of Anomourous Crustacean 

 belonging to the family HomoUdte, found by Mr. Wm. Lobb, at 

 Monterey in California, in the winter of 1850." By Adam White, 

 Esq., F.L.S. &c. 



This species Mr. White stated to be in some respects allied to 

 Lithodes {Echinocerus) cibarius from the Columbia River, but to 

 differ from it in the more regularly triangular and depressed form of 

 the carapace, and in the outer antennee having two or three beautiful 

 petaloid processes at the base, instead of the strong thorn-like spines 

 at the base of the other. The abdomen is singularly pitted on the 

 under side ; the surface of the carapace is covered with strawberry- 

 like tubercles, and the thick spines with which the legs are covered 

 are similarly ornamented. The most singular character however is 

 the absence of the hinder pair of legs, or (as the President suggested) 

 their apparent absence, there being no hole between the carapace 

 and abdomen through which these appendages could come. 



Mr. White gave a revision of the species of Lithodes, which had 

 been much added to, since the work of Prof. Milne-Edwards, by a 

 Japanese species described by De Haan ; three species from Fuegia, 

 obtained on the voyage of Dumont D'L^rville ; one described by 

 Edwards and Lucas ; another by Dana ; and another by Mr. White 

 himself. He proposed for the fine species obtained by Mr. Lobb, the 

 name of Lithodes (Petalocerus) Bellianus, in compliment to the Pre- 

 sident of the Society. 



Read also a Memoir " On the External Membrane of the Unim- 

 pregnated and Impregnated Ova of the Common Salmon." By John 

 Hogg, Esq., M.A., F.R.S., F.L.S. &c. 



In illustration of his paper, Mr. Hogg presented to the Society 

 two phials containing (preserved in spirit) mature ova as they fell 

 from the female Salmon unimpregnated, and others taken at the same 



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