. The annals and magazine of natural history : zoology, botany, and geology. At my request Mr. Hornell kindly sent me a specimenwhich is certainly well furnished with the tufts of setee, andas certainly is not H. fascigera, Gosse ; it is, in fact, U. gracilis(Heller), a species not hitherto, so far as I know, recordedwest of the Mediterranean. According to Czerniavsky ( Crustacea Decapoda Ponticalittoralia, 1884, p. 15, pi. i.) the rostrum of this species isvery variable. He figures ten or eleven forms in which thenumber of teeth on the upper edge at the base of the rostrumranges from two to f
. The annals and magazine of natural history : zoology, botany, and geology. At my request Mr. Hornell kindly sent me a specimenwhich is certainly well furnished with the tufts of setee, andas certainly is not H. fascigera, Gosse ; it is, in fact, U. gracilis(Heller), a species not hitherto, so far as I know, recordedwest of the Mediterranean. According to Czerniavsky ( Crustacea Decapoda Ponticalittoralia, 1884, p. 15, pi. i.) the rostrum of this species isvery variable. He figures ten or eleven forms in which thenumber of teeth on the upper edge at the base of the rostrumranges from two to five, and those on the almost or quitestraight (sometimes slightly concave) lower edge from one to Ilippolyte fascigera and II. gracilis. 149 four. Mr. Hornells specimen agrees with Czerniavskysfigure M. In an earlier work by the same author ( Materialia adZoogr, Pont, comp. 1868) he figures still more varieties, fordrawings for which I am indebted to Dr. A. M. Norman,, wlio called my attention to the fact that in two ofthem are shown tufts of plumose set*. Fi{r. Fig. 1.—Hijypolyte varians, Leach. vol. iv. 1857, pi. X.)Fig. 2.—Hijypolyte gracilis (Heller) Pontica littoralia, pi. i.) (After Kinahan, Nat. Hist. Review,(After Czerniavsky, Crust. Decap. As it appears therefore (1) that the fascicles or tufts ofsetae are not confined to //. fascigera, and (2) that the otherdistinctive characters relied on by Gosse are of no value, wemay safely conclude that this species should be expungedfrom our lists. There remains the interesting question as to the mode bywhich the tufts are acquired for protective purposes. It is to 150 On nippolytc fascigera and IT. gracilis. be lioped tliat Mr. Gambles researches may throw some lightupon this point. Nant V Glyn, Colwyn Bay,Nov. 28, 1898. The Owens College, Manchester, Nov. 20,1898. Dear Mr. Walker,— I have read the MS. which you have kindly permittedme to see. At Piel the regular hal3itat of fascigera is amongmasses of the polyz
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