288 THE VOYAGE OF H.M.S. CHALLENGER. 



these numerous species briefly described and unfigured. The expression, " posterior caudal 

 stylets with short rami, the outer ones uniform, the inner minute, spine-like," though not 

 very intelligible, does not seem to suit either the genus Gerapus or the genus Namia which 

 are suggested by Spence Bate as alternatives for the reception of the species. Amphithoe 

 filigera, Gammarus flahellifer, Gamraarus tenuiecyrnis, Leucothoe stylifera have not so far as 

 I know been subjected to criticism or re-examination. AUorchestes ruhricornis, AUorehestes 

 pmicUlafa, and AUorchestes japonica, in none of which is the telson described, will, I 

 suppose, until further knowledge stand in the genus Ilijale. Orchestia pollicifera is trans- 

 ferred by Spence Bate to Talm-clieatia, as the description shows that in this species the male 

 is of the Orchestia-, the female of the Talitrus-, form. The next species described is 

 Corophium eonfractum, and the two last are Gaprella lurfator' and Capjrella gracilis, which 

 from the brief descriptions Mayer finds absolutely impossible to determine. Future 

 investigation in the same locality may perhaps settle what species Stimpson meant by 

 Gaprella lucfator with its second gnathopods " large, tridentate below, teeth unequal," and 

 by Gaprella gracilis "with a slender curved rostrum." 



1855. Stimpson, William. 



or 1856? 



Description of some new Marine Invertebrata. By Wm. Stimpson, Zoologist to 

 the U.S. Surveying Expedition to North Pacific, Japan Seas, etc., under direction 

 of Commander C. Einggold, U.S.N. [From the Proceedings of the Academy of 

 Natural Sciences, July, 1855.] Vol. VII. 1854-5. Philadelphia. 1856. 



Under the heading Choristoj^oda are given four new species of Anthura. After these comes 

 Gaprella soJitaria, which Mayer pronounces absolutely unrecognisable ; Iphimedia obesa, 

 named apparently in ignorance of Eathke's species, and renamed "Iphimedia Stimpsoni" in 

 the British Museum Catalogue, p. 374. Mr. Haswell in his Australian Catalogue gives 

 Iphimedia ? amhujuu, but does not mention Stimpson's species, which was taken also at 

 Port Jackson. Mr. HasweU does not specify reasons for doubting the genus of his species. 

 There is more obvious reason for hesitating to keep Stimpson's species in Eathke's genus 

 as he speaks of the gnathopods having "equal subcheliform hands of moderate size," 

 whereas in species of Ipliimedia (Eathke, not Dana) they are generally very 

 small. 



(Edicerus fossor is described at some length. It was taken at Botany Bay. Mr. Haswell 

 considers that his own species (Edicenis arenicola from Shark Island, Port Jackson, may 

 be identical with it. Gammarus ruhro-maadatus from Port Jackson, referred to the genus 

 Mnera by Mr. Haswell, is now considered by that author to cover his own species Mwra 

 sptinosa and Mmra ramsayi, and Mr. Chilton's Mara J'esliva. Difi'erences in the form of 

 the second gnathopods had been the chief ground of distinction, but he finds " on examining 

 a series of specimens, a perfect series of gradations in this respect from the form figured by 

 Stimpson to typical forms of M. sjnnosa and 31. Ranisai/i." Tliere are no references to any 

 figure of Stimpson's species either in Mr. Haswell's own works or in the British Museum 

 Catalogue or in the copy of Mr. Stimpson's work kindly lent me by Mr. Spence 

 Bate. 



Leucothoe affimis, from False Bay, Cape of Good Hope, will be difiicult to distinguish from its 

 immediate relations. Anonyx variegatus from Simon's Bay, Cape of Good Hope, has been 

 taken again in the same locality by the Challenger Expedition. It is re-described as 

 Li/sianassa variegata in the Brit. Mus. Catalogue. 



