568 THE VOYAGE OF H.M.S. CHALLENGEIl. 



present tlie generic subdivision proposed by Boeck, though, in my judgment, a closer 

 revision of the family will show the need of slightly reducing the number of genera." 

 31. Socarnes hidenficulatus, Sp. Bate, with the synonymy, " Lijsiananna hidenticulaia, Sp. 

 Bate, Ann. iV Mag. Xat. Hist., Ser. 3, Vol. 1, p. 362. Lijsianassa nugau; Sp. Bate, Cat. 

 Amphip. Brit. Mus. p. 65. PI. x. fig. 3 (non Phipps). Lijsianassa Valilii, Goes, Crust. 

 Ampliip. Spitsb. K'o. 2 (ex parte). Anonijj: hidentiruhitwt, Miers, Spitsb. Crust. Ann. 

 & Mag. Is^at. Hist., 1877. p. 136," distinguished from the closely allied Anonijx vahlii, 

 to which Goes has referred it, by the bidenticulate lateral plates of the third abdominal 

 segment; Gen. 2. Hi'ppomedcm, Boeck, 1870. 32. Hippontedo7i liolhiiJU (Kr0yer), var., 

 with the synonym, " Hippomedon abyss!, G. O. Sars, Prodromus desci iptionis Crust., etc., 

 No. 9-i (non Goes)," a variety without eyes. Gen. 3. Anonyx, Krtiyer, 1883 [1838]. 

 33. A)i07i>jx calrarafus, " Anoni/x {Ilippoinedon) cdlcaraliis, G. 0. Sars, Crust. & 

 Pycnogonida nova etc., No 16." "Of the previously known Anonyx species, it un- 

 questionably approximates closest A. pumilus Lilljeborg, but is easily recognized by the 

 much more produced posterior lateral corners on the 3rd abdominal segment, as also the 

 peculiar spur like projection on the basal joint of the last pair of legs, a character that 

 suggested the specific designation. In the imperfect subcheliform structure of the 1st 

 pair of legs, it differs from all other known species of the genus, agreeing in this respect 

 rather with the genera Lysianassa and Socarnes." 34. Anonyx typldops, carinate on the 

 fourth abdominal segment, totally devoid of eyes. Gen. 4. Onidmus, Boeck, 1870, in the 

 table of contents and index spelt Oncsimus. 35. Onidmus tiirgidns, " Anonyx (Onisimus) 

 turgidus, G. 0. Sars, Crust, ct Pycnogonida nova etc., No 13," "approximates closest 

 0. Edn-arddi Kroyer, from which however it may at once be distinguished by the 

 remarkably clumsy and inflated form of body, a character that gives the animal greater 

 resemblance to 0. plaidus Kroyer, which, in other respects, however, differs very 

 decidedly." 35. Oidsinms Jeucopis, "Anonyx {Onisimus) leucopis, G. O. Sars, Crust. & 

 Pycnogonida nova etc., No. 14," distinguished by "the imperfect development of the 

 eyes and the shape of the telson," which is "very faintly emarginate at extremity." 

 Gen. 5. Tryphosa, Boeck, 1870. 37. Tryplwsa imsilla, "Anonyx {Ti-ypilwsi.i) pusiUa, 

 G. 0. Sars, Crust. & Pycuog. nova etc., No. 15." "The present species I refer here to 

 Boeck's genus Trypiliosa. In my judgment, however, both this genus and the genera 

 Onidmus and Oirhomene should, perhaps, more properly be eliminated and their species 

 ranged under the genus Anonyx. From the other forms referred by Boeck to the genus 

 Tryphosa, the present species may be recognised by the total absence of eyes, the remark- 

 ably slender secondary flagellum on the 1st pair of antenns, and the form of the head." 

 Gen. 6. Acidosfoma, Lilljeborg, 1865. 38. Aeidostmna laticorne, "from the only hitherto 

 known species of this genus, viz. A. ohesum Sp. Bate, the present is easily distinguished 

 by the total absence of eyes, the prodigiously develoj)ed 1st pair of antennne, and the 

 remarkably robust 3 posterior pairs of legs. Moreover, in the rudimentary character of 

 the last pair of caudal stylets, as also the posteriorly non-incised telson, this species differs 

 essentially from the typical form." 

 Fam. 2. Phoxidoe. Gen. 1. Phoxus, Kroyer, 1842. 39. Phoxus oculatus, distinguished by the 

 well-developed, darkly pigmented eyes, and from Plio.rics Jiolbdlli, Kroyer, "by the more 

 thickset form of body, the shorter and more obtuse frontal plate, as also by a somewhat 

 different shape characterizing the basal joint of the last pair of legs." Gen. 2. Hmpinia, 

 Boeck, 1870. 40. Harpinia ahyssi, distinguished by its size, reaching 13 mm., peculiar 

 form of basal joint of last pair of legs, " by the obtusely rounded lateral plates on the 

 3rd abdominal segment, and finally by the hunched projection formed above by the 

 succeeding segment." 41. Harpinia carinata, possibly males of preceding species, but 

 differing in structure of antennae, and also in " the distinctly keeled posterior division of 



