342 Miscellaneous. The species of Ahelaphus may be thus tabulated : — a. Animal, including the inside of the ears and rump, uniform brown, with a few black hairs on the underside of the tuft of the tail. A. huhalis (the Bubale). Xorth Africa. h. Animal, including the rump, pale brown above, separated from the pale beneath by a well-detinod straight liue on the sides ; inside of ears white ; end of tail black. A. Lichtensteinii (the Godouko). Eastern Africa (Peters's ' Alossambique '). c. Animal brown ; inside of ears, rump, and back of legs whitish. * Face, dorsal line, and outside of limbs brown, like the rest of the animal ; end of tail black. Horns diverging. A. toi-a (the Tora). Abyssinia. ** Sides of the head, dorsal line, outside of limbs, and end of tail black. Horns thick, erect. A. mama (the Caama). South Africa. The British Museum has a pair of horns sent by ilr. Fraser from Tunis, which Mr. Blyth has described and figured as Boselaphos major (P. Z. S. 1869, p. 53, f. A, 1 & 2) ; and he says it has black marks above the hoof: but I have never seen this animal in the perfect state; and the horns are very like those of the common Bubale. On Ehopalorhynchus Kroyeri, a new Genus and Species of Pycno-gonida. By James Wood-Mason, of Queen's College, Oxford. Much difference of opinion has prevailed with regard to the sys-tematic position of the Pycnogonida, as to whether they should be classed with the Crustacea or with the Arachnida. By one set of naturalists (including Johnston, Milne-Edwards, De Quatrefages, Ivroyer, and Dana) they have been placed with the Crustacea ; by another, including LatreiUe, Erichson, Gerstiicker, and Huxley — who separates them, as well as the Tardigrada and Pentastomida, from the typical Arachnida (spiders, mites, and ticks) as an aberrant order — with the Arachnida. Dr. Anton Dohru*, who has recently studied the embryology of these animals, finds that they are in no way related to the Arachnida, that they resemble the Crustacea in having a naupliiform first developmental stage, but that from this point the course of development ceases to exhibit any thing in common with that of the Crustacea. Under these circumstances I have thought it better to call the cheliceres, paljjs, and accessor}/ hgs ( = mandibles and first and second pairs of maxillae of Krtiyer) of those who range the Pycnogonida with the Arachnida, the first, second, ami third pairs of cephcdic appendages respectively, thus avoiding the use of terms implying affinities and homologies that may not in reality exist. RHOPALOKHYNcnus t, gen. nov., "VVood-Mason. Corpus lineare, gracillimum, annulis thoracis perdistinctis, cylin-* Jenaische Zeitschnft, 1869. t p6iTa\ov, clava ; pvyxf^s, I'ostrum.