XXI AMMOTHEIDAE-—RHYNCHOTHORACIDAE 5 
transverse ridges on the body, a large proboscis, a 9-jointed 
palp, and somewhat peculiar ovigerous lees.  Cilunculus, 
Fragilia, and Scipiolus are new genera more or less allied to 
Leionymphon, described by Loman (1908) from the Siboga 
Expedition." YZanystylum, Miers (1879) (including Clotenia, 
Dohrn (1881), and Discoarachne, Hoek (1880)), has append- 
age I. reduced to a single jomt or a small tubercle, and 
appendage IJ. 4-6-jointed; world-wide; about eight species. 
Austrodecus glacialis and Austroraptus polaris are two allied 
Antarctic species, described by Hodgson (1907), the former a 
curious little form with a pointed, weevil-like proboscis, no 
chelophores, and 6-jointed palp.  Zrygaeus communis, Dohrn 
(1881), from Naples, has a 7-jointed, and Oorhynchus auck- 
landiae, Hoek (1881), a 9-jointed palp; the former has only 
seven joints in the ovigerous leg. Lecythorhynchus armatus, 
Bohm (1879), with rudimentary 2-jointed chelophores, and JZ. 
(Corniger) hilgendorfi, Bohm, with small tubercles in their place, 
both from Japan, have also 9-jointed palps: the former, at least, 
is apparently an Ammothea. Several insufficiently described 
genera, Phanodemus, Costa (1836), Platychelus, Costa (1861), 
Oiceobathes, Hesse (1867), and Béhmia, Hoek (1880), seem to 
be referable to this group; all have chelate mandibles, and may 
possibly be based on immature forms. 
Goodsir’s Pasithoe vesiculosa” is, in my opinion, undoubtedly 
Ammothea hispida, Hodge, and so also, I believe, is his Pephredo 
hirsuta; P. umbonata, Gould® (Long Island Sound), is, with as 
little doubt, Tanystylum orbiculare, Wilson. 
Fam. 5. Rhynchothoracidae.—The animal identified by 
Dohrn as Rhynchothoraz mediterraneus, Costa (1861), is a 
minute and very remarkable form, without chelophores, with 
large 8-jointed palps, reduced by fusion to five joints, and 
10-jointed, clawed ovigerous legs, which last are provided on 
the last five jomts with peculiar toothed tubercles. The general 
aspect of the body is somewhat like that of an Ammothea, 
which genus it resembles in the ventral insertion of the ovigerous 
legs and the somewhat imperfect segmentation of the body. It 
1 Loman conjoins all these genera, and also Lecythorhynchus, with Nymphopsis, 
as a sub-family Nymphopsinae of Ammotheidae. 
2 Edinb. New Phil. Journal, Oct. 1842, p. 367 (P. capillata on Plate). 
® Proc. Boston Nat. Hist. Society, vol. i., 1841-44, p. 92. 
