xxi AMMOTHEIDAE RHYNCHOTHORACIDAE 535 



transverse ridges on the body, a large proboscis, a 9 -jointed 

 palp, and somewhat peculiar ovigerous legs. Ciluncnln*, 

 Fragilia, and Scipiolus are new genera more or less allied to 

 Leionymphon, described by Loinan (1908) from the Siboga 

 Expedition. 1 Tanystylum, Miers (1879) (including Clotenia, 

 Dohrn (1881), and Discoarachne, Hoek (1880)), has append- 

 age I. reduced to a single joint or a small tubercle, and 

 appendage II. 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. Trygaeus communis, Dohrn 

 (1881), from Naples, has a 7-jointed, and Oorhynchus an <].-- 

 landiae, Hoek (1881), a 9 -join ted palp; the former has only 

 seven joints in the ovigerous leg. Lecytliorhynckvs armatus, 

 Bohm (1879), with rudimentary 2-jointed chelophores, and L. 

 (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 Bohmia, 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 2 is, in my opinion, undoubtedly 

 Ammothea hispida, Hodge, and so also, I believe, is his Pephredo 

 J/ irsuta ; P. umbonata, Gould 3 (Long Island Sound), is, with as 

 little doubt, Tanystylum orbiculare, Wilson. 



Fam. 5. Rhynchothoracidae. The animal identified by 

 Dohrn as fihynchothorax 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 -join ted, clawed ovigerous legs, which last are provided on 

 the last five joints 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 Nymphopsit, 



as a sub-family Nymphopsinae of Ammotheidae. 



- Edinb. New Phil. Journal, Oct. 1842, p. 367 (P. capillata on Plate). 

 3 Proc. Boston Xt. ///./. Sotieti/, vol. i., 1841-44, p. 92. 



