534 PYCNOGONIDA v. GHAB: 
10-jointed, and clawed; the terminal joints of the latter bear 
long straight spines, scattered over their whole surface; the 
proboscis is borne on a narrow stalk, and sharply deflexed. The 
egos form a single flattened mass, as in Pycnogonum. While the 
lack of palps would set this genus among the Pallenidae, the 
remarkable proboscis seems to be better evidence of affinity with 
Ascorhynchus and Eurycide.' 
Nymphopsis, Haswell (1881), is a genus of doubtful affinities, 
placed here by Schimkewitsch. The first appendage is well- 
developed and chelate; the palps are 9-jointed, the ovigerous 
legs are 7-jointed, none of the jcints being provided with the 
compound spines seen in Nymphon and Pallene. It is perhaps 
an immature form. Schimkewitsch has described another species, 
N. korotnevit, and Loman a third, WV. muscosus, both from the 
East Indies. 
Fam. 4. Ammotheidae.—Akin to Eurycididae in having 
the proboscis more or less movably jointed to the cephalic 
segment, and appendage I. reduced, non-chelate in the adult; 
the body is compact and more or less inperfectly segmented ; 
appendage II. 4-9-jointed; appendage III. clawless, and the 
number of joits sometimes diminished, with a sparse row of 
serrated spines; auxiliary claws usually present. 
Ammothea, Leach (1815) (rncluding Achelia, Hodge (1864) = 
the old non-chelate individuals): appendage I. very small, 2-jointed; 
appendage IT. 8-9-jointed; caudal segment fused with last body- 
segment; about eighteen species, four from the South Seas, two 
or three from the East Indies, the rest mostly Mediterranean 
and North Atlantic, in need of revision. Ammothea longipes, 
Hodge, is the young of Achelia hispida, Hodge; and Ammothea 
magnirostris, Dohrn, is apparently the same species. A. fibuli- 
fera, Dohrn, seems identical with Achelia echinata, Hodge (of 
which A. brevipes, Hodge, is the young), and so probably is A. 
achelioides, Wilson; Hndeis didactyla, Philippi (1843), is very 
probably the same species. A. wniwnguiculata, Dohrn (? Pariboea 
spinipalpis, Philippi (1843)), has no auxiliary claws. Leionym- 
phon, Mobius (1902), contains nine Antarctic forms, allied to 
Ammothea (including A. grandis, Pfeffer, and Colossendeis gibbosa, 
Mob., which two are probably identical), with characteristic 
? Pocock (Eneycl. Brit., 10th ed., Art. ‘“ Arachnida”) makes Hannonia the 
solitary type of a family. Cf. Loman, Zool. Jahrb., Syst., xx., 1904, p. 385. 
