5 34 PYCNOGONIDA 



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 

 eggs 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 Eitrycidc} 



]Vy7nphopsis, Haswell (1881), is a genus of doubtful aflinities, 

 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 joints being provided with the 

 compound spines seen in Nyvvphon and Pallene. It is perhaps 

 an immature form. Schimkewitsch has described another species, 

 N. korotnevi, and Loman a third, N. niuscosus, both from the 

 East Indies. 



Fam. 4. Ammotheidae. — Akin to Eurycididae in having 

 the proljoscis more or less movably jointed to the cephalic 

 segment, and appendage I. reduced, nun-chelate in the adult ; 

 the body is compact and more or less imperfectly segmented ; 

 appendage 11. 4- 9 -jointed ; appendage III. clawless, and the 

 number of joints sometimes diminished, with a sparse row of 

 serrated spines ; auxiliary claws usually present. 



Ammothea, Leach (1815) (rncluding Achelia, Hodge (18G4) = 

 the old non-chelate individuals): appendage I. very small, 2-jointed; 

 appendage II. 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 hisjnda, Hodge ; and Ammothea 

 m^agnirosti'is, Dohrn, is apparently the same species. A. fihuli- 

 fera, Dohrn, seems identical with Achelia echinata, Hodge (of 

 which A. hrevipes, Hodge, is the young), and so probably is A. 

 achelioides, Wihon ; Endeis didactyla, Philippi (1843), is very 

 probably the same species. A. uniunguiculata, Dohrn ( ? Parihoea 

 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 



^ Focock {Encycl. Brit., 10th ed., Art. " Araclinida") makes Hannonia tlie 

 solitary type of a family. Cf. Loman, Zool. Jahrb., Syst., xx., 1904, \). 385. 



