PYCNOGONIDA DREDGED DURING THE CRUISE OE H.M.S. "TRITON." 5 



of the legs, the structure of the first segment of the body, of the oculiferous 

 tubercle, &c, it is, however, easily distinguished not only from the above named, 

 but also from other species of the genus. 



The eggs of N. Strbmii are small and very numerous ; those of A T . macrum 

 are very large, each egg-mass containing a few eggs only. 



This species inhabits the warm water area. Four specimens were collected 

 at Station 10 ; nineteen specimens at Station 11. 



The U.S. Fish Commission took this species at a few localities in the Gulf 

 of Maine, in from 85 to 115 fathoms; the " Challenger " south of Halifax, in 83 

 fathoms. The depth at which it was collected during the cruise of H.M.S. 

 " Triton " was between 516 and 555 fathoms. 



6. Nymphon grossipes, Oth. Fabr. 



In all, eight specimens which I refer to this species were collected. In 

 most of its characters this species is very variable ; its conical and acutely 

 pointed oculiferous tubercle, the length of the third joint of the palpus, which 

 is longer than the second joint, and the armature of the second tarsal joint of 

 the leg, are, I think, the best marks for its distinction. 



Hitherto, this species was, in the Northern Atlantic, only observed in the 

 cold area. H.M.S. " Triton " collected four specimens in the warm and four in 

 the cold area, viz., three at Station 6, one at Station 9, and four at Station 10. 



7. Nymphon longitarse, Kroyer. 



At Station 11, at a depth of 555 fathoms, two specimens of this species were 

 dredged. They are very small specimens, having an extremely attenuated 

 appearance, with blunt oculiferous tubercles, and with the first tarsal joint 

 twice as long as the second. 



8. Colossendeis proboscidea, Sab. spec. 



This robust species is represented by a single specimen taken at Station 9, 

 at a depth of 608 fathoms. For a figure of this species I refer to my paper on 

 the Pycnogonids of the " Willem Barents." 



9. Colossendeis angusta, G. 0. Sars. 



G. O. Sars, Prodromus descriptionis, Arch, for Math, og Naturv., ii. p. 268, 1877. 



(Plate I. fig. 8.) 



This species is known from a short (Latin) description by Professor G. O. 

 Sars. Mr Wilson {Bull. Mus. Comp. Zool., viii. 1881, p. 243) got specimens of 

 what he believes to be the same species from deep water in the Atlantic, 

 between N. lat. 38° and 41°, and W. long. 65° and 73°, and points out several 

 differences of greater or less importance between his specimens and those of 

 Sars. 



