152 



THE VOYAGE OF H.M.S. CHALLENGER. 



Fig. 63, C— Phyllopod-like thoracic limb 

 of Nebalia geoffroyi, from Suhm, after 

 Claus. o, basal joint with branchial 

 appendage (K A ) ; /},. second joint with 

 lateral appendage {NA) ; 7, main branch ; 

 £-8, successive joints of the same. 



new form ; but in Nebalia, I think, this would not be 

 advisable, as our knowledge of this singular little group 

 is only beginning, and many discoveries of new forms 

 are to be expected which will better fix its systematic 

 position. The pectoral feet of this species are of great 

 interest, as confirming the opinions of Claus 1 and 

 Mecznikoff that the genus Nebalia should be associated 

 with the Schizopods rather than 

 the Phyllopods. The pectoral 

 limb of Nebalia geoffroyi (fig. 63, 

 C) shows very clearly the two leaf- 

 like appendages KA and NA, which 

 led earlier observers to place it 

 in the latter group ; in the corre- 

 sponding member of Nebalia (Para- 

 nebalia) longipes (fig. 63, D) one 

 of these KA is represented only by 

 a small rudiment, and the other has 

 lost its flattened form and become a 

 rounded limb comparable with one 

 branch of the typical Schizopod 

 appendage, such as that of Lopho- 

 gaster typicus (fig. 63, E). 2 Had 

 this been the first form of Nebalia 

 made known, the group would prob- 

 ably never have been classed with 



Phyllopods. From a Darwinian point of view this form, 

 which I propose to call Nebalia longipes, represents a 

 more advanced stage of these strange creatures, which 

 are the connecting links between Phyllopods and the 

 higher Malacostraca (Schizopods)." 



A large number of invertebrates were collected on the 

 reefs and on the sandy patches between the coral clumps. 

 Professor Wyville Thomson 3 found, in the collection of an 

 amateur naturalist, a small worn cup of the rare Crinoid 

 Holopus. He looked carefully in all the dredgings about 

 Bermuda for living specimens of this genus, but in vain. Dr. P. H. Carpenter gives the 



1 Claus, Zeitschr.f. wiss. Zool., Bd. xxii. p. 323, 1872. 2 Sars, M., Beskrivelse over Lophogaster typicus, tab. ii. fig. 35. 

 * The Atlantic, vol. i. p. 321, 1877. 



Fig. 63, E.— Thoracic limb of 

 Lophogaster typicus, from 

 Sars, for comparison. 



Fig. 63, D.— Corresponding limb of Nebalia 

 (Parantbalia) longipes, from Suhm. Let- 

 ters as in C. 



