REPORT ON THE SCHIZOPODA. 61 



anterior division of tlie Ijody (see PI. X. fig. 12), and tlioref(jre at first suppo.sed 

 the foremost to liavc been very possibly lost in dissection. Subsequently, however, 

 I learnt that Mr. Spence Bate, too, did not find a greater numl)er in the specimen 

 he dissected, and, moreover, that this zoologist has found the hist segment of the 

 trunk to want a separate ganglion, a feature likewise sliuwu lo characterise several 

 forms of the Penaeidea. The ganglion belonging to the penultimate segment of the 

 trunk, according to the statement of the same author, besides furnishing that segment 

 and its appendages with nerves, also sends ntf on each side a nerve tu the last pair of 

 legs. Hence, the total number of ventral ganglia l)elongiug to the anterior division of 

 the body, counting those that supply tlic oral parts with ner\^cs as one, would not 

 strictly be more than seven. 



In regard to the structure of the gangha (see PI. X. fig. I "2) they exhibit, as in 

 Gnathophansia, a very similar appearance, forming rounded masses of granular nerve- 

 substance, connected l)y distimt fibrous commissures. Those of the anterior division 

 oi the body are perfectly uniform in size, and somewhat larger than the caudal 

 >mnolia. The commissures, too, counectino- the "ansilia of the trunk are rather 

 thick, and lie close together in such a manner as readily, at the first glance, to be 

 taken for single, while those between the caudal ganglia are distinctly sejijarated and 

 rather long. In addition to a strong nerve-trunk, proceeding from either side of the 

 ganglia and supplpng the corresponding pair of limbs with nerves, another pair of 

 nerves is seen to originate from The commissures themselves, apparently innervating 

 the muscles of the Ijody. 



Colour. — According to the statement of the late Dr. v. Willemoes-.Suhm, the animal 

 exhibits, in a fresh state, a bright red colour throughout. 



Habitat. — The specimens procured by the Challenger Expedition were collected from 

 the following seven localities: — ■ 



Station 50, May 21, 1873; lat. 42' 8' N., long. 63° 39' W. (North Atlantic, south 

 of Nova Scotia); depth, 1250 fathoms; blue mud; bottom temperature, 38°"0. 



Station 73, June 30, 1873; lat. 38° 30' N., long. 31° 14' W. (North Atlantic, west 

 of the Azores) ; depth, 1000 fathoms; Pteropod ooze; bottom temperature, 39°'4. 



Station 92, July 26, 1873 ; lat. 17° 54' N., long. 24° 41' W. (Tropical Atlantic, north 

 of the Cape Verde Islands) ; depth, 1975 fathoms ; C41obigerina ooze. 



Station 107, August 26, 1873; lat. 1° 22' N., long. 26° 36' W. (Tropical Atlantic, 

 about midway between Africa and Brazil); depth, 1500 fathoms; Globigerina ooze; 

 Ijottom temperature, 37°'9. 



Station 146, December 29, 1873; lat. 46° 46' S., long. 45° 31' E. (Southern 

 Ocean, between Cape of Good Hope and Kerguelen) ; depth, 1375 fathoms; Globigerina 

 ooze; bottom temperature, 35° '6. 



Station 158, March 7, 1874; lat. 50° 1' S., long. 123° 4' E. (Southern Ocean. 



