REPORT ON THE SCHIZOPODA. 61 



anterior division of the body (see PI. X. fig. 12), and therefore at first supposed 

 the foremost to have been very possibly lost in dissection. Sulisequently, however, 

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

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

 trunk to want a separate ganglion, a feature likewise shown to characterise several 

 forms of the Penseidea. 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 oif on each side a nerve to the last pair of 

 legs. Hence, the total number of ventral ganglia belonging to the anterior division of 

 the body, counting those that supply the oral parts with nerves as one, would not 

 strictly be more than seven. 



In regard to the structure of the ganglia (see PI. X. fig. 12) they exhibit, as in 

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

 substance, connected by distinct fibrous commissures. Those of the anterior division 

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

 ganglia. The commissures, too, connecting the ganglia of the trunk are rather 

 thick, and he 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 separated and 

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

 ganglia and suppling 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 body. 



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; Globigerina 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; 

 bottom 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, 



