92 THE VOYAGE OF H.M.S. CHALLEXGEE. 



Tabulae view of the Gexeea of the Family Psychbopotid.£. 



'- '-L -—'. —.::-- -ik:i. ....... Gen. L Psycheotrephe*. 



EL Odd ambulacrum with, a doable row of pedicels. 



A. Ekttsal sarfaee with a large appendage crossing the odd interambalaenrm : 



a. I iepresse- igeeompi- ^:ed anteriorly 



:z :lf - -:•:;: :liri :: :'_r : Ij. . . . . Gen. EL Euj>hronide*. 



b. Body depressed anteriorly, tncTeasfng in height posteriorly ; appen- 



dage very long, situated close to or not far from the posterior end of 



the body, ........ Gen. EEL PgychropoUs. 



B. Dorsal surface without any large appendage, .... Gen. IT. Bmthodyies. 



P- " • •_'-.-. - n. gen. 



Boc; : - t hin and depressed, with the brim round its anterior and posterior 



- rather broad. Month and anns ventral, at some distances from the ends of 

 real les ten. Pedieeb arranged in a single row round the edge of the 



brim ; the odd ambulacrum naked. The dorsal surface with some minute pre - - 



Psuc'r ?.. n. sp. (PL YTLL fig. B 



Body broadest anteriorly, abou - : as long as its greatest breadth. Mouth and 



anus removed to a more or less considerable distance from the extremities of the bodv. 

 leg : tal sb thai :rrminal part with numerous small papillae round the edge. 

 Pedicels round the edge of the brim minute, hardly discernible. The dorsal surface with 

 - ^gle pair of minute pr: -- - at ~ _ r its middle. Integument thin, with four- 

 armed, cruciform ealcareou- - - provided with several pro; - ne issuing from 

 the centre and the other from the arms. 



Colour in aleonoLl:. _ I Length, about 25 mm. Breadth, about 1 2 mm. 



Habit L—8t bon 274 - ptember 11, 1575. L::. 7 : 25' >.. long. 152" 15' W. 



Z pfcJ ": j fathoms; bottom temperature, 0"9 ; C. : radiolarian ooze. One incomplete 



spe cim en. 



7 illy in :~Iual which has been brought home is, unfortunately, so defective as 



" ake a detailed examination impossible. The ventral surface is almost flat, while 

 dorsal is slighl :;, in consequence of which the shape of the body is 



i rmely L The brim is particularly broad at the anterior and posterior 



- of the body, while eh it is only visible as a more or less distinct 

 edge along each side of the nizal surface. In ience of the considerable 

 breadth of the brim anteriorly, that extremity of the body presents almost a cir- 

 cular, discoidal appearance with the mouth and tentacles in the centre. The broad, 

 thin part of the brim behind the anus has almost the appearance of a fin, the rays of 



