YOUxXG CEPHALOPOD WITH PEDUNCULATE EYES. 317 



(2) The exceedingly rudimentary character of the shorter 

 arms or perioral processes of the forefoot in the youngest stage 

 observed (fig. 1^ b), and their total absence as well as the dis- 

 appearance of the suckers of the long arms in the older 

 specimens. 



The elevation of the eyes on stalks relatively so long and 

 so well-marked as in the present instance, is not, I believe, 

 known in any other Siphonopod. Possibly it is only a 

 transient arrangement — disappearing as growth proceeds ; 

 but such an elevation of the eyes is not presented by the 

 young of Sepia, Loligo, Octopus, or Argonauta, which are the 

 only members of the group whose young forms are certainly 

 known. 



The rudimentary character of the perioral arms is very 

 remarkable. Suhm describes them simply as " six suckers.^' 

 In the preserved specimens (which it is necessary to point out 

 are in a very poor condition) there is no trace of any perioral 

 suckers or processes. It is important to notice that in Owen's 

 figure of Cranchia scabra (reproduced in Bronn) eight 

 small perioral lobes or arms bearing suckers are figured, of 

 which six are much larger than the other two. It might be 

 possible to regard Sulim's drawing as indicating a young con- 

 dition of these six perioral lobes, but the fact that they dis- 

 appear instead of growing bigger in the older specimens, 

 necessitates a different conclusion. Suhm's Cephalopod must 

 be placed in a new genus which stands alone in the fact that 

 its suckers and also its perioral foot- lobes, excepting the long 

 pair, are aborted. 



For this genus I propose the name Procalistes (in allusion 

 to H.M.S. " Challenger ''), whilst the species can best be 

 named after its discoverer, P. Suhmii. 



The genus may be defined thus : 



. Similar to Cranchia, excepting that the eyes are pedun^ 



culate, that the shorter perioral arms are aborted, and that the 

 longer (so-called prehensile) arms are devoid of suckers. In the 

 youngest stage observed there are two rows of suckers on the 

 long arms, and six isolated and pedunculated suckers sur- 



