284 " ENDEAVOUR " SCIENTmC RESULTS. 



E6067 and E6069 are young Polypi, having a mantle length 

 of 15 and 20 mm. respectively, and characterised by their 

 dark, cloudy coloration, rounded-oval body, faintly papillose 

 surface with a few scattered tubercles, and long and slender 

 arms, the third pair a little the longest. One large tubercle 

 and several smaller ones are evident in the neighbourhood 

 of each eye. 



Two very small, dark Polypi (E4881), each with a mantle 

 length of about 10 mm., are possibly referable here, as also 

 E5727, another rather more tubercidate specimen of similar 

 size and general appearance. It seems likely that these are 

 all only variant juvenals of the preceding species, but as they 

 have quite a different aspect it seems safer to mention them 

 separately. 



Specimen E3624 (PI. Ixxviii., fig. 3) has an aspect of its 

 own. It may be the same as the above, but differs in its 

 smoother skin, softer consistency, and more elongate body ; 

 all, however, features which might conceivably be affected 

 by the manner of preservation. 



Family CIRROTEUTHID^. 



Genus Opisthoteuthis, Verrill, 1883. 



Subgenus Teuthidiscus, nov. 



Opisthoteuthids differing from the typical species (0. 

 agassizii, Verrill) in the possession of a single, more or less 

 crescentic, bar-shaped cartilage for the support of the fins, 

 and further in the extreme degree to which the antero- 

 posterior flattening of the body has been developed. It 

 possibly should include all the described species of Opisthoteu- 

 this excepting 0. agassizii. 



Type. — The following species. , 



Opisthotextthis PLUTO, sp. nov. 



(Plate Ixxxi., figs. 4-5 ; Plate Ixxxii., figs. 5-8 ; Plates Ixxxiii- 



ixxxiv.) 



Aninial large, in outline subdiscoid to vasiform, according 

 as the arms and umbrella are expanded or closed ; tissues 

 in preserved specimens wrinkled and flabby. Body much 

 compressed in the peculiar fashion of the group ; so com- 

 pletely confluent \dth the head, umbrella, and arms as to 

 appear externally only as a low, rounded swelling in the 

 centre of the disk (PI. Ixxxiii.). Fins rather large, flabby, 

 oblong, about twice as broad as long. 



