320 Proceedings of the Royal Physical Society. 



the length of the body and six times as long as broad ; (2.) 

 in the large and almost regularly spherical suckers, which 

 are several times larger than those of T. pavo, and especially 

 on the lateral arms attain an astonishing size, so that the 

 largest have a diameter as great as the breadth of the arm ; 

 and (3.) in the presence of a toothed marginal membrane 

 along all the arms." 



In every one of these characters it will be noticed that 

 Professor Verrill's specimen differs from T. hyperhoreus, zxiOi 

 inclines rather to T. pave ; and further, a careful comparison 

 of his figures and description with those of Loligopsis pavo 

 (Les.), d'Orb., places it beyond all reasonable doubt that these 

 are identical. 



The general shape of the body is practically identical in 

 the two forms, but the fin is produced in Verrill's drawing 

 into " a long acute tip," which does not appear in Lesueur's, 

 but which may very well have been present originally, for 

 the posterior extremity of the type specimen has been 

 injured. 



The arms are not complete, " except those of the third and 

 fourth pairs, which are nearly equal in length, the ventral 

 ones a little the shortest and most slender " in both speci- 

 mens. In both specimens, too, " the arms are all united 

 together by a thin, delicate basal web, which extends up 

 some distance between the arms, . . . and then runs 

 along the sides of the arms, as broad, thin, marginal 

 membranes." 



As regards the horny rings of the suckers, d'Orbigny 

 figures two from the base of an arm which may have been 

 taken from this species, and which have square-cut teeth 

 somewhat variable in number. The sucker figured by Verrill 

 from the middle of one of the lateral arms (third pair) re- 

 sembles these very closely, and he adds that "toward the 

 tips of the arms the smaller suckers again become deeper, 

 with more contracted apertures, and with a few more pro- 

 minent denticles on the rings ; " but he does not allude to 

 the conspicuously four-toothed suckers characteristic of T. 

 cymoctypus, which so careful an observer could not fail to 

 have noticed had they been before him. 



