184 THE VOYAGE OF H.M.S. CHALLENGEE. 



The tentacular arm lias been described but not figured by Verrill, a drawing of it is 

 therefore appended here (figs. 12-14); the central series of suckers should have been 

 represented as somewhat larger than the others as indicated by- Verrill. 



The pen (fig. 15) has a short, narrow, anterior extremity expanding into a 

 subcaudate blade, posteriorly it curves round the hinder end of the viscera, and then is 

 reflected as a very thin, irregular, membranous expansion. 



The fact that the same species (or at aU events two closely allied species) is found 

 both in the Western Pacific and in the Western Atlantic is of great interest, and 

 especially when considered in relation with the similar distribution of Octopus januarii, 

 Eledone verrucosa, Eledonella pygmsea, and Eledonella diaphana. 



The identification of the smaU specimen from New Zealand is uncertain. 



Family XIII. Cranchi^formes, Steenstrup. 



Subfamily Cranchiad^, Gray. 



Cranchia, Leach. 



Cranchia (Liocranchia) reinhardtii, Steenstrup (PL XXXI. figs. 11-14; PL XXXII. 



figs. 1-4). 



1857. LeacMa Reinhardtii, Stp., Hectocotyldannelsen, p. 200. 



1861. Cranchia Reinhardtii, Stp., Overblik, p. 76. 



1879. Loligopsis Reinhardtii, Tryon, Man. Concli., vol. i. p. 165. 

 {nee.) 1882. CraneMa Reinhardtii, Brock, Zeitschr. f. wiss. ZooL, Bd. xxxvi. p. 605. 



1884. Pefrotis Reinhardtii, Eochebr., Monogr. Loligops., p. 25. 

 (wee.) 1884. Cranchia cf. Reinhardtii, Pffr., Ceph. Hamb. Mus., p. 29. 



Habitat. — Station 106, August 25, 1873 ; lat. 1° 47' N., long. 24° 26' W.; depth, 

 1850 fathoms. Two young specimens, in all probability from the surface. 



North Atlantic, lat. 15° to 28° N., long. 18° to 32° W. (Steenstrup); within the 

 Tropics, longitude of the Azores (Kiel Museum, _^(ie Steenstrup). 



Tlie Body (fig. 4) is rotund and barrel-shaped, the diameter being greater than half 

 the length, bluntly rounded behind ; a little in advance of the posterior extremity on 

 the dorsal surface is a process containing the end of the pen (figs. 2, 3), to it are 

 attached ^QJins for about half their length. They are subquadrate, the posterior angles 

 being better marked than the anterior ; they are attached by their inner margins, for 

 the anterior moiety to the process of the body above mentioned, for the posterior to 

 each other. The mantle-margin passes anteriorly in even curves from one point of 

 attachment to another. From the point of attachment at either side of the funnel, 



