CEPHALOPODA. 189 



Pearl banks. Gulf of Manaar. Five specimens [224, male; 225, 22G, female; 

 228, 229, arms mutilated, sex uncertain]. 



Station LXV., south end of Cheval Paar. One specimen, sex (?) [231]. 



The species seems to me sufficiently characterised by the presence of the peculiar 

 ocellar spot near the base of the ventrolateral arm, which is presented with more 

 than usual constancy in all the specimens of the series recorded above. A few minor 

 modifications which occur in the different individuals may be recorded as a means of 

 indicating the amount of variation in the species. 



In specimen 201, measuring 10 millims. from the hinder end ot the body to the 

 eye, the skm is comparatively smooth, three of the four warts forming the lozenge on 

 the back can be made out ; there are a few small warts around the eye, especially on 

 the left side, and the bases of the dorsal arms are granular. In the left ocellus the 

 pale ring is elevated above the general surface, and the pale spot in the centre also 

 forms a raised papilla. 



Specimen 216, measuring 10 millims. from the end of the body to the eye, is very 

 firm and shrivelled, and appears at some time to have been allowed to dry up. The 

 four warts on the back are very distinct, and some of the ridge like warts on the 

 bases of the arms are also visible. 



Specimen 224, measuring 10 millims. from the end of the body to the eye, is 

 somewhat more developed than Nos. 225 and 226 found witli it. The ocellar spot 

 on the left side is very distinct, but in the centre is a minute black point instead of a 

 pale patch. The four warts, arranged at the angles of a lozenge, are present, as well 

 as some on the bases of the arms. There is also a wart above and behind each eye. 



Polypus arborescens, n. sp. Plate II., figs. 8, 9 and 12, and Plate III. 



The Body is rounded, oblong, usually ending in an acuminate point behind ; the 

 mairlde opening is narrow, extending only about one-third the distance towards the 

 eye from the siphon, which is short and truncated, and reaches only one-third from 

 the mantle opening towards the margin of the umbrella. 



The Head is about as wide as the body, and the eyes are only slightly prominent. 



The Arms are on an average about twice as long as the body, measured from the 

 posterior end to the eye ; those of the fourth pair are the largest, the first the 

 shortest, The umbrella extends up them rather more than one-third their length. 

 The suckers present no unusual characters, the first four are in a single row, both in 

 a specimen with the arms strongly bent outwards and one in which they are nearly 

 parallel. The hectocotylus is of the form usual in the genus, with a very small tip. 



The Surface presents a number of branched papilla?, which constitute the most 

 characteristic peculiarity of the species and suggested its specific name. One of these, 

 larger than the others, occupies the acuminate posterior extremity of the body above 

 alluded to ; there are one or two over each eye, about a dozen on the back, a few on 

 the ventral surface, and in most cases one or two on the outer aspect of each arm. 



