CEPHALOPODS OF THE PHILIPPINE ISLANDS 35 



Sepia papuensis Hoyle, 1885 



Sepia papuensis Hoyle, 1885a, p. 197. — Joubin, 1897, p. 102. — Adam, 1939b, p. 

 85. 



Description. — No material has been available to me of this species, 

 which lias been reported from the Philippines by Joubin (1897). 

 Therefore I have depended upon Hoyle's (1886, pp. 126-128) descrip- 

 tion, which is quoted below: 



The body is elongated, broadest about one-third back, pointed behind: the fins 

 extend the whole length of the body and are one-third of its breadth, a little 

 wider behind; they extend to within 1 mm of the anterior margin but are sep- 

 arated by about 5 mm posteriorly: the mantle-margin projects far over the head 

 dorsally, and is slightly emarginated ventrally. The siphon is conical, reaching 

 two-thirds up to the gap between the ventral arms. 



The head is short and broad; the eyes prominent. 



The arms are subequal, their order of length being 4,3,1,2; they are about one- 

 fourth as long as the body and taper to fine points: the dorsal are conical with a 

 very slight ridge up the outer aspect, the third pair have a similar ridge; the 

 ventral are flattened and bear a distinct crest. The suckers are in four series 

 throughout and of moderate size, set obliquely on short peduncles, with meridional 

 grooves on the outside: the horny ring bears twenty to twenty-five long, square- 

 cut, irregular teeth on its distal semicircumference, and outside it is an area 

 covered with closely set papillae. The hedocotylus was not observed, both the 

 specimens being females. The uvibrella is slight, reaching only as high as the 

 sixth row of suckers between the third and fourth arms, where it is widest; as 

 usual it is entirely absent between the two ventral arms. The buccal membrane 

 has the usual seven points. The spermatic pad is not developed; the outer lip is 

 smooth, except for a few ridges due to contraction; the inner bears numerous 

 small papillae. 



The tentacles are about as long as the body, the stem, being three-sided: the club 

 is short and flattened, and expanded, with a protective membrane on either side 

 and a broad web down the back, reaching along the stem for a distance equal to 

 half the length of the club; it bears six large suckers in the central row, a series of 

 smaller ones on either side, and some very minute ones along each margin : at the 

 top are fifteen to twenty in four series. The horny ring of the large suckers has 

 twenty-five to thirty teeth in its distal semicircle; those of the smaller about ten. 



The surface is smooth, except for a few irregular inconstant papillae on one 

 side of the ventral surface and below the eye. 



The colour is a pale yellowish grey, darker above. 



The jaws are as shown in figs. 16, 17 [not shown here]. 



The shell is oval in outline, broadest anteriorly to the middle, tapering some- 

 what rapidly and ending in a semicircle in front; posteriorly it tapers gently, and 

 then rounding off, ends in two almost straight lines, which meet at a right angle 

 at the base of the spine. The chitinous margin is but slightly uncovered on the 

 dorsal surface, which shows two grooves diverging as they pass forwards, separat- 

 ing three ribs, and is covered with rounded papillae arranged in curves parallel 

 to the anterior margin. The ventral surface has a rather broad and deep median 

 groove: the last loculus has an index of 34, and is bounded posteriorly by a wavy 

 line with three curves; the striated area is hollowed, so that this part of the shell 

 is thin; the inner cone commences by two limbs, which arise halfway along the 



