6 MK. E, S. GOODRICH ON A COLLECTION OF 



behind at the aj)ex. The siplion presents no peculiarity. The olfactory fold below the 

 eye is prominent, undulating, and with its two extremities turned forwards (fig. 13). 



The buccal membrane is large (in one specimen extending 2 cm, beyond the mandibles), 

 and provided with seven lobes bearing suckers. The horny ring of the latter is armed 

 on its distal border with strong teeth (fig. 15). The jaws are shown in fig. 14. Adhering 

 to the buccal membrane of tliis specimen (a large female) are spermatophores very 

 similar to those oi LolUjo Indica (PI. 2. fig. 28), but slightly thicker. 



The powerful arms are provided on both edges of the inner surface with a lateral 

 membrane, strengthened by transverse muscular ridges springing fi'om the base of the 

 suckers. This membrane is especially well-developed on the lower edge oE the second or 

 dorso-lateral arm. A median outer keel is developed along the dorsal and ventro-lateral 

 arms ; a lateral keel on the outer lower edge of the dorso-lateral arm ; and two lateral 

 keels on the ventral arms, the upper one being large and membranous. 



The suckers, closely set in two rows, are of moderate size, largest on the dorso-lateral 

 arms, where they attain a diameter of -35 cm. The horny ring is armed with from 20 

 to 28 strong teeth (generally 21-22), rather larger on the distal border (fig. 17). 



The stem of the tentacular arm is thick, and flattened near the base (13 mm. broad 

 aboixt 5 cm. from the base in the large female already mentioned), from the inner edge of 

 which springs a membrane reaching down below the buccal membrane. The club is 

 wide, provided with a keel on its outer edge and with a membrane on either side, and 

 bears four rows of suckers of tmequal size. The largest suckers, situated towards the 

 centre of the club, reach a diameter of 5 mm. ; their horny rings are armed usually with 

 15 teeth (figs. 18, 19) (sometimes with 16-18 teeth). The smaller distal and proximal 

 suckers and the outer rows of suckers usually have 17 large sharp teeth on the distal 

 border. At the tip of the club is a slightly spoon-shaped expansion, on which the 

 suckers are modified, and arranged in two rows on either side enclosing a space (fig. 12). 

 These suckers are highly specialized, being small, flat, and very short-stalked ; the 

 papillary area of the horny ring is very wide and beset with rows of conical teeth 

 reaching the margin (figs. 11 & 12). Such a special group of suckers constitute what I 

 shall call the apical set, an arrangement which has not, so far as I am aware, been 

 noticed by previous observers in the Myopsida. It is found in both sexes, and reminds 

 us strongly of a somewhat similar group in Onychotenthls; the apical set of suckers, 

 perhaps, forms a sort of " connective appai^atus." It occurs also in Loligo JPealei and 

 L. indica ; on the other hand, it appears to be absent in L. marmora and in the genus 

 Loliolus. 

 ^ In the male the hectocotylized left ventral arm is modified from about the 23rd pair 

 of suckers to the tip. In this region (fig. 16) the suckers are reduced to conical papillge. 

 The right arm, as noticed in other species by Steenstrup (7), is also slightly modified, the 

 suckers near the tip being unusually small. 



The pen is very like that of SejjioteutJns Blainvilliana, Fer., thin, lanceolate, convex 

 above, with a strong, raised, convex ridge down the middle (fig. 10). 



It is often very difiicult to distinguish between the various species of this genus 

 described by authors. Sepioteuthis Blainvilliana, Fer., and S. nlauritiana, Q. & G. (5), 



