CEPHALOPODA EfiOM THE CALCUTTA MUSEUM. 15 



arms. The three small and dorsal pairs of arms bear two rows of suckers, aud have no 

 lateral membrane. The large ventral arms have a membrane on the upper side ; toward, 

 the base they bear two rows of suckers, but about halfway up the suckers come to 

 alternate in so nearly the same sti*aight line that there appeal's here to be only one row. 

 The horny ring of the suckers (fig. 60) is armed mth rounded teeth on the proximal, 

 and powerful sharp teeth on its distal side. 



The tentacular arms are comparatively short, and provided at intervals with numerous 

 flattened suckers. The long clubs bear four rows of small suckers, the outer row of 

 which has the longest stalks. Round the margin of the club is a ribbed lateral 

 membrane ; the apex ends in thickened, deeply pigmented, aud somewhat spoon-shaped 

 knob. The horny ring of the suckers has a wide papillary area bearing sharp teeth, 

 and characteristically notched on its distal border ; the proximal margin of the ring is 

 smooth, the distal margin armed with powerful sharp teeth (fig. 61). 



I have not dissected out the pen ; it appears to closely resemble that of the foregoing 

 species. 



Although, as the description shows, this specimen closely resembles JDoratopsis, yet 

 the structui'e of the tentacular arms shows that it undoubtedly belongs to the genus 

 Cheiroteutliis. 



HiSTiOPSis HoTLEi, n. sp. (PI. 4. figs. 62, 63, 64, 65, 66, 67, 68, 69, 70, & 71.) 

 One specimen captured near the Andamans, at a depth of 190 fathoms. 



Length of mantle to notch between fins (upper surface) . 2"2 ceutim. 



„ „ to apex (lower surface) 1-9 „ 



Breadth ,, 1'2 ,, 



Length of fin-attachment to posterior notch "6 „ 



,, fin beyond mantle-apex -'i ,, 



„ combined fins 1"3 „ 



„ dorsal arm (riglit) 3"5 centim. (left) 3"3 centim. 



„ dorso-lateral arm „ 3*4- „ „ 3*7 „ 



„ ventro-lateral ,, „ 3-1 „ „ 3'-i „ 



„ ventral „ „ 3 „ „ 3-2 „ 



„ tentacular „ „ 7 „ 



„ pen 2'1 centim. 



Breadth of ,, -6 „ 



The mantle swells out slightly midway, then tapers to a blunt point (figs. 62 & 66), 

 Dorsally it projects above the neck ; the lower m.argin is nearly straight. The fins are 

 rounded, joined distally above the mantle-apex, beyond which they project. 



The funnel is strongly recurved {si., fig. 68); the two lips which bound its aperture 

 are so applied to each other as to leave a narrow U -shaped opening. The sockets at the 

 base of the funnel are I -shaped {so.) ; two small bridles bind it to the head. Inside we 

 find a small valve prolonged into the upper portion of the ' funnel-organ,' which covers 

 the upper or attached Avall of the siphon, and into which fit two rounded flaps fixed on 

 either side to the lower or free wall of the siphon. The whole arrangement closely 



