^Challenger'' Cephalopoda, 199 



developed. The umbrella is small, widest between the lateral 

 arras, where it reaches up to the sixth or seventh row of suckers. 

 The buccal membrane has five distinct points, the ventral edge 

 being thickened and forming a large folded spermatic cushion ; 

 it bears no suckers. The outer lip is thick, and marked with 

 fine longitudinal grooves ; the inner is papillate. 



The Tentacles are as long as the mantle, with a three-sided 

 flattened stem, much broader proxiraally than distally. The 

 club is slightly expanded, with a narrow protective membrane 

 below, a broad one above, and a distinct web outwardly. 

 There are five or six series of suckers, slightly larger in the 

 middle than at the margins, on very long slender peduncles : 

 the horny ring is smooth. 



The Surface bears a number of small irregularly scattered 

 papillae, four or five elongated warts near the origin of the 

 fins on the dorsum, and some folds in the skin on the ventral 

 surface ; probably these last are due to contraction. 



The Colour is a dull grey, with a bluish shade above, inclin- 

 ing to yellow below. 



The Shell has an elongate oval outline, broadest one third 

 of the way back and rounded off at both ends. The chitinous 

 margin is narrow anteriorly, then broader, evanescent poste- 

 riorly, a deep calcareous ridge forming the posterior extremity 

 of the shell ; it extends very little over the dorsal surface, 

 which bears only faint indications of a median ridge and is 

 beset with fine granules disposed in rows parallel to the anterior 

 margin. The ventral surface is elevated so as to give the 

 shell a more than average thickness : the last loculus occupies 

 one third the surface and is bounded by a transverse hemi- 

 elliptical curve : the striated area is excavated, but slightly 

 convex in the middle line. The inner cone consists only of 

 the slightly elevated limbs, which run along three quarters of 

 the striated area and unite with each other as a flattened fillet 

 posteriorly. The spine has lost its extreme point, but is strong, 

 and has a raised knife-like ridge developed upon its ventral 

 aspect *. 



Hab. Ofi" south-east coast of Australia (Station 163), depth 

 2200 fathoms. One specimen, $ . 



Metasepia, subgen. nov. 



Sepna [Metasepia) Pfefferi^, n. sp. 



The Body is short and stout, broadest about the middle of 



* Wlience the specitic name. 



t Named after Dr. George Pfefter of the Hamburg Museum. 



