2 HOVLE AND Standen, New Species of Sepia. 



and ending in a point. The cJiitinons margin is narrow 

 on the ventral surface, broader on the dorsal, being about 

 one-twelfth of the breadth of the shell in the middle, 

 broader in front and narrower behind. 



The dorsal surface {Fig. 3) is rugose, finely in front, 

 more coarsely behind ; along the middle line there passes a 

 slightly elevated longitudinal rib, narrow behind, gradually 

 widening as it passes forwards ; on either side of it is a 

 shallow groove, the remainder of the surface being evenly 

 convex. 



The ventral surface is but little elevated, the thickness 

 of the shell being greatest about one-fourth back from the 

 anterior extremity ; the last lociilns has an index of about 

 24; it has a shallow depression along the centre, and its 

 posterior boundary is deeply emarginate, the two limbs 

 being inclined to each other at an average angle of about 

 60° ; the two limbs start from a sharp curve in the middle, 

 diverge at first rather rapidly, then more gradually until, 

 where they reach the margin, they become slightly con- 

 vergent. The striated area is deeply grooved along the 

 centre, with a prominent rounded elevation on either side. 

 The inner cone is a broad flattened horny callus, coming 

 to a point behind, excavated in front, the two limbs 

 extending as narrow fillets along the sides of the striated 

 area for about half the length of the shell. The spine is 

 of medium size and curves slightly upwards. 



mm. 



