57 



Genus Pterotheca, Salter. 

 P. TRANSVERSA, Salter. — Gamache Bay ; Div. 1, A. G. Also in H. R. 



CEPHALOPODA. 



i 



0. Canadense, B., Rep. 1857, p. 321.— South-west Point ; Div. 4, 

 A. G. 



0. persiphonatum, B., op. cit., p. 329. — Cormorant Point ; Div. 3, 

 A. G. 



0. BucKLANDii, B., op. cit., p. 320.— South-west Point ; Div. 4, A. G. 



0. RAPTOR, n. sp. — Section circular ; septa moderately convex, six to 

 one inch where the diameter is fifteen lines ; siphuncle central or nearly so, 

 moniliform, the segments three lines in diameter where the width of the 

 shell is eighteen lines. Outer chamber and surface unknown. The 

 specimens are not perfect, but seem to taper at a rate of about three lines 

 in two inches. The segments of the siphuncle are uniformly rounded at 

 the sides and flat at each end, the whole resembling a line of spheres 

 simply flattened a little by being pressed against each other longitudinally. 

 One specimen was collected one mile east of Otter River, and another 

 three miles west of Jupiter River ; Div. 2, A. G. J. Richardson. 



0. Medon, n. sp. — Sepia rather strongly convex, six lines distant from 

 each other where the diamater of the shell is thirty lines ; siphuncle 

 large, apparently a little excentric, inflated between the septa, the seg- 

 ments being in the form of spheres compressed at both ends. The 

 specimen is six inches in length, thirty hues in diameter at the larger, and 

 twenty-one lines at the smaller extremity. It is worn away on the opposite 

 sides, so that it cannot be ascertained whether the section is circular or 

 otherwise. The siphuncle is exposed on one side the whole length. Its 

 diameter is twelve lines throughout. The segments are uniformly rounded 

 on their sides, not more inflated on the apical side than they are on the 

 anterior side, but simply a line of spheres compressed longitudinally as in 

 0. raptor. South-west Point ; Div. 4, A. G. J. Richardson. 



0. iNFELix, n. sp. — This species is founded on portions of two siphuncles. 

 The first is twenty-seven lines in length ; twelve lines in diameter at the 

 larger and eight lines at the smaller extremity ; and consists of ten num- 

 muloid segments with uniformly rounded edges. The second specimen is 

 eighteen Unes in length, eleven lines in diameter at the larger and eight 

 lines at the smaller extremity, with seven segments of the same form as 

 those of the first. The rate of tapering is not uniform, both specimens 

 being nearly cylindrical and narrowed only in the four segments at the 

 smaller end. South-west Point, Div. 4, A G. J. Richardson. 



