12 



tang'entiHl section jshows only thul the septii of the phragmocone are 

 j-athei" more than a line apart at the widest end. 



No. 2 is also a frag-ment near the anterior end of the guard, hut it is 

 entirel}^ free from any investing rock. As viewed transversely, its 

 outline is more nearly circular than that of No. 1, and its sides are less 

 distinctly compressed. The measurements in this instance are seven hy 

 scarcely six and a half lines across. The phragmocone (Plate I., fig. la) 

 which is loose in this specimen, is elongately but inversely conical and 

 inequilateral, with the apex distinctly eccentric. Its length is about 

 thirteen lines; its greatest width nearly six lines, and its least, less than 

 one. At its widest end it is ovate-orbicular in section, as is also the 

 alveolar cavity; the presumed bulbous termination is broken off. 

 Judging by faint lines on the cast, the septa appear to be slightlj^ 

 oblique and very numerous ; they are about a line apai't at the widest 

 end, and at least four times as close together at or near the point. ' 



No. 3 (Plate I., fig. 1) is the most perfect example yet procured, and 

 like the first, is entirely free from the matrix. Its length is an inch and 

 three-quarters, its greatest width seven lines, and its least, scarcely six. 

 The anterior extremity of the guard contains more than two-thirds of the 

 alveolar cavitj-, (as compared with No. 2) and at the opposite end wants 

 only the extreme apex. In this specimen the sides of the guard are 

 more decidedly compressed than they are in either Nos. 1 or 2. The 

 guard itself is sub-cylindrical, and does not decrease in size perceptibl}', 

 imtil about an inch from the tipj when it begins to narrow unequally 

 and rather suddenly-. The apex being broken off, it is impossible to tell 

 wdiether the tip was obtusely pointed or shortly acuminate, but the 

 contour of the remaining part shows that it was slightly eccentric. At 

 or near the tip there is a faint and inconspicuous groove, which probably 

 measured about seven lines, if we allow two or three for the piece 

 broken off. The compression of the guard is a little oblique, so that the 

 outline of a transverse section at the anterior end is elliptic ovate, one 

 end being a little wider than the other. The apical groove is j)laced, 

 not on either of the flattened sides, but in a direction corresponding to 

 that of the widest end of the ovoid. 



A longitudinal section of this specimen, kindl}^ made by Mr. Weston, of 

 which Fig. 1 is a representation, revealed some additional particulars. 

 The entire length of the guard is twenty -one lines, and of this the phrag- 

 mocone occupies ten lines. The apex of the phragmocone is slightly 

 eccentric, and seems to point in the same direction as does that of the 

 guard. Traces of what is supposed to be the siphuncle Avere detected 



