MUSEUM OF COMPARATIVE ZOOLOGY. 135 



the absence of spots or dots, has much the same color markings. It differs 

 from the typical form in having a much shorter spire, a stouter olive-seed-like 

 form, and especially in the denticulation of the body callus, which, beginning 

 anteriorly, has two strong and a number of small not very regular ridges, be- 

 hind which is a marked depression, and then an even uniform series of about 

 ten fine ridges, the posterior of which is on the same line as the most posterior 

 ed^e of the outer fasciole ; the callus, throat, and nucleus are white ; the size 

 is larger than that of any jaspidea I have been able to find, and the shape is 

 that of 0. fuscocincta on a giant scale. The colors are usually pale, the whorls 

 transversely streaked with rather broad soft lines of pink or brown, which vary 

 from straight to zigzag, or may be more or less broken ; the glaze of the fasciole 

 and spire tends to brownish. Lon. of two specimens, 22.6 and 25.0 mm.; of 

 the aperture of the same, 16.6 and 17.0 mm. ; max. diam., 10.2 and 10.5 mm. 

 They are very thick and solid, but most of the specimens are smaller. 



Dredged by the Blake at Station 2, in 805 fms. ; Station 57, in 177 fms. ; 

 Station 20, in 220 fms. ; Station 36, in 84 fms. ; Station 34, in 400 fms. ; all 

 near Cuba; Station 132, 115 fms., off Santa Cruz; and Station 147, in 250 

 fms., near St. Kitts ; Station 167, in 175 fms., off Guadelupe; Stations 248, 

 259, and 262, near Grenada, in 161, 159, and 92 fms. ; in 72 fms., near Som- 

 brero ; and at Stations 261, 272, 273, 282, and 299, near Barbados, in 340, 76, 

 103, 154, and 140 fms. ; the bottom temperatures ranging from 40° to 65° 

 and averaging 57° F. Some very zigzag-marked specimens were obtained at 

 Station 152, in 27 fms., bottom temperature 67°. 5 F. 



Some of the specimens were almost white, none of them showed any very 

 dark coloration; the most intense markings were, as usual, the terminations 

 of the transverse lines just in front of the suture, where there is a tendency to 

 form a band of fasciculated streaks, as in many Olivellas. 



Olivella bullula Reeve. 

 Olivella bullula Reeve, Conch. Icon. Oliva, pi. xxx. fig. 96. 



A few poor specimens were obtained at Station 5, in 229 fms. ; Station 50, 

 in 119 fins.; and Station 20, in 220 fms. ; all off Cuba; also off Sombrero 

 Island, in 72 fms., living; and at Station 230, near St. Vincent, in 464 fms., 

 sand. 



These specimens were all poor, and only by studying them in connection 

 with material from the same region in better condition, brought by the U. S. 

 Fish Commission, could anything be made of them. Though varying much 

 in characters, in the present confused state of the genus it is perhaps most 

 advisable to refer them to this species. The differences between the different 

 stages of growth in Olivella require much study, and are doubtless of much 

 importance. Differences in proportion of the length of the spire to the whole 

 length, in stoutness or slenderness, and in color, may occur within the same 

 species to a very marked extent. As soon as we can determine the differences 



