150 PROCEEDINGS OF THE ACADEMY OF [1899. 



tioiis of these northern species will soon be published so that the 

 true interrupta may be clearly understood. 



All of these forms are distinct from T. rufa Philippi, specimens 

 of which, collected in 8-10 fathoms, Church Bay, Ireland, have 

 recently been received from Mr. Chaster, of Southport, England. 

 In these, there are but five, unevenly spaced, incised, spiral lines- 

 on the intercostal spaces and three or four, finer ones on the base. 

 In specimens from the same locality, of the smaller, distinct species, 

 T. fulvocinda Thompson, the intercostal spaces have a wide, unin- 

 terrupted portion next the suture, below which there are six incised 

 lines, varying in size in different specimens, and five, distinct one& 

 on the base. An example with 9 Avhorls is 6^ mm. long. Two 

 specimens from off" Cape Hatteras, N. C, labelled as var. fulvo- 

 dneta Jeffreys, sent me by Dr. Dall, differ decidedly from these. 

 Both have 9 whorls, but differ in length, one measuring 5, the 

 other 5^ mm. The intercostal spaces are cut by unequal spiral 

 lines, varying in number ; six or seven, wide and deep ones below,^ 

 and six or twelve finer ones above, the uj^per ones scarcely 

 visible. 



In 1866, Mr. Krebs, of St. Thomas, W. I., visited Amherst 

 College, and afterwards published " Eemarks on the C. B. Adams^ 

 Collection," in the ^nwa^s of New York Lyceum, viii, p. 395, 1866. 



Those relating to the species of Chemnitzia are as follows: 



"Chevmitzia exilic, C. flavocincta, C. Icevis and C. subulata are 

 very like each other. 



"Chemnitzia multicostata and C. substriata, when a sufficient 

 number of specimens are at hand, may prove to be synonyms. 



" Chemnitzia obeliscus is described from three fragments of differ- 

 ent individuals and C. puncta from two miserable specimens. 



" One species from Jamaica, seven from St. Thomas and three 

 from West Indies are without names. ' ' 



These show that Adams' specimens must either have been verv 

 poor or that the collection, as suggested by Morch, 1875, had been 

 disarranged when Mr. Krebs made these notes. It certainly is a 

 little peculiar that such different species so carefully described by 

 Adams should be so grouped. It is very unfortunate that only 

 the empty trays are now to be found in the cabinet, the specimens 

 themselves having been taken from the cases and not returned. It 

 is owing to these facts that the present collection is of peculiar 



