2 'J2 



have only one or two slits or fissures, varying in length and 

 width, while others have absolutely none. In my description of 

 D. Africaniim in this paper, I have remarked that the apical slit 

 is a very unreliable character in distinguishing species of this 

 genus. This is fully confirmed in the case of the species under 

 ■consideration. 



Scaphander puncto-striatus, Mighels. Proc. Boston 

 Soc. Nat. Hist. Vol. I., page 49, 1841. 



Vasco de Gama Pk. bearing S. 75° E. ; distant i'^\ miles; 

 depth, 166 fathoms; and Lion's Head N. 63° E., 34 miles, 154 

 fathoms. 



A single specimen of this little species, taken at each of these 

 stations. It has been found as far north as Iceland, and as far 

 south as the Gulf of Mexico, but I believe it has never hitherto 

 been found anywhere in the neighbourhood of South Africa. 

 Pilsbry remarks (Man. of Conch, Vol. XV., p. 246) that this 

 species inhabits comparatively shallow water in the north, but 

 the southern localities are all for examples dredged in great 

 depths. However it is interesting to note that much further 

 south it is found again in what we may call comparatively 

 shallow water ; for although we may call 1 54 fathoms deep 

 water, it is shallow compared with 533 fathoms, the depth at 

 which the species was found m the Gulf of Mexico, and 1,000 

 fathoms, where it was dredged off the Azores. 



[Published 8th July, 1903.] 



