526 THE VOYAGE OF H.M.S. CHALLENGER. 



1. Cerithiopsis pulchella (C. B. Adams). 



Cerithium pulchellum, C. B. Adams, Shells of Jamaica, 1850, p. 121. 



Sowerby, Thes. Conch., pt. 16, p. 880, sp. 138, pL clxxxiv. fig. 239. 



Station 24. March 25, 1873. Lat. 18° 38' 30" K, long. 65° 5' 30" W. Off Culebra 

 Island, West Indies. 390 fathoms. Pteropod ooze. 



Habitat. — Jamaica (Adams). 



Adams' use of this name has priority by eight years over Gwyn Jeffreys' application of it to the 

 British species. 



2. Cerithiopsis baltcata, Watson (PI. XXX. fig. 1). 



CeritMopsis balteata, Watson, Prelim. Report, pt. 5, Journ. Linn. Soc. Lond. vol. xv. p. 124, sp. 1. 

 July 29, 1874. Levuka, Fiji. 12 fathoms. 



Shell. — Small, dumpy, oval, reticulate, tubercled, strong, yellow, with an inferior 

 brown band. Sculpture : Longitudinals — there are on the last whorl about twenty rows 

 of tubercles, parted by narrow, deepish furrows ; they diminish in number on the upper 

 whorls, but run very straight from whorl to whorl down the spire ; they are largest and 

 most widely parted on the penultimate whorl, being rather crowded and narrow on the 

 last. Spirals — on each whorl there are two broad spiral threads, which rise into coarse 

 rounded tubercles, of which the upper row is the stronger. The lower row is coloured 

 brown. They are parted by a strong furrow. On the last whorl the upper spiral divides 

 into two rather feeble ones, and the tubercles on the brown spiral diminish in size. On 

 the contracted base is a small furrow, within which is a spiral broken into flat round 

 tubercles. Within this is a squarish-cut furrow, and within this a small spiral forms the 

 base of the pillar, which hardly projects beyond it. The whole surface of the shell is 

 microscopically cross-hatched with longitudinal lines of growth and spiral scratches. 

 These latter are strong on the point of the pillar. Colour is yellowish white, with a 

 broadish spiral band of brown, which embraces the whole lower spiral. The whole surface 

 is in this way pretty equally divided between a white and a brown spiral band. The 

 brown colour is probably more crimson when the shell is fresh. Spire is short, con- 

 tracting rather abruptly, with a convexly curved contour. Apex broken. Whorls 7, 

 excluding those of the embryonic apex, flat, contracted upwards on the spire, on the base 

 contracted downwards and produced. Suture invisible, in the bottom of a deep narrow 

 furrow. Mouth minute, roundly oval, with a rather large round canal, which turns in at 

 the back of the pillar. Outer lip contracted. Pillar very short, strong, rounded and 

 pointed. Inner lip thick and strong, and on the pillar projecting so as to leave rather 

 a deep fissure behind it. H. 0-087 in. B. 0045. Penultimate whorl, height 0*019. 

 Mouth, height 0-016, breadth 0-014. 



