266 TROCEKDINGS OF THE MALACOLOGICAL SOCIETY. 



pillar, ami the umbilical cavity above. Inside nacreous. Umbilicus 

 narrow and deep. Long. 3, diam. 3 mm. (L. 0"125, ]i. 0125). 



One immature and dead specimen from the " Warm area." It 

 resembles, but is not, T. suturaUs, Phil. 



Trochus (Margarita) Coulsoni, n.sp. PL XVI, Pig. 4. 



Shell resembling T. rhysus, "VVatson, but the spire rises in steps that 

 are more perpendicular, whilst their upper surfaces are broader and 

 flatter. The infra-sutural thread on the spire-Avhorls, besides bi'ing 

 more remote from the suture than in T. r/ii/sus, has much larger 

 tubercles, and below this the periphery is formed of two, not three, 

 tubercled threads. Below the nucleus, which is somewhat larger than 

 in T. rhysus, the top whorls are crossed by feebler and slightly curved — 

 not straight — rib-like threads. The base of the shell is broader and 

 flatter, and has five and not three tubercled threads below the one 

 from which the outer lip springs. This difference, however, may be 

 due to juvenility. Umbilicus, smaller and more closed. Long. 2"5, 

 diam. 2 mm. (L. 0-098, B. 0-079). 



I have to express my obligations to Dr. Boog Watson, who kindly 

 sent me his type specimen of 7'. rhysus for comparison, and for liis 

 critical examination of my shell. 



I have named this species after my friend Mr. Frank Coulson, of 

 Glasgow, in remembrance of our happy dredging trips in tlie West of 

 Scotland and in the Shetland Isles. 



EuLiMA Martvn- Jordan I, n.sp. PI. XVI, Fig. 5. 



Shell sub- cylindrical, thin, transparent, and glossy. Sculpture, 

 consisting only of microscopical and irregular lines of growth ; 

 periphery rounded ; colour glassy white ; spire straight and ending- 

 above in a blunt rounded apex. Whorls 7-8, slightly convex, the 

 last occupying rather less than one half of the entire length of the 

 shell. Suture rather oblique and Avell defined ; below it is a broad 

 white band where the layers of shell overlap. Mouth about a quarter 

 of the total length, broadly and regularly pyriform, expanded and 

 rounded below ; outer lip prominent in the centre and retreating above 

 and below ; inner lip slightly reflected over the short, oblique, and 

 curved pillar. Long. 3-75, diam. 1 mm. (L. 0-14, B. 0-04). 



This species is very distinct ; its sub-cylindrical shape, bhint apex, 

 and impressed suture readily serve to distinguish it. 



One live and one dead s])cciraen from the " Wai-m area." I have 

 named it after my son, H. Martyn Jordan, F.R.C.S. 



Eulima Frielei, n.sp. PI. XVI, Fig. 6. 



Shell slender, of moderate thickness, semi-opaque and glossy. 

 Scidpture, indistinct microscopical lines of growth. Colour opaline 

 white. Spire straight, long, and tapering to a very fine point. 

 Whorls 13-14, quite flat; the last occupying one-third of the entire 

 length. Periphery sharply rounded, but not keeled. Suture linear 

 and nearly straight. Mouth somewhat rhomboidal. twice as long as 

 broad, and forming about one-quarter of the total length, ex})anded 



