TRICHOTROPIS — SEPARATIST A. 45 



T. iNsiGNis, Middendorff. PI. 8, fig. ^8 ; ? PI. 7, fig. o9. 



Umbilicus small, shell thick, somewhat globose, witli undu- 

 lating crenulated spiral ribs, two of them usually more prominent, 

 angulating the body-whorl, aperture margin often crenulated, 

 epidermis light yellowish brown. Length, 18 mill, 



Beh ring 's St ra Uh. 



The second figure is referred to this species as a lengthened 

 variet}' by Aurivillius ; it ai)pears to me more like a variety 

 of T. borealis. 



Un figured Species. 

 T. MIGRANS, Dall. Xear Havana, Cuba. 



Remarkable as the first species of the genus found in tropical 

 waters. 



T. PUSiLLA, Gould. (= Fossarus). 



T. PERAMABTLis, Dall, Sitka. 



T, INFLATA, Friele, North Sea. 



T. ELLiPsoiDEA, Gould. ffoug Kong Bay. 



T. d'ORBiGNYANUM, Petit. (= Coralliophila, Manual, ii, 206). 

 T. TRiCARTNATA, and T. GRACiLENTA, Brazier. N. Australia. 



T, (Alora) Gouldii, A, Ad. Panama. 



Genus SEPARATIST A, Gray, 1847. 

 S. Blainvilleana, Petit. PI. 8, fig. 69. 



Widel}^ umbilicated, membranaceous, pellucid, under a roseate 

 corneous epidermis ; whorls 6, rapidly increasing, broadly tabu- 

 late, periphery with two spiral distant ribs on the spire, and 

 three on the body-whorl; aperture transverse, a little channeled 

 below. Diam. 10 mill. 



? Marianne Is. 

 S, Chemnitzii, a. Ad, PI. 8, fig. 70. 



Spire more depressed than the preceding species, with fewer 

 Avhoils, which are convex, the three peripheral keels closer and 

 not so prominent as in the last species, Diam. 18 mill, 



Philippines. 

 S. Grayi, a. Ad. 



Spire depressed; whorls with five keels; aperture transversely 

 oblong ; inner lip reflexed, anteriorly rounded. Unfigured. 



Cape of Good Hope. 



