from the Persian Oulf, <£v. 1-17 



Hissoina, d'Orb., 1840. 



§ Chiliostigma, Bubgen. nov. 



Hissoina rcfngiiuii, sp. n. (PI. V. fig. 20.) 



11. testa isosceliformi, supra attenuata, alba, nitida, solidula: an- 

 fractibus ad 11, apicalibus la vibus, oitentibus, ceteris suturaliter 

 impressis, ventricosulis, undique arete et minute longitudinaliter 

 striate liratis, sti'iis paullum obliquis, interstitiis regulariter et 

 arctissime spiraliter puncturatis, punctis minutis, ultimo anfractu 

 infra peripheriam ourto, abbreviate) ; peristomatti albo, iucrassato, 

 lsevi, subtriangulari, paullum effuso, fore continuo, ad basin 

 oompresso, crassiore ; columella obliqua, apertura subovata. 



Long. 12, lat. i mm. 



Bab. Gulf of Oman, lat. 21° 50' N., long. 5G° 54' E. ; 

 156 fathoms. 



A remarkable' species, which seems worthy of separate 

 subgeneric rank, coming, it is true, near certain members of 

 Bubgen. Zebina or Zebinella, but differing in the close longi- 

 tudinal striation and interstitial close spiral pitting, the 

 puncturationa being very regular and minute. From these 

 circumstances I propose the subgenus Chiliostigma*. 



The neap st approach 1 can find in this large genus to our 

 species is 1\. mottezi, Bavay |, from Jamaica, very recently 

 described. I have only seen figure and description. It is 

 more decidedly costulate, but the deep spiral pitting is 

 represented, and I would consider it to belong to the same 

 new subgenus. 



Amphithalamus psomus J, sp. n. (PI. V. fig. 19.) 



A. testa minuta, oblonga, solidula, fusca ; anfractibus 5, quorum 

 npicalis miuutua, ceteris arctissime spiraliter striatis, ultimo 

 paullum elongato ; apertura subrotunda ; peristomate fere con- 

 tinuo, heto fuscescente, nitido, paullum expauso ; columella 

 simplice. 



Long. 3-25, lat. l - 75 mm. 



Hob. Mekran Coast, near Gwadur. 



A very small, dark brown shell, with slightly expanded and 

 reflected lip, very closely microscopically spirally striate 

 throughout. It has several allies in this region — columen y 



* gtXtos, ffrty/trt, thousand-pitted. 



t Journ. de Conch. 1917, p. 107, pi. iii. fig. 15. 



J \piofios, a morsel or tit-bit. 



