from the Persian Gulf, &c. 15 



impressis, apud medium fortiter acute angulatis, undique costulis 

 obliquis decoratis, spiraliter fortiter rudiliratis, ultimo anfractu 

 etiam apud peripheriam fortiter angulato, et deinde ad basin 

 liris spiralibus, numero novem, praedito ; apertura ovata, labro 

 extus ad medium angulato, columella fere recta. 

 Long. 3, lat. 1 -50 frim. 



Bab. Gulf of Oman, lat. 24° 58' N. ? long. 56° 54' E., 

 156 fathoms. 



Allied to other Pleurotomellce from the same locality — e. g. 

 P. nereidum, amphitrites, eulimenes, &c. ; but differing from 

 all in its compact abbreviated-fusiform contour, wrinkled 

 sculpture, and coarse median angulation. The spiral lir?e, 

 too, are coarse and pronounced, proportionately speaking. 



Donovania tom/ini, sp. n. (PI. IT. fig. 26.) 



D. testa crassa, breviter et obtuse fusiformi, solidula, ochraceo- 

 brunnea vel fere nigra ; anfractibus 6-7, apice ipso perobtuso, 

 crasso, interdum quasi-immerso, caeteris longitudinaliter crassi- 

 costatis, interstitiis intercostalibus lsevissiinis, apud suturas im- 

 pressis, paullum ventricosis, ultimi costis anfractus numero ad 18, 

 ad basin spiraliter crassiliratis ; apertura anguste ovata, labro 

 effuso, columella fere recta, canali brevissimo. 



Long. 3, lat. 1 mm. 



Hob. Persian Gulf, llenjam Island. 



A good many specimens, collected together in 1906, showing 

 the species to be gregarious, if local. Superficially it 

 resembles Cer. tubercularis, Mont., or a Bittium, the colour 

 varying from ochre-brown to almost black. Thick in sub- 

 stance, the apical whoils sometimes appearing almost 

 immersed, causing the small longitudinal ribs of the third 

 whorl to stand out, just as if placed at the summit of the shell, 

 while in other examples the apex shows more distinctly and 

 normally. The aperture is narrowly oval, outer lip effuse, 

 columella almost straight, canal very short. With it occurred 

 Pyrgulina callista, Melv., and a small Triphora. 



This is the second Donovania recorded from these seas. 

 The first was described under the name of Lackesis bicolor, 

 Melv.* It gives me much pleasure to name it specifically 

 after Mr. J. R. le Brockton Tomlin, who is devoting much 

 time to the study of the smaller Mollusca. 



Turris invicta } sp. n. (PI. II. fig. 27.) 



T. testa breviter conico-fusiformi, turrit a ; anfractibus ad 14, 



* Mem. Manch. Soc. vol. xlii. part 2, no. 4 (1808), p. 14, pi. i. fig. 17. 



