407 



helicoideo, bivolvi, inclinato ; anfr. 6-8 subplanatis, tabulatis, 

 clathris rectis conspicuis 14-16 et striis volventibus (6-10) ad 

 interstitia quadratim omnino decussatis. Apertura ovalis ; colu- 

 mella vix intorta. Axis 2 -|- ; diarn. .7 millim. Inhabits ? 



Two somewhat worn specimens vary a good deal in size and 

 form. 



Chemnitzia circumdata. T. ovato-conica, polita, straminea 

 vitta aurantiaca cincta ; anfr. 8 vix convexis et sutura vix indi- 

 catis, posticis plicis numerosis indistinctis ornatis, ultimo baud 

 insculpto et vittis 5 ornato. Apertura angusta ; peritremate 

 acuto. Axis 5 ; diam. 2 millim. Inhabits Sydney Harbor. W. S. 



Chemnitzia trachealis. T. pyramidalis, solida, alba; 

 nucleo parvo, valde declivi; anfr. 8 costis rotundatis validis 4 

 cinctis, quaram una tenuiore seepe in suturam celata ; interstitiis 

 omnino tenuissime clathratis. Apertura ovata ; columella vix 

 intorta. Axis 5.7; diam. 1.7 millim. Inhabits Simon's Bay. 



w. s. 



In the deficiency of the columellar fold it differs from the 

 Chemnitziae generally, as well as from Chemnitzia proper, in the 

 absence of bars and in the spiral sculpture. For these peculiari- 

 ties Mr. P. P. Carpenter * proposes a sub-generic distinction under 

 the name of s. g. Polyspirella. It is intermediate between Aclis 

 and Parthenia. 



Dunkeria effusa. T. valde protracta, gracillima, albida ; 

 anfr. 10 tumidis, posticis sejunctis, lirulis rectis circ. 30 saepe con- 

 fluentibus clathratis, interstitiis tenuissime decussatis. Apertura 

 ovata ; columella parum intorta. Long. 6 ; lat. 1 -f- millim. 

 Habitat Loo Choo. W. S. 



This elegant little shell connects Chemnitzia with Aclis, from 

 which it differs in its fine bars and slightly twisted columella. 



CoECUM GRACiLE. T. valde teres, parva, alba, annulis circ. 

 24, approximatis, subacutis ornata. Apertura baud contracta, nee 

 declivis, annulo crasso cincta ; margine lateral! subplanato ; oper- 

 culo ? Long. 2 ; diam. .3 millim. Inhabits China Seas. W. S. 



* To Mr. Carpenter I am greatly indebted for working out the diagnoses of 

 very many of the smaller shells described in this paper. 



