abstracts: conchology 95 



8. The kidney excretes vacuoles containing quantities of concre- 

 tions, but little protoplasm and no nuclei are thrown off. 



9. Each ganglion supplies a definite region of the body and there is 

 little overlapping. Reflex arcs exist. 



10. The otocyst is located in the end of the foot far from the pedal 

 ganglion and is a variable structure, sometimes consisting of as many 

 as eight lobes and sometimes of only one. In one instance three separate 

 ciliated tubes connecting them with the outside were discovered. This 

 indicates that they have arisen from three separate invaginations of 

 the ectoderm. This is the first instance of this sort found in lamelli- 

 branchs above the protobranchia. E. M. Smith. 



CONCHOLOGY.— Notes on California shells, II. Wm. H. Dall. 

 National Museum. Nautilus, 21: 109-112. 1911. 



Miscellaneous notes on species represented in the National Museum 

 and in various California collections. Bathytoma tre?nperiana, Modio- 

 lus diegensis and Pachyonia inazquale var. spiratum are described as 

 new. Paul Bartsch. 



CONCHOLOGY.— Notes on California shells, III. Wm. H. Dall. 

 National Museum. Nautilus, 21: 124-127. 1911. 



Miscellaneous notes on the distribution of many California species. 



Paul Bartsch. 



CONCHOLOGrY. — Notes on Gundlachia and Ancylus. Wm. H. Dall. 

 National Museum. American Naturalist, 45: 175-189. 1911. 

 Biological notes bearing on the validity and relationship of the two 

 genera, illustrated by a series in the National Museum. 



Paul Bartsch. 



CONCHOLOGY. — New species of shells from Bermuda. Wm. H. Dall 



and Paul Bartsch. Proceedings U. S. National Museum, 40: 



277-288, pi. 38. 1911. 



An account of species collected in Bermuda and of which a series is in 



the National Museum. The following are described as new and mostly 



figured. Mitra haycocki, Columbella somersiana, Aclis bermudensis, 



Turbonilla (Careliopsis) bermudensis, T. (Strioturbonilla) peilei, T. (S.) 



haycocki, Cerithiopsis movilla, C. ara, C. pesa, C. vicola, C. io, Fissuridea 



bermudensis, Odostomia (Chrysallida) nioba, and Ischnochiton (Steno- 



plax) bermudensis. A list of the species not new is also given which 



contains several not previously reported from Bermuda. P. B. 



