28 



THE NAUTILUS. 



Macoma secta var.edulis Nutt. 

 Pholadidea ovoidea Gould 

 Semele nibiolineata ' ' auct. 



non Conrad" 

 Venempis lamellifera Con. 



Gasteropoda 

 Acmaea insessa Hinds (Na- 



cella insessa Hinds) 

 Acmaea instabilis Gld. (Na- 



cella instabilis Gld.) 

 Acmaea triangnlaris Cpr. 1 

 Fissuridea murina Dall (Gly- 



phis densiclathrata Rve.) 



Species collected by W. M. Wood at Bolinas Bay and not 



found in the Pacific Conchological Club collections or 



in the list given by Stearns. 



Lacuna unifasciata Cpr. 

 Lacuna solidula Sby. 

 Muricidea californica Hinds 

 Murex trialatus Sowerby 

 Ocinebra lurida Midd. var. 



aspera Bairs 

 Tegula montereyi Kien 



(Chlorostoma pfeifferi 



Phil.) 

 Thais lamellosa var. ostrina 



Gould 



Amphineura 

 Mopalia hiudsii 



Pelecypoda 



Entodesma saxicola Baird 

 Kellia laperousii Deshayes 

 Lithophagus plumulata Hani. 

 Lyonsia californica Conrad 

 Mytilimeria nuttalli Conrad 

 Pholadidea parva Tryon 



Saxicava arctica Linn. 



Gasteropoda 



Crepidula navicelloides Nut- 

 tall (C. nivea Gould) 



Haliotes fulgens Phil. 



Hippouyx tumens (Amalthea 

 tumeus Cpr.) 



Margarites pupilla Qould 



STUDIES IN NAJADES. 



BY A. E. ORTMANN. 



(Continued from page 22.) 

 LEXINGTONIA nov. gen. 



Shell subquadrate or subtrapezoidal, with slightly elevated 

 beaks, and well developed hinge teeth. Beaks not much an- 



According to Keep probably a variety of A. paleacea Gld. 



