170 LIST OF CONTRIBUTORS. 



Stearns, Robert E. C. Continued. 



Description of a new species of Dolabella, from the Gulf 



of California, with remarks on other rare or little-known species 

 from the same region. P '78, 395 



Observations on Planorbis. P '81, 92 



Verification of the habitat of Conrad's Mytilus bifureatus. 



P '82, 241 



Description of a new hydrobiinoid gasteropod from the moun- 



tain lakes of the Sierra Nevada, with remarks on allied species 

 and the physiographical features of said region. P '83, 171 



Stejneger, Leonhard. Remarks on Lanius robustus (Baird) 

 based upon an examination of the type specimen. P '85, 91 



Sterki, V. On new forms of Vertigo. P '90, 31 



Observations on Vallonia. P '93, 234 



Growth changes of the radula in land-mollusks. P '93, 388 



Stevens, N. M. On the germ cells and the embryology of Planaria 



simplissima. P '04, 208 

 Stevens, N. M. and A. M. Boring. Planaria morgan! n. sp. P '06, 6 

 Stevens, R. P. On the geology and mineralogy of Venezuela. 



P '68, 303 

 Stevenson, Wm. C, Jr. Additions to Mr. Cooke's paper on "The 



Valsei of the United States." P '78, 86 

 Steward-son, Thomas. On the Ailanthus silk-worm. P '61, 525 

 Stimpson, William. Descriptions of some of the new marine 



Invertebrata from the Chinese and Japanese seas. P '55, 375 



Descriptions of some new marine Invertebrata. P '55, 385 



Prodromus descriptionis animalium evertebratorum qua? in 



Expeditioni ad Oceanum Pacificum Septentrionalem a Republica 

 Federata missa, (Cadwalader Ringgold et) Johanne Rodgers 

 duce, observavit et descripsit. P '57, 19, 159, 216 ; '58, 31, 93, 

 159, 225 ; '60, 22 



On the marine shells brought by Mr. Drexler from Hudson's 



Bay, and on the occurrence of a Pleistocene deposit on the south- 

 ern shore of James' Bay. P '61, 97 



Description of a new Cardium from the Pleistocene of 



Hudson's Bay. P '62, 58 



— On an oceanic isopod found near the southeastern shores of 

 Massachusetts. P '62, 133 



— Synopsis of the marine invertebrates collected by the Arctic 



Expedition under Dr. I. I. Hayes. P '63, 138 



