8G THE NAUTILUS. 



MODIOLA PLICATULA LAMARCK IN SAN FRANCISCO BAY. 



BY ROBERT E. C. STEARNS. 



The cry is, " Still they come." In my short note in the February 

 number of THE NAUTILUS, I suggested the probability that Mytilus 

 hamatus Say, would sooner or later be detected in the San Francisco 

 Bay region. Though not as yet reported, its near relative, Modiola 

 plicatula, is there sure enough, and has been for several years. 



Through the kindness of Dr. J. P. Smith, of the Leland Stanford, 

 Jr., University, I have received an example nearly two inches long, 

 collected on the eastern shore of the bay by Mr. N. F. Drake, in 

 1894, at a point "3 miles north of Stanford University." 1 am fur- 

 ther indebted to Dr. Smith for specimens of Urosalpinx cinereus, 

 from the oyster beds near Redwood city; these were collected by Mr. 

 E. E. Smith in 1898. 



Some time ago, Mr. Hemphill sent me several examples of Gemma 

 purpurea Lea.; these were compared by Mr. Dall with specimens in 

 the National Museum ; he wrote to me, saying, they " were about 

 midway between the typical southern form and the large flat north- 

 ern var. Totteni Stm." The shells were all dead, and might have 

 been brought in mud with the seed oysters, at the time the latter 

 were planted on the Alarneda flats. 



Los Anyeles, CaL, October, 1899. 



NOTE ON THE CLAUSILIJE OF CELEBES. 



BY E. R. SYKES. 



In their very valuable work * on the land-shells of this island, 

 Herr P. & F. Sarasin describe (p. 218) two new species of this genus 

 C. bouthainensis and C. menahassce and list the forms known hith- 

 erto. Unfortunately, a little note by the present writer, 2 in which 

 the species were listed, two new forms described, and the name of 

 (7. balantensis proposed for C. celebemis, Bttg. non Smith, appears 



1 Wiesbaden, Oct., 1899, 4to. 



*J. Malac. vi, pp. 23-4, pi. iv, pars (Aug. 1897). 



