l 2 2 



During tli*- cruise "i 11 M. S ■Siboga" specimens o\ this species were collected on two 



station gi: Madura Bay in the southern part of Molo Straitj on the shore. About 

 \l of 1 



\ B. As mentioned already p. 47 specimens <>f Ibla Cumingi Darwin were found attached 

 ti. several specimens of P. mitella at Station 51. 



is Lithotrya Sowerby 



1 >t" this genus si\ species were known to Darwin in 1851 and only «nu- new spei 

 (L. / lias been added to this number in the 55 years since then. They are found 



■ ,1 in cavities, in calcareous rocks, shells, or corals and have been observed "generally" 

 witliin the tropics. All tin- species occur only in shallow water. 



In the Malay Archipelago and in Australian waters, \, perhaps 5, ol the known species 

 been observed: /.. cauta Darwin, New South Wales, Australia; L. nicobarica Rhdt., Timor; 

 /. truncata Quoy et Gaimard, Philippines; L.pacifica Borradaile, Funafuti. [Perhaps /.. rhodiopus 

 f. 1-".. Gray, the habitat of which was unknown t<> Darwin, belongs to the same region also; 

 tin- Copenhagen Museum possesses specimens labelled /.. rhodiopus J. E. Gray, Funafuti; they 

 are specimens purchased from the Museum Godefroy. 



ll.M.S. "Siboga" met with specimens of this genus <>n five different occasions; tour 

 different species are represented in this collection. 



1 . Lithotrya nicobarica Rhdt. 



Reinhardt (1850) has given the description of this species founded 011 specimens trom 

 the Nicobar Islands. Darwin i 1851 1 when giving the description of this species in his Mono^raph 

 had Ki inhardt's paper at his disposal, luit he could nol compare the typical specimens used 

 by Reinhardt. The specimens which Darwin identified with R.'s species were trom Timor. 



Through the courtesy of the Director, Prof. Jungersen, and the Keeper of the collection 

 -f Crustacea, Dr. Meinert, of the Copenhagen Museum. I got free access to the specimens of 

 this species which are to be found in that Museum. They are — accordiiiL; to the label — from 

 Pulo Milu, Galatea. As Galatea Bay is the name of a Baj "f the [sland Sambelong Great 

 Nicobar), and as they are the only specimens of this species in the Museum, the probability 

 that they are the original specimens of Reinhardt seems great 1 . They correspond with Darwin's 

 description and figures in all essential regards. 



il forms collected during the cruise of II. M. S. "Siboga" belong doubtless to this 



ej are from two different Stations: from the reefs near Lucipara and from the 



of the Island of Kur, West of the Kei Islands. At both places, however, together 



1 '1 lu -^c hart not been put a>iilo a^ type-specimen iw tlic custom with specimens which have served Oir the institution 



• Dr. Mkineri could nol say «iili absolute cettainty, that they were Rbinharut's types. 



