237 



NUDIBRANCHS FROM THE INDO-PACIFIC : 

 I., Notes on a Collection dredged near Karachi and Maskat. 



By sir CHARLES ELIOT, K.C.M.G. 



(Read before the Society, September 13th, 1905). 



The specimens noticed below were dredged by Mr. F. W. Townsend, 

 of the Indo-European telegraph service, near Karachi, Maskat, and 

 various points on the South Coast of Persia, but all, as it would seem, 

 outside the Persian Gulf. The collection comprises the following 

 species : 



No. of Specimens. 

 29 

 I 

 I 

 I 

 2 

 I 



1. Bornella digitata Adams &= Reeve 



2. Pleurophyllidia semperi Bergh 



3. PI. taeniolata Bergh 



4. Linguella sarasinica Bergh 



5. Thecacera maculata 5/!'. wt"?:;. 



6. Goniodoris modesta (?) A. cr' H. 



7. Chromodoris semperi Bergh 



var. nigrostriata Eliot 

 z/flr. tenuilinearis -/^«rr«« 



8. Chr. sannio Bergh ... ... ... i 



9. Chr. pusilla Bergh ... ... ... i 



10. Chr. petechialis {Gould) ... ... 4 



11. Casella atromarginata H. 6^ A. Adams i 



12. Platydoris townsendi 5/. «^z'. ... ... i 



13. Doridopsis miniata ^. (5^ ^. ... ... 9 



14. D. rubra {Kelaari) ... ... ... 23 



15. \). x\\gx2L {Stinipsoii) ... ... ... 3 



The pecular character of this list is due to the fact that it represents 

 the results of dredging, not of shore collecting ; hence, no doubt, the 

 paucity or absence of Flatydoris, Discodoris, Asteronotus, Hexa- 

 bra?i,hus and other forms which are usually abundant in the littoral 

 zone of the Indo-Pacific. But the genera and species are nearly all 

 already recorded from that ocean and are mostly characteristic of it, 

 as Bornella, Chromodoris, Doridopsis, which, in number of specimens, 

 form the large majority of the collection. If the identification of 

 No. 6 with Goniodoris modesta A. & H. is correct, the only exception 

 is Thecacera maculata. The occurrence in these waters of a form 

 hardly distinguishable from a British species is remarkable. 



The collection, therefore, indicates that, as all our other information 

 leads us to anticipate, the Nudibranchiata of the North-West Indian 

 Ocean are at any rate largely the same as those found near the East 

 Coast of Africa, the Philippines, and the South Sea Islands. 



