KI.IOT : NUniERANCHS FROM THE INDO-PACIFIC. 243 



are (i) that the third tooth has a distinct cusp, whereas in Alder and 

 Hancock's plate of T. pennigera it is quite flat ; and (2) that the 

 spicules are straighter and more uniformly nodulous. It is also pos- 

 sible that the animal may have a longer and more distinct tail than 

 T. pennigera. It therefore seems best to regard the species as 

 probably separate, and to await a further examination of the living 

 animal. 



Goniodoris Forbes. 

 Ten species have been referred to this genus : 



1. G. nodosa {Mtg.). 



2. G. castanea A. &= H. 



3. G. aspersa A. &• H. 



4. G. citrina A. &= If. 



5. G. modesta A. &= H. 



6. G. danielsseni Fnele &• Hansen. 



7. G. flavidula Bergh. 



8. G. obscura Stimpson. 



9. G. punctata Bergh. 

 10. G. barroisi Vayssiere. 



The tropical forms are not well known. G. flavidula appears to be 

 known only by a figure (Bergh, "Semper's Reisen," Heft v., pi. 25, 

 fig. 10), and G. aspersa, G. citrina, and G. modesia have not hitherto 

 been recorded suice the publication of Alder & Hancock's "Notice of 

 a collection of Nudibranchiate MoUusca made in India" {loc. cit. infra). 



The species here described is probably G. modesta A. & H., though 

 as it is represented by only one small specimen, and as Alder & Han- 

 cock apparently made their description only from a drawing, some 

 doubt as to the identity is possible. 



G. castanea is recorded not only from the Atlantic and Mediter- 

 ranean, but also from Otago, New Zealand, the identification being 

 vouched for by Bergh ("Semper's Reisen," vi., ii., p. 89). 



Goniodoris modesta (?) Alder & Hancock. 



Alder & Hancock, " Notice coll. Nudibr. made in India," Tr. Zool. 

 Soc, vol. 5, p. 132, pi. 28, fig. 12, 1864. 



One specimen from Karachi. Mr. Townsend remarks of the living 

 animal, "Colouring dark brown, more or less mottled; large branchiae 

 very light brown, small points (?) dark brown." The preserved speci- 

 men is purplish brown with traces of lighter mottlings but no indica- 

 tions of the pale margin mentioned by Alder and Hancock. Its 

 total length is 12 mm., and the maximum breadth across the branchiae 

 5.5 mm. A third of the total length is formed by the long thin tail, 

 which is only 1.3 mm. broad. The general shape is as described by 

 Alder & Hancock. The sides of the mantle are thin and sinuated, 



