34 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 40. 



tuft of very fine spines at the three distal angles. This character, 

 however, is very variable, and I find that I can match this specimen 

 fairly well with some from Singapore in the collection of the Copen- 

 hagen Museum and with those from India in the collection of the 

 Indian Museum. The cirri are proportionately slightly longer than 

 usual, but here again it agrees with other specimens from India and 

 Singapore. In these two features it represents rather an extreme 

 type, and it may be that additional material will show the existence 

 on Mauritius of a peculiar species, a localized offshoot from the 

 0. serripinna stock. 



Nine specimens in Prof. J. Stanley Gardiner's collection from 

 Cargados Carajos which I recently examined at the British Museum 

 are similar to the preceding. The cirri are XIV-XVII, 18-22 (usu- 

 ally 19-20), the distal segments being about as long as broad. P 2 is 

 much larger than P t or P 3 and has nineteen segments, most of which 

 are about as long as broad, or slightly longer than broad. The lateral 

 processes at the distal ends of the outer pinnule segments are only 

 slightly evident; the segments of the pinnules succeeding P 2 have 

 rather strongly projecting distal edges and angles. The arms are 

 from 70 mm. to 80 mm. long. 



For the present it would be convenient to distinguish this form as 

 var. occidentalis. 



Family TROPIOMETRID^E. 



Genus TROPIOMETRA A. H. Clark. 



TROPIOMETRA CARINATA (Lamarck). 



lAlecto carinata Leach, Zool. Misc., vol. 2, 1815, p. 63. 



Comatula carinata Lamarck, Hist. nat. des animaux sans vertebres, vol. 2, 1816, 



p. 535.— Michelin, Revue et mag. de zool., 1845, p. 27.— Von Martens, in 



von der Decken's Reise in Ost-Africa, vol. 3, 1869, p. 129.— Pourtales, 



Bull. Mus. Comp. Zool., vol. 5, 1878, No. 9, p. 214. 

 Comatula bicolor Dujardin and Htjpe, Hist. nat. des zoophytes; echinodermes, 



1862, p. 208. 

 Actinometra Solaris von Martens, von der Decken's Reise in Ost-Africa, vol. 3, 



1869, p. 129. 

 Antedon carinata (part) P. H. Carpenter, Challenger Reports, vol. 26, Zoology, 



1888, p. 199 (but not pi. 34). 

 Antedon capensis Bell, Marine Investigations in South Africa, vol. 4, 1905, p. 139, 



pl.2. 

 Tropiometra carinata A. H. Clark, Smiths. Misc. Coll. (Quarterly Issue), vol. 50, 



1907, pt. 3, p. 349. 

 Localities. — Seychelles; Mascarine Islands; Zanzibar; Mauritius; 

 Madagascar; Saya de Malha; 1 Cargados Carajos; north reef, Farquhar 

 Atoll; the following localities in South Africa: off Algoa Bay, close 



i This locality is given by Bell as " Sd M. 300-500; " the solution of this missing word puzzle as given 

 In the key is " Saya de Malha, 55 fathoms." What is the significance of the "300-500? " 



