46 Mr. J. W. Jackson on Lusitanian 
Havana and in the equatorial mid-Atlantic, while a very 
closely allied form—C. chuni, Bl_—oceurs in the Indian 
Ocean off the Maldives. The occurrence of Kingena alcocki, 
Joubin *, in the Indian Ocean is also significant, as, if well 
established, it can be correlated with the Cretaceous occur- 
rence of the genus in Europe. 
The following occurrences of certain Brachiopods in the 
Indian Ocean may also be mentioned, but more information 
is desired regarding their relationships. Lacazella mediter- 
ranea (Risso), a western Mediterranean species, occurring 
also off Jamaica and in the Gulf of Mexico, and asa fossil in 
the Miocene and Pliocene of Italy, is stated by Sir H. Barkly 
to occur off Mauritius; but this statement must be taken 
with reserve according to Davidson}. Liothyrina cernica 
(Crosse) was found in the stomach of a fish taken at 80 fath. 
deep off Mauritius. It is reported to approach the Medi- 
terranean ZL, vitrea (Born) and, even more closely, L. cubensis 
(Pourtales), the West Atlantic form of the Lusitanian 
L. sphenotdea (Phil.) {. According to Blochmann §, Studer 
mentions a Liothyrina from Mauritius which may belong to 
the same species. Further, a Liothyrina, sp. indet., is 
recorded by Dall || from south of Saya de Malha Banks, 
N.N.E. of Mauritius. In outward form it approaches 
L. bartlett’, Dall, from the Antilles region ; its loop shows 
affinity with JZ. sphenoidea (Phil.), and the spicule are 
closely allied to LZ. vitrea (Born). 
The relationship between the fauna of the Indian and 
Atlantic Oceans, as exhibited by the Brachiopoda, is also 
shown clearly by other groups of marine animals, A few 
points only can be referred to here. 
Doderlein § considers a number of the common sea-urehins 
of both faunal regions to be so nearly allied as to be better 
regarded as varieties only of one and the same species, rather 
than specifically distinct. 
Doflein ** remarks on the close affinity of the Brachyura of 
* Joubin, Bull. Mus. d’Hist. Nat. Paris (1906), 1907, pp. 529-582. 
(This has the appearance of a young form of Lagueus.—J. W. J.) 
+ Davidson, op. ett. pt. ii. p. 158. 
{ Crosse, ‘ Journal de Conchyliologie,’ vol. xxi. p. 285, and vol. xxii. 
P 75, pl. i. fig. 3 (1878); see also Davidson, op. ert. pt. i. 1886, p. 16, 
eiae. 19. 
: § Blochmann, op. cit. 1908, p. 625. 
|| Dall, Trans. Linn. Soc. Lond. 2nd ser., Zool. vol. xiii. pt. 3, 1910, 
p. 489, pl. xxvi. figs. 1-2. 
q Zide Blochmann, op. cit. 1908, p. 637, 
** Td, ibid, 
