rOEAMINlEEBA OP THE IvEEIMBA AECHIPELAGO. 607 



Stations. 



The species, considering the latitade and shallowness of the deposits, is poorly 

 represented, never occurring in any quantity. None of the specimens attains a very 

 large size, but they are otherwise quite typical. Farther to the north, at Perim and 

 in the Red Sea, the species is one of the dominant types of Foraminifera in similar 

 depths. 



122. Alveolina melo (Fichtel & Moll). 



Nautilus melo Ficlitel & Moll, 1798, TM. p. 118, pi. xxir. 

 Alveolina melo d'Orbigny, 1826, TMC. p. 306. no. 2. 



„ Mobius, 1880, FM. p. 80, pi. iv. figs. 2-3. 



„ Brady, 1884, FC. p. 223, pi. xvii. figs. 13-15. 



„ Egger, 1893, FG. p. 249, pi. iii. fig. 31. 



10 Stations. 



More widely distributed and also more frequent than A. hoscii. It is most abundant 

 and attains its best development at Stn. 11. ■ At most of the Stns. two distinct forms 

 occur together, one spherical (most frequent), the other obtusely elliptical, suggesting 

 d'Orbiguy's species A. ovoidea and A. oblonga, which, however, merely represent forms 

 intermediate between A. boscii and A. melo {cf. F. 1904, SOF. p. 15, pi. iv. figs. 11-13). 



Family ASTR0RH1ZID.E. 

 Subfamily A s t K o E H i z i N ^. 



122 a. Astrorhiza limicola Sandahl. 



Astrorhiza limicola Sandahl, 1857, Ofversigt af K. Vetensk. Ak. Fdi'li. Stockliolm, vol. xiv. 

 (1858) p. 299, pi. iii. figs. 5, 6. 

 „ „ Brady, 1884, FC. p. 231, pi. xix. figs. 1-4. 



„ „ Agassiz, 1888, " Three Cruises of the ' Blake,' " vol. ii. p. 161, fig. 489. 



1 Station. 



A single specimen attached to the shell of uncertain origin before alluded to. 



IRIDIA H.-A. & E. 

 (Iridia nob., non Iridea Swainson, i\n<& Mollusca) *. 



123. Iridia diaphana H.-A. & E. (See Part I. of this paper, p. 371.) 



On a fragment of shell the locus of origin of which was not noted, was found a 

 particularly depressed adherent individual which, we think, represents a continuation 

 of growth in the young, finely granular, domed form. It is very depressed and flat 

 on the surface and largely constructed of small spouge-spicules buried in a brilliantly 

 wliite cement, forming a very striking and decorative object. 



* Swainson, ' A Treatise of Malacology ' (London, 1840), pp. 283-285, 371'. 



VOL. XX. — PART XVII. No. 9. — Novemher, 1915. 4 k 



