396 MR. F. CHAPMAN ON DEEP-SEA FORAMINIFERA 



BiLOCULiNA DEPRESSAj Orh., var. SERRATA, Brady. 

 Occurrence. — Sta. 11, 1417 fms. 



BlLOCULINA TUBULOSA, Costa. 



This is a species usually found in moderately shallow water. The present 

 occurrence constitutes a record for great depths. It is represented in the 

 soundings by a few examples of a small elongate variety. 



Occurrence.— ^i2i. 10, 1485 fms. ; 20, 1215 fms. ; 48, 2298 fms. 



BlLOCULINA LUCERNULA, ScJiwager. 



Biloculina lucenmla, Schwager ('66), p. 202, pi. 4. figs. 17 a, b. 

 B. hulloides, Brady (non d'Orbigny), ("84) p. 142, pi. 2. figs. 5, 6. 



The above species must not be confused with d'Orbigny's B. hulloides, 

 wliich has a rounder peripheral border, without the prolonged neck, and with 

 a distinct T-shaped valve. B. lucermda has been previously met with in the 

 Pacific, but it is always rare. 



Occurrence. — Sta. 13, 1050 fms. 



BlLOCULINA LUCERNULA, ScJiwctc/er, var. STRIATA, nov. (Plate 54. fig. 1.) 

 This variety is distinguished by the surface of the test being ornamented 



with moderately fine longitudinal strise. The shape of the test is comparable 



with the type-form. 



Occurrence. — Sta. 20, 1215 fms. 



Genus Spiroloculina, Orb. 



Spiroloculina excavata, Orh. 

 Occurrence. — Sta. 55, 507 t'nis. 



Spiroloculina dorsata, Reuss. 

 Occurrence. — Sta. 13, 1050 fms. 



Spiroloculina acutimargo, Brady. 



Occurrence.— 8tii. 11, 1417 fms. ; 13, 1050 fms. ; 20, 1215 fms. 



Spiroloculina tenuis, Czjzek. 



Occurrence. —Sta. 4, 2728 fms. ; 48, 2298 fms. ; 105, 2400 fms. 



Spiroloculina robusta, Brady. 



Spiroloculina robusta, Brady; Flint ('99), p. 296, pi. 42. fig. 1." 



This species was originally found at Culebra Island in the West Indies, at 

 390 fathoms. Dr. Flint, who regards this as a transitional form near 

 Bilocidina depressa, records it from the Gulf of Mexico at 200 to 1200 fathoms. 

 Since then it has occurred at Funafuti, off Tutanga, at a depth of 200 fathoms. 



