134 BULLETIN 100, UNITED STATE3 NATIONAL MUSEUM 



Biology. — Our specimens were living, ovicelled and preserved the 



ancestrula. The extrusion of the larvae was early in February, 1908. 



Affinities. — This species differs from Dacryonella subvespertilio, in 



which the avicularia are also placed on the mural rim, in its large 



micrometric dimensions and in its opesiules placed much lower. 



Occurrence. — 



D. 5147. Sulade Island, Sulu Archipelago; 5° 41' 40" N.; 120° 



47' 10" E.; 21 fathoms; co. S., Sh. 

 D. 5151. Sirun Island, Sulu Archipelago, Tawi Tawi Group; 5° 

 24' 40" N.j 120° 27' 15" E.; 24 fathoms; co. S., Sh. 

 Cotypes — Cat. No. 7936, U.S.N.M. 



DACRYONELLA SUBVESPERTILIO, new species 



Plate 14, fig. 1 



Description. — The zoarium encrusts foraminifera. The zooecia 

 are distinct, united by their mural rim, broad, often transverse; the 

 mural rim is very thin, salient, round; the cryptocyst is large, little 

 deep, smooth, somewhat convex. The opesium is small, trifoliated, 

 transverse; the proximal border is convex with two lateral opesiular 

 indentations rather deep and rounded. The distal border of the 

 mural rim bears two small triangular avicularia, arranged transversely, 

 the point directed towards the median axis of the zooecia. 



Measurements. — 



~ . f^o = 0.19 mm. „ . [Z,2 = 0.35 mm. 



Opesium 7 Zooecia 7 n . n n . _ 



1 I Zo = 0.11 mm. Us = 0.40-0.45 mm. 



Affinities. — This species much resembles Dacryonella vespertilio 

 Marsson, 1887, from the Cretaceous (Campanian) of the Island of 

 Rugen. It differs in its small avicularia placed transversely on the 

 mural rim and not interzooecial and parallel to the zooecial axis. 



The cryptocyst is very finely granulated, but this character is 

 little apparent at the magnification of our photographs. Our speci- 

 mens were dead. 



Occurrence— D. 5179. Romblon Light, Romblon; 12° 38' 15" N.j 

 122° 12' 30" E.; 37 fathoms; hard S.; 24.2° C. 



Holotype. —Cat. No. 7937, U.S.N.M. 



Genus CALESCHARA MacGillivray, 1880 



The ovicell is endozooecial, enormous, very salient and quite con- 

 vex. The polypidian lamella is very long; the opesiules are long and 

 linear. Neither avicularia nor onychocellaria. 



Genotype. — Caleschara denticulata MacGillivray, 1869. 



Range. — Eocene (Montian) — Recent. 



The opesiular muscles are here very powerful and united in long 

 linear bundles. This is an equatorial genus. The different species 

 can live both in the great depths (598 meters) and in the lesser depths 

 (36 meters). 



