Profs. Parker and Jones on Ovulites margaritula. 77 



neck is 10; width ofprothorax at supra coxal dilatation 7*33; 

 height of head 7, breadth of head 10'5 ; length of mesonotum 

 and metanotum taken together 18*5, of abdomen 47'5, of 

 cerei 12, breadth of cerci 1*33 ; length of fore coxa 20, femur 

 24, tibia (straight portion) 10, first tarsal joint 8 ; length of 

 intermediate femur 24, tibia 24, first tarsal joint 5*5 ; length 

 of posterior femur 30, tibia 34, first tarsal joint 9 ; length of 

 tegmina 33, of stigma 6, breadth of tegmina 10. 



Hah. A single specimen, preserved in alcohol, from North 

 Australia [C. French). 



7. Tenodera australasice^ Leach. 



Mantis australasicB, Leach, Zool. Miscellany, p. 78, tab. xxiv. $ . 



Hah. North Australia [C. French). A single specimen, in 

 alcohol. 



Subfamily Pkoteromantina. 



8. Phthersigena Kraussii, Saussure. 



Haania Kraussii, Saussure, Mel. Orthopt. 4® fasc. p. 75, pi. 8. fig. 26. 



Hah. Two adult and two immature females from North 

 Australia (C French). 



Calcutta, May 4, 1877. 



X. — On Ovulites margaritula. 

 By Professors W. K. Parker and T. E. Jones. 



In the ^Ann. & Mag. Nat. Hist.' for April 1860, ser. 3, 

 vol. V. pp. 292, 293, we described the little egg-shaped and 

 pearl-like Foraminifer, named Ovulites margaritula by La- 

 marck, and its elongate varieties. At that time we referred 

 it to the hyaline group of Foraminifera ; but we have lately 

 discovered that it belongs to a different series. Some speci- 

 mens in particular are beautifully smooth, polished, and sub- 

 translucent, like the most delicate of the Peneroplides ; and 

 we mistook this for the " clear, smooth, glassy appearance " 

 belonging to the hyaline Foraminifers. Far more usually the 

 specimens are quite opaque and porcellaneous ; and this ap- 

 pearance we wrongly referred to fossilization. 



Whether ovoid, clavate, or cylindrical, Ovulites is really one 

 of the Dactyloporidse. D'Orbigny placed Ovulites next to Dac- 

 tylopora among his Monostegia (in 1851), but these comprise 

 some very heterogenous kinds. 



The apertures with which the shell-wall of Ovulites is per- 



