184 Messrs. Parker and Jones on 



Chilodactylus Allporti. 

 D.g. A.g:5_. L.lat. 55-56. 



Allied to Chilodactylus nigricans^ but with the body more 

 elevated and with the ventral fin reaching to or even slightly 

 beyond the vent. 



The height of the body is contained twice and a half or 

 twice and two thirds in the total length. Six simple pectoral 

 rays, the second of which is the longest, but projects only a 

 little beyond the membrane. Dorsal spines strong, the fifth, 

 sixth, and seventh being the longest, not quite one half of the 

 length of the head. The spinous and soft dorsal fins of nearly 

 equal height ; but the last spines are much shorter than the 

 first rays. Scales very rough. There are five longitudinal 

 series of scales above the lateral line ; and a band of minute 

 scales runs along the base of* the entire dorsal fin. 



Purplish brown, with six broad, slightly oblique, blackish 

 cross bands ; fins and opercular membrane deep black. 



Mr. Morton Allport has presented to the British Museum 

 two specimens, 11 inches long; but the species grows to a 

 much larger size, as we possess from another collection a third 

 example which is two feet long. 



XXVII. — On the Nomenclature of the Foraminifera. By W. 

 K. Parker, F.R.S., and Prof. T. Rupert Jones, F.G.S. 



Part XV. The Species figured hy Ehrenherg. 

 [Continued from vol. ix. p. 303.] 

 XIV. Foraminifera from the Chalk of the Isle of Mden^ 

 Denmark. (Monatsberichte, 1838, p. 192 ; Abhandlungen, 

 1838, table iii. pi. 4. fig. ii.) 



PI. XXIX. figs. 1, a, ^, c, Rotalia laxa, and fig. 2, U. lye.rfo- 

 rata^ must both be referred to the subdiscoidal variety of 

 Glohigerina hidloides known as Gl. cretacea, D'Orb. Figs. 3 

 to 7 are neatly grown, young or arrested FlanorhuUnce^ with 

 globose chambers, comparable with the early stages of growth 

 in Pl.farcta. They may for convenience be grouped as PI. 

 globulosa (Eliv.). Such are figs. 3, a, h, c, Rotalia densaj 

 fig. 4, B. senaria] fig. 5, E. quate7'naj fig. 6, B. globulosa?^ 

 1838 ; fig. 7, B. leptosjnra. 



Fig. 8, Botalia? (Flanulina?) monospiraj is a rotiform 

 Fidvinulina (?), with thick marginal wall and strong straight 

 septa, and with a curious symmetrical set of holes, one at the 

 base of each chamber, around the large, convex, central cham- 



