10 CYPFJEA. 



tisj dorso postice subtruncato, ad marginem leviter cre- 

 milato, trifasciatira cseruleo nebulato, punctis minutissimis 

 notato. 



24. neglecta, Soivb., (f. 374, 375, 376, 377, 378).— C. 

 testa G. hirundini affioi ; dorso postice valide truncato ; ex- 

 tremitatibus callosis, postica producta, antica acuminata ; 

 dentibus elongatis. 



25. Owenii, Sowb., (f. 367, 368, 369, 370, 371 ; var. mon- 

 strosa, f. 366) . — C. testa, G. hirundini affini ; dorso elevato ; 

 basi complanata; extremitatibus productis, acuminatis, ad 

 latera plano-depressis ; lateribus creberrime fusco punctatis ; 

 dentibus elongatis. 



26. copfea, ms., (f. 359, 360). — C. testa. G. hirundini affini, 

 brevi, ovata ; extremitate postica producta, incrassata ; denti- 

 bus labii terminalibus reflexis, ad dorsum continuis. 



27. Menkeana, Owen, (?. 333, 334; var. (Borneo) 512). — 

 C. testa. C. hirundini affini ; extremitatibus utrinque produc- 

 tis, callosis; quam C, neglectce dorso magis quadrato, breviori, 

 medio subdepresso. 



Note. — Felina ffabula), hirundo, neglecta, Owenii, coffea, 

 Menkeana. The large dark spots and thickened sides of 

 felina, exaggerated in the thickened and shortened variety 

 (fabula, Kien.), with the blunt extremities, are sufficient to 

 distinguish it from hirundo, although there may be some 

 similarity between modified forms of each. The oiitline 

 figures of the latter and two following species, express the 

 differences which it may be useful to observe. In hirundo 

 the back is low, and shelves down to the extremities. In 

 neglecta the shell ends in front suddenly with a short re- 

 flected margin, the back is truncated, and the neck con- 

 tracted and produced with depressed sides. In Owenii both 

 extremities are produced like the hinder one in neglecta, but 

 much more distinctly, while, on each side of the callus, at 

 each end, there is a deep flat depression ; the base is very 

 flat, the lateral brown dots much crowded on it, and the 

 back is almost angularly elevated. Specimens of this shell 

 have been brought to me as representing C. Menkeana, of 

 Deshayes, with which, however, it does not well agree. Sir 

 David Barclay kindly lent me the shell figured in my last 

 Plate (f. 514, 515), and believed at the time to represent 

 Deshayes' shell. But, on more careful examination, I am 



