SCINTILLA. 



Species 19. (Fig. a, b, c, d, Mus. Nobis.) 



Scintilla amuioua. Sci. testd pallkU miranti'i stu 

 alba, te.nui, oblongd, minutissinie punctulafd, siih- 

 diaphani'i, suhinjlatd ; latere postico long'wri, ad 

 Urminum siibdeciivi, props marginam vcntralcm 

 siibacuminato ; latere antko siibtnincato, medio 

 patili) contraeln ; manjinc ventralt plus miniisve 

 hianti. 



The amiuguocs Scintilla. Shell pale oraiigi; or 

 white, thin, oblong, very minutely piinctured, 

 subiliaphanous, subinflated ; posterior side rather 

 the longer, rather sloped at the end, slightly 

 acuminated near the ventral margin ; anterior 

 side a little truncated, middle a little contracted ; 

 ventral margin more or less gaping. 



Deshayks. ? 



Scintilla aurantlaca, Sowerby's Thesaurus as of 

 Deshayes. 



Species l'(». (Mus. Nobis.) 



Scintilla Mauhitiana. Sci. testd elumjatd, viridi- 

 auraiitid, moderate injlatd ; mar/jine ventrali late 

 hianti, margine dorsali recliasculd, terminibtis sub- 

 obli(jue breviter tnaicatis. 



The Macritu's Scintilla. Shell elongated, bright 

 orange, moderately inllated ; ventral margin 

 widely gaping, dorsal margin rather straight, 

 ends rather obliquely shortly truncated. 



Deshates. Edition of Lamarck's Anim. s. Vert. 



Hab. The jMauritius. — Isl. Bourbon. 



We tliink that the shell .figured in Sowerby's 



Thesaurus for this species is only an elongated 



variety of Scintilla amhigna. 



Species 21. (Mus. Nobis.) 

 Scintilla APEin-A. Sci. testd vinde auraiitid, hreriler 

 ohhmgd, ulriiajue sultru/icatd, concent/ ice svb- 



i-ugatd, suhrquilalerali ; ralndis medio nrcuatis : 

 ■undionihus tinniills : margine rentnill latissimi' 

 hianti. 

 The open Scintilla. Shell bright orange, shortiy- 

 olilong, rather truncated on each side, concentri- 

 cally slightly ivrinkled, subequilateral ; valves 

 arched in the middle ; umbones tumid ; ventral 

 margin very widely gaping. 



llab. The Jlauritius. 



Much shorter and more truncated than Scintilia 

 aurantiaca, with tlie valves remarkably arched, and a 

 very wide hiatus in the ventral margin. 



Species 22. (Mus. Brit.) 



Scintilla Bouneensis. Sci. testd albidd, concentrice 

 suhstriatd, fere clausd, suUnJlatd ; latere antico 

 breui, angustiori, oblique subtruncato : medio 

 subcontracto. 



The Boi:ne.vn Scintilla. Shell whitish, concentrically 

 substriated, nearly closed, rather inllated ; anterior 

 side short, narrower, obliquely subtruucated ; 

 slightly contracted in the middle. 



Deshayes. ? 



Ilab. Borneo. 



More inequivalve and oblique than Scintilla ambigua, 



and scarcely if at all gaping. 



Species 29. (i\Ius. Brit.) 



Scintilla Uecluziana. Sci. testd ro.'^eo-purpurascenti, 



teiiuissinid, oblongd, clausd, medio subcontracto; 



latire antico truncato. 

 Eeclcz's Scintilla. Shell rose-purplish, very thin, 



oblong, closed, .slightly contracted in the middle ; 



anterior side truncated. 

 Deshayes. Proc. Zool. Soc, 1(5J5, p. 178. 

 Hub. North Australia. 



February, 1.S7-L 



