MODIOLA. 



Species 55. (Fig. 68, Mus. Cuming.) 

 MoDiOLA cosTDLATA. Mod. testa ovatd, subexpansd, pel- 

 lucido-corned, postice et antice minnte subobsolete cos- 

 tulatd, umbonilius parvis contractis. 

 The finely-ribbed Modiola. Shell ovate, rather ex- 

 panded, transparent horny, posteriorly and anteriorly 

 minutely rather obsoletely finely ribbed, uraboes 

 small, contracted. 

 Risso, Hist. Nat. d'Europe Mcrid. vol. iv. p. 324. f. Ifio. 

 Crenella costulaia, Forbes and llanley. 

 Sail. Southern Europe. 



A small horny shell, with the umboes unusually con- 

 tracted. 



Species 36. (Fig. 69, Mus. Cuming.) 

 MoDloi.A nana. Mod. testd 'iiiiimtd, oblique ovatd, tenui, 



umboiubn» subroslratis ; pellncido-coriii'd, lineis riifes- 



centibus variegatd. 

 TiiK PWARF Modiola. Shell minute, obliquely ovate, 



thin, umboes somewhat beaked : transparent horny, 



variegated with reddish lines. 

 Lanistina nana, Dunker, Pro. Zool. Soc. 1856, p. 365. 

 Hab. Port Lincolu, Australia. 



A very minute semitransparent bronze-horny shell, va- 

 I'iegated with fine zigzag reddish lines. 



Species 57. (Fig. 70, Mus. Cuming.) 



Modiola subtokta. Mod. testd parvuld, siibtortd, oh- 

 luiigo-trapezind, versus mtiiones attenuatd, conceiitrice 

 riKjosd, postice albidd, antice nigricante-fuscd. 



The twisted Modiola. Shell rather small, slightly 

 twisted, oblong-trapezoid, attenuated towards the 

 umboes, concentrically wrinkled, posteriorly whitish, 

 anteriorly blackish-brown. 



Modiolarca subtorta, Dunker, Pro. Zool. Soc. 1856, p. 365. 



Hab. New Holland. 



A narrow trapezoid shell, peculiarly sliirluly twisted. 



The wood Modiola. Shell oblong, ventricose, rather 

 solid, shining chestnut, concentrically rudely striated, 

 narrowly contracted in the middle, umboes globosely 

 swollen. 



Hab. ? 



A rather solid ventricose shell, striated only concentri- 

 cally with a smooth shining-chestnut epidermis. 



Species 59. (Fig. 72, Mus. Cuming.) 



Modiola striatula. Mod. testd elongato-trapezind, sub- 

 angnstd, medio gibbosd, tenuiculd, undique radiatim 

 dense tenuiliratd ; oUvaced, nigra radiatim fasciatd. 



The striated Modiola. Shell elongately trapezoid, 

 rather narrow, gibbous in the middle, rather thin, 

 everywhere radiately densely finely ridged ; olive, 

 radiately banded with black. 



Hanley, Recent Bivalve Shells, p. 241. 



Hab. Philippine Islands. 



Of a peculiarly elongated trapezoid form, densely finely 

 ridged throughout, the ridges radiating oflf wider and 

 rather more distinct on the anterior margin. 



Species 60. (Fig. 73, Mus. Cuming.) 



Modiola emarginatus. Mod. testd oblongo-trapezind, 

 antice oblique subflabellatd, postice contractd, subcana- 

 Ucnlatd, radiatim tenuiliratd ; uigricante-olivaced. 



The emarginated Modiola. Shell oblong-trapezoid, 

 anteriorly obliquely somewhat fan-shaped, posteriorly 

 contracted, rather channelled, radiately finely ridged ; 

 blackish-olive. 



Benson, MS. in Mus. Cuming. 



Hab. ? 



Of more solid structure and less elongated form than 



the preceding species, not so strongly and regularly ridged. 



Species 58, (Fig. 71, Mus. Cuming.) 

 Modiola lignea. Mod. testd oblongd, ventricosd, so- 

 lidiusculd, nUente-castaned, concenirice rude striald. 

 medio angnste contractd, umbonibus globoso-tmnidis. 



January 



Species 61. (Fig. 74, Mus. Cuming.) 

 Modiola sulcata. Mod. testd elongatd, antice Jlabellatd, 



margine sidiangulatd, compressd, radiatim dense Jlexu- 



o-w-liratd, medio gibbosd, umbonibus prominentibus ; 



virescente-olivaced, nigricante oh^cure fasciatd. 

 The grooved Modiola. Shell elongated, anteriorly 



fan-shaped, slightly angled and compressed at the 



1858. 



