On certain Species of Mediterranean Mollmca. 251 



XXXII. — Remarks on certain Species of Mollusca described 

 and figured in the'' Microdoride Mediterranean of Prof. 0. G. 

 Costa. Bj the Marquis DE MoNTEROSATO. (Communicated 

 by J. GwYN Jeffreys, F.K.S.) 



[The work referred to by my correspondent purports to be a 

 description of a few well-known or entirely unknown minute 

 and microscopic animals of the Mediterranean, The first 

 volume only was published in 1861. The Marquis is 

 thoroughly acquainted with Mediterranean shells, perhaps no 

 one more so ; and the following endeavour to identify certain 

 obscure species is of considerable value. — J. G. J.] 



1. TrocJins elegantisshmm, p. 55, tav. ix. f. 1,:= Mathilda quadri- 

 carinaia, Brocehi. 



2. Troehus horridus, p. 5G, t. ix. f. 6, a, b, c, = Craspedotus Tinei, 

 Calcara, juv. 



3. Mureoc spinidosus, p. 56, t.ix. f. 2, a, b,=. Pseiulomurex bracteatus, 

 Br., var. Babelis, Requien. [I should be inclined to refer this to 

 the Murex imbricatm of Brocehi, = M. lamellosus, Cristofori and 

 Jan, var. Babelis. — J. G. J.] 



4. Murecc rugulosus, p. 57, t. ix. f. 4, a, b,= M. cristatus, Br., var., 



5. Solarium calcar, p. 58, t. ix. f. 5, o, b, c, = Turbo rugosus, Linne, 

 juv. 



(). Murcliisonia, p. 59, t. ix. f. 3, = Turritella triplicata, Br., pullus. 



7. Scissurella decijnens, p. 61, t. x. f. 1, A, = S. costata, D'Orbigny, 

 var. ecostata. [Var. Ivviqata, D'Orb. = S. striatula, Phihppi. — 

 J. G. J.] 



8. Scissui-ella cingulata, p. 61, t. xii. f. 8, A, B, and f. 9, A, B, = 

 Schismope elegans, D'Orb. [Schismope cingidata, not D'Orbigny's 

 species, which belongs to the genus Scissurella ; and I would add 

 figure 10, A, which does not seem to have been noticed by Costa. 

 — J.G.J.] 



9. Scissurella offinis, p. 62, t. x. fig. 2, B, = S. costata, D'Orb., 

 var. elevata. [S. plieata, Ph. — J. G. J.] 



10. Heliciella costellata, p. 63, t. x. f. 3, A, B, C,= Craspedotus 

 Tinei, Calc, pullus. 



11. Heliciella mutabilis, p. 64, t. x. f. 4, A, B, C, and f. 5, A, B, C, 

 z=Cyclostrema Cutlerianum, Clark, and C. nitens. Ph. [I cannot 

 agree with thlise determinations, unless the author has made a 

 mistake in the description of the sculptin-e as well as in the figui-es. 

 —J. G. J.] 



12. iSpirolidium mediterranemn, p. 66, t. xi. f . 2 & 4, = Ccecwn 

 trachea, Montagu, pullus (Jcft'r.). [(7. glabrum, fry : see ' British 

 Conchology,' vol. v. p. 209.— J. G. J.] 



13. Ammonicerina pulchella, p. 71, t. xii. f. A, B (a sinistra), = Ho- 

 malogyra rota, Forbes &Hanley (Jeffr.). [^A. paucicostafa, p. 72, 



