On certain Species of Mediterranean Mblhisca. 251 



XXXII. — Remarks on certain Species of Mollusca described 

 and figured in the 1 Microdoride Mediterranean of Prof. 0. G. 

 Costa. By the Marquis de Monterosato. (Communicated 

 by J. Gwyn Jeffreys, F.R.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. Gr. J.] 



1. Trochus elegantissimus, p. 55, tav. ix. f. 1,= Mathilda quadri- 

 carinata, Brocchi. 



2. Trochus horridus, p. 56, t. ix. f. 6, a, b, c, = Craxpedotus Tinei, 

 Calcara, juv. 



3. Murex spinulosus, p. 56, t.ix. f. 2, a, b, = Pseudomurece bracteatus, 

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

 the Murex imbricatus of Brocchi, = M. lamellosus, Cristofori and 

 Jan, var. Babelis. — J. G. J.] 



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

 juv. 



5. Solarium cal car, p. 58, t. ix. f. 5, a, b, c, = Turbo rugosus, Linne, 

 juv. 



6. Murchisonia, p. 59, t. ix. f. 3, = Turritella triplicata, Br., pullns. 



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

 var. ecostata. [Var. laevigata, D'Orb. = S. striatula, Philippi. — 

 J. G. J.] 



8. Scissurella cingidata, p. 61, t. xii. f. 8, A, B, and f. 9, A, B, = 

 Schismope elegans, D'Orb. \_Sc7iismope cingulata, 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 affinis, p. 62, t. x. fig. 2, B, = S. costata, D'Orb., 

 var. elevata. [S. plicata, 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, 

 — Cyciostrema Cutlerianum, Clark, and C. nitens, Ph. [I cannot 

 agree with these determinations, unless the author has made a 

 mistake in the description of the sculpture as well as in the figures. 

 —J. G. J.] 



12. Spiroliclium rnediterraneum, p. 66, t. xi. f . 2 & 4, = Caecum 

 trachea, Montagu, pullus (Jefir.). [0. glabrum,'fry : see ' British 

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



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

 malogyra rota, Forbes & Hanley (Jeffr.). \_A. paucicostata, p. 72. 



