1835.] 'lightning' AND 'porcupine' EXPEDITIONS. 37 



19. Natica dillwyni, (dillwynii) Payraudeau. 



N. dillwynii, Payr. Moll. Corse, p. 120, t. v. f, 27, 28. 



iV. dUlwyni, Hidalgo, Mol. mar. de Esp. lam. 20 c. f. 8, 9 (opt.). 



•Porcupine' Exp. 18/0: Med. St. G. Tmiis (yomig). 



Distribution. Throughout the Mediterranean and Adriatic, Ja- 

 maica (C. B. Adams, as N. proxima, in coll. McAndrew) : \&T./usca, 

 of a dark hue, Corsica {Susini) ; var. uvellana, nut-brown, Algieis 

 {Weinkauff, af. typ.) ; 20-120 fms. 



Fossil. Miocene : Calabria (fi^e^wen^^a). Pliocene: Pezzo {Philipxn). 



N. avellana of Philippi is the nut-brown variety. 



20. Natica vittata, Gmehn. 



Nerita vittata, Gm. ed. L. S. N. p. 3674. 



Natica intricatoides, Hidalgo, Mol. mar. de Esp. lam. 20 b. f. 12, 

 13,1am. 20 c. f. 10, 11 (opt.). 



' Porcupine' Exp. 1870: Atl. St. C. Espichel. 



Distribution. Marocco {Chemnitz^, Algiers {JVeinkauff, Jolt/), 

 Cadiz, Algesiras and Malaga {Hidalgo). 



I quite agree with Herr Weinkauff that this is Ginelin's species, 

 which was founded on the description and figures of Chemnitz, 

 Conch. Cab. v. p. 271, t. 188. f. ]yl7, 1918. It is Natica textilis 

 of Reeve, and N. intricatoides of Hildago ex typo. 



Resembles N. intricata in shape ; but the present species is much 

 larger and more globular, the colouring is darker, the wliorls are 

 n;ore convex, and the suture is consequently deeper, the spire is more 

 produced, and the umbihcus has a sharp ridge in the middle, and 

 a single (instead of double) groove below the ridge. According to 

 Reeve, Mr. Cuming's specimen has a calcareous operculum ; no 

 habitat was given for it. 



21. Natica stercus-muscarum, Gmelin. 



Nerita stercus muscarum, Gmel. ed, L. S. N. (1788) p. 3673. 



Natica hehreea, Hidalgo, Mol. mar. de Esp. lam. 20. f. 5-8 (opt.). 



'Porcupine' Exp. 1870: Med. St. C. de Gata, Benzert R,oad, 

 Adventure Bank, 



Distribution. Quimper {de Kermovan, f. CoUard des Cherres) 1, 

 throughout the European, African, and Asiatic coasts of the Medi- 

 terranean, Adriatic, and Canaries ; .5-120 fms. 



Fossil. Miocene : Vienna B.isin and the Continent of Europe. 

 Pliocene : Coralline Crag (as N. multipunctata of S. Wood), Belgian 

 Crag, South of France, Italy, and Algeria. Post- tertiary : Morea, 

 Khodes, Corinth, and Cyprus. 



Weinkauff has noted 14 synonyms. Martyn's specific name 

 hebraa is four years older than that of Gmelin ; but, as Von 

 Martens and Weinkauff have pointed out, Martyn's nomenclature is 

 not in accordance with the Linnean system. Lamarck's name 

 millepunctatu has been used by many conchologists, although it 

 must be borne in mind that the only habitats which he gave (the 



