18S5.] 'lightning' and 'porcupine' expeditions. 37 



19. Natica dillwyni, {dillwynii) Payraudeau. 



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



N. dillwyni, Hidalgu, Mol. mar. de Esp. lam. 20 c. f. 8, 9 (opt.). 



'Porcupine' Exp. 18/0: Med. St. G. Tunis (yoimg). 



Distribution. Throughout the Mediterranean and Adriatic, Ja- 

 maica (C B. Adams, as N. proximo, in coll. McAndrew) : v&r.ftisca, 

 of a dark hue, Corsica (Susini) ; var. uvellana, uut-brown, Algieis 

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



Fossil. Miocene: Calabria (*Se^Me«^a). Pliocene: Vezzo {PhUipin). 



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



20. Natica vittata, Gmelin. 



Nerita vittata, Gra. 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 (^IFeinkavff, Joly), 

 Cadiz, Algesiras and Malaga (Hidalyo). 



I f|uite agree with Herr Weinkauff that this is Gmelin's species, 

 which was founded on tlie description and figures of Chemnitz, 

 Conch. Cab. v. p. 271, t. 188. f. lUlT, 1018. 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, tiie whorls are 

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

 produced, and the umbilicus 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 hebreea, Hidalgo, Mol. mar. de Esp. lam. 20. f. 5-8 (opt.). 



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

 Adventure Bank. 



Distribution. Quimper {de Kermovan, f. Collard des Cherres) ?, 

 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, 

 Rhodes, Corinth, and Cyprus. 



Weinkauff has noted 14 synonyms. Marty n's specific name 

 hebrcea 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 tlie Linnean system. Lamarck's name 

 millepuuctata has been used by many conchologists, although it 

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



