182 Mr. J. G. Jeffreys on the Marine Testacea 



Trochus zonatus, n. s. PI. II. f. 2, 3. 



Testa orbicularis, compresso-conoidea, tenuis, viridescenti-alba, zonis 

 nigris strigisque obliquis rubris ad suturam anfractuum maculatis 

 pulchre iiotata; anfractibus 4, convexiusculis, nitidis, sulcis spi- 

 ralibus latis (in ultimo anfractu utrinque 6, in penultimo 3) exca- 

 vatis et interstitiis confertim concentrice striolatis ; sutura distincta ; 

 apertura rotundo-rhomboidea, ad marginem exteriorem vix angu- 

 lata ; umbilico profundo, aperto ; long. ^V? 1^^- to incise. 

 Sestri di Levante and Spezia, at the roots of sea-weed in the littoral 

 zone ; not common. 



Although this pretty little shell has relations with Trochus umbi- 

 licaris in its young state, it may be readily distinguished by the 

 greater convexity of the whorls and the almost total want of any 

 angularity or keel on the last volution. The young of this species 

 closely resembles a Skenea, and it appears to form a passage to this 

 genus. 



Monodonta corallina. Ph. — M. Vieilloti, Ph. — M. glomus. Ph. — 

 M. Jussieui, Ph. 



Turbo rugosus. Ph. 



Phasianella pullus. Ph. ^B. M. — P. intermedia. Ph. I found the 

 last species in greater plenty than P. pullus, but in the same locality. 

 The spire is longer and the suture deeper, and the markings are 

 very peculiar and unmistakeable, as Philippi also remarked. The 

 fry resembles a Lacuna in form, and has the last whorl and umbilical 

 rea spirally striated. — P. speciosa. Ph. ; and var. 



Adeorbis subcarinata, B. M. {Natica? subcarinata. Ph.). Nice. 



lanthina communis, B. M. (J. bicolor, Ph.). — I. pallida, B. M. 

 (I. patula. Ph.). 



Littorina Neritoides, B. M. (Turbo Neritoides, Ph.). 



Rissoa lactea, Ph. ^ B. M. — R. labiata. Ph., allied to, if not iden- 

 tical with, R. striatula, B. M. — R. crenulata. Ph. ^ B.M.; and var. 

 minor. — R. cimex, Linn. (R.calsithiscns, Ph.); and var. alba. — R.cala- 

 thus, B. M. (R. cimex. Ph.). — R. Montagui, Ph. ; var. lineolata ; and 

 var. minor. — R. scabra, Ph. An analogue of R. punctura, B. M., 

 which it somewhat resembles. In fresh specimens the spiral cingula 

 are of a fulvous colour, as in R. Montagui, var. lineolata. — R. Beanii, 

 B. M. It seems surprising that this common and widely diffused 

 species should not have been known to Philippi, although I suspect 

 his R. textilis is the younger state of it before the outer lip and rib 

 are formed. 



Rissoa Phihppiana, n. s. PI. II. f. 4, 5. 

 Testa clavata, turrita, fusca, solidula ; anfractibus 6 planatis, in medio 

 subcarinatis, costellis longitudinalibus (in ultimo anfractu 12) cin- 

 gulisque transversis (in ultimo anfractu 5) instructis, cingulis 

 duobus superioribus tuberculos effcrmantibus ; sutura profunda ; 

 apertura subrotunda, marginata, subeffusa, tertiam spirse partem 

 sequante ; umbilico nuUo ; long. ■^^, lat. -^ unciae. 



This may possibly be the variety of R. dictyophora, which Philippi 



