50 ZOOLOGY OF THE VOYAGE OF H.M.S. SAMABANG. 



37. PHORUS, Be Montfort. 



The propriety of distinguishing the ' Carrier Trochi ' as a separate genus, is fully con- 

 firmed by the present discovery of two living species, in both of which the soft parts are 

 distinct from those of Troches proper. Except in that the eyes are not raised on pedicles, 

 the outward form of the animal is similar to that of Strombus, which Phorus resembles also 

 in its mode of progression. The shell produced by these genera is, however, so materially 

 different in its formation, there can be but little zoological affinity between them. 



The animal of Phorus is very slender in proportion to the size of the aperture of the 

 shell. The foot is small, produced, as it were, into two parts, of which the front is rather 

 expanded and more subservient to the purposes of locomotion, and the hinder tapering, sup- 

 porting a large horny operculum, which is partially free, as in Solarium. The proboscis is 

 very prominently developed and annulate ; and the tentacles are long and tapering, with the 

 eyes completely sessile on the outside of their base. The portion of the mantle lining the 

 aperture of the shell is vascular, thin, aud delicate, extending over the front and outer lip, 

 which is often much produced and uneven in outline, especially in P. Indicus and ewutus. 



The Phori are arranged by Mr. Gray next in order to the Calyptrcece, but it is obvious 

 that the genera, as already anticipated in the ' Conchologia Iconica,' are very remote from 

 each other ; the former have a divided S'tromb-like operculated foot, are of active habits, and 

 produce a regular convoluted shell, whilst the latter have a simple foot, live attached to 

 foreign bodies, are incapable of progression, have no operculum, unless the rare secretion of a 

 calcareous plate to the place of attachment can be regarded as the analogue of one, and the 

 shell is not formed on the spiral type ; all which external differences concur to show that the 

 Phori and Calyptrcece, whether regarded as genera or families, have little or no affinity with 

 each other. 



The Phori invariably inhabit rough places incapable of accommodating a gliding motion, 

 and their mode of progression, like that of the Strombi, is by little jumps. Each species has 

 its own peculiar manner of collecting the debris of shells or pebbles which cover the ground 

 it inhabits, and each has, to a certain extent, its peculiar kind of debris ; their conchological 

 peculiarities have, however, been already described in detail in the ' Conchologia Iconica.' 



1. Phorus Solaeioides. PL XVII. Fig. 6. Reeve, Conch. Icon. Phorus, pi. 3. f. 8. The animal 

 of this species is characterized throughout by numerous circular stria?, the tentacles are laterally com- 

 pressed and rather prismatic, the proboscis is long and transversely wrinkled, yellow at the tip and on the 

 under surface, but pink between the tentacles, which are straight, rigid, and opake dead-white ; the eyes are 

 black and conspicuous. 



Hab. China Sea. 



2. Phoeus exutus. PL XVII. Fig. 7. Reeve, Conch. Icon. Phorus, pi. 2. f. 7 a, b. The animal 



