174 MALACOZOA. GASTEROPODA. PECTIMBRAXCHIATA. 



above and below, and marked witb three or four grooves, one 

 of which extends halfway up the sph*e ; the canal bent down- 

 wards ; the colour pale reddish-grey, the mouth yellowish- 

 white. Length an inch and three-fovu'ths, breadth an inch 

 and a foiuih. 



Young individuals have the lip less expanded, or merely 

 thin and simple. 



Dr. Johnston gives the following account of this species : — 

 " Animal with two long cylindrical slightly tapered tentacula 

 of a scarlet colour spotted with pale yellow, yellowish on the 

 under side : eyes at the base, external, prominent, sessile : 

 mouth at the end of a long cylindrical snout, scarlet, speckled 

 wath pale yellow ; the tongue slender, cartilaginous, jointed, 

 invested in a sheath : body whitish, freckled with scarlet : 

 margin of the cloak plain, reflected, with a very short canal 

 in place of a siphon : penis placed under the opposite tentacu- 

 lum, retroflexed, curved, flattened ; rectum opening above the 

 penis with a narrow- orifice : foot somewhat pedunculate, ob- 

 long, truncate anteriorly, tapered behind, rather short, plain, 

 white : operculum fixed on the back of the foot, horny, ellip- 

 tical, and rather small. Creeps very slowly, the tentacula 

 being widely extended and used as feelers." 



In deep water off Aberdeen, Banff, and Macduff, not un- 

 common. 



Strombns Pes-pelecani. Penn. Brit. Zool. iv. 122. PL 75. f. 94.— 

 Strombus Pes-pelecani. Mont. Test. Brit. 253. — Rostellaria Pes- 

 pelecani. Lamk. Syst. vii. 193.- Rostellaria Pes-pelecani. Flera. 

 Brit. Anim. 359. — Chenopus Pes-pelicani. Jolinst. B. Tr. iii. 233. 



Family III. — Cy?r.eina. 



Animal with the body elongated, spiral, and covered 

 ■with a shell ; the head distinct, with U\o filiform or subu- 

 late tentacula, at the thickened base of which are situated 

 externally the sessile eyes ; the mouth at the bottom of 

 a small cavity, and furnished wdth a tl.in ribbon-like 

 tongue, beset with minute prickles in transverse lines ; 

 the mantle with two very large lobes, of which the 

 margins can be extended so as to meet externally on the 

 back of the shell ; siphon short, tubular but slit beneath; 

 branchiee two, pectinated ; foot very large, elongated ; 

 no operculum. 



Shell ovate or oblong, convolute so as that the last 



