132 WORMS. MOLLttSCA. U-1& 



14. ASCIDIA. 



60. A. rustica. Oblong brownish with flesh-colour aper- 

 tures, rough at the extremities smooth in the middle. 



The ocean. Br. ZboL iv. U 23./. 3.5. Darbut t. 5. /. 4-. 



Body nearly cylindrical) flat Underneath, turned up at One end , 

 about 2 inches long. 



Bl k A. mamillaris. Somewhat parallel! piped, whitish: 

 apertures terminal, of the same Colour as the body. 



Cornrsh coast. Pall. Spirit. Zdol. io.pt. 24. t. 1./. 15. 



Body very irritable, variously shaped*, wrinkled and gibbous-, here 

 ftnd there fprinkled with foft bristles-, dirty white,cor1aceous: hipplt! 

 of the apertufes hemifphferical, rich fcariet within* 



15. DERRIS. 



f>2. D. sanguines 



Pembrokeshire coasti Linn. Trans. 3. t. ifrf. i. 2* 



Body cylindrical, mostly tapering to a point behind, jointed and 

 capable of great flexibility, covered with a membranaceous tranf- 

 parertt coat through which the internal parts are visible : head ex- 

 tended beyond the outer skin, lefs than the anterior part of the 

 body, to which it is connected by a membranaceous covering form- 

 ing a neck : feelers white, feated on the top of the 'head, capable of 

 being raifed or deprefsed at pleafure : fnouth with 2 lips* the upper- 

 one hooked and^mdveable, the lower straight and fixed. 



16. HOLOTHURIA. 



$3. H. Pentactes. Body with 5 longitudinal rows of tu- 

 bercles, and 10 ramified tentacula. 



The ocean. Br. Zool. iv. t. 26./* 41. Bdtbut t. 61 f. 6. 



Body about 6 inches long, cylindrical* a little incurved, greenish 

 brown : tubercles hollow, in pairs, with a fmall retractile filament 

 from each : tentacula elegantly ramified, yellow and filver, reddish 

 at their tips. 



It. TEREBELLA* 



64. T. conchilegai whitish* with numerous filiform cirri 

 round the mouth ; the upper-ones very long : bran- 

 chiae rich red* 



Pall. Miscell. Zbdl. t. g.f. 17. Br. Zool. iv. n. 2^ 

 Within the fabella cbnchilega* about 5 inches long. 

 Body flat* tapering towards the tail, pellucid, above reddish : head 



armed with 4 fcales beneath : tube or case taper, straight, compofed 



of minute particles of agglutinated fandj about the size of a goofe* 



quill, and neatly half a foot long* 



18. LIMAX. Snail * Slug,. 



65. L. ater. Body black, furrowed and wrinkled. 



Woods j Gardens* &c. BarbUt t. 3; /. 1. 



Body about 3 inches long, narrower at each end* convex on the 

 back, paler and flat beneath ; shield rough with numerous dots. 



66. L. rufus. Above dull reddish, beneath whitish. 



Damp shades. Barbut. tabi 3 f. 2. 



Body hardly 2 inches long, slightly furrowed* withot fpots or 

 belt : izxgzr fee lets black above 



67. h.flavus. Amber-colour, with whitish spots. 



In herbage Barbut. tab. 3. f 4. 



Body\a inch and a half long, prominent oa the back, hollowe* 

 underneath* slightly wrinkled. 



