Goniodoris.] GASTROPODA. 557 



KEY TO SPECIES. 



A. Branchial plumes 7-9, tripinnate ; body brown, rarely pale, with 



white spots . . . . . . - castanea. 



B. Branchial plumes 5-6, bipinnate ; body yellowish-green, with 



brown dots . . . . . . . . . . punctata. 



1. Goniodoris castanea, Alder and Hancock, 1846. 



Goniodoris castanea, A. & H., Ann. Nat. Hist., xvi, 314 : and Monog., pt. 3, 

 1846, fain. 1, pi. 19 ; pt. 7, 1855, pi. 46, supplem. : Bergh, Malak. Blatter, 

 neue Folge, ii, 1880, 126, pi. 4, f. 14-21 ; Reise Philipp., Malac. Unters., 

 vi, pt. 2, 1904, 89, pi. 6, f. 12-14 ; Forbes and Hanley, Brit. Moll., iii, 

 572. Doris Paretii, Verany, Catalogo, 1846, 22, pi. 2, f. 4," 5 ; J. de Conch., 

 iv, 1853, 388. 



Body ovate, rather broad and depressed, of a reddish or chestnut- 

 brown colour, rarely pale, covered with small conical tubercles, spotted 

 with opaque - white. Mantle narrow, carinated centrally with an 

 ample reflected smooth sinuous margin, indented deeply behind. 

 Rhinophores rather short, bent backwards, 10 to 12. laminated, but 

 sometimes there are 15 to 20 laminae. Buccal tentacles broad, very 

 large, with acuminated tips. Branchial plumes large, tripinnate, 7 to 

 9 in number, forming a complete circle of a deep chestnut colour 

 round the vent. Foot broad and expanded. 



Length, 30 mm. ; breadth, 18 mm. ; height. 10 mm. (alcohol speci- 

 men). 



Jaw very narrow, consisting of granular thickenings of the cuticle. 

 Teeth of radula hooked ; the marginals with a broad base and a small 

 denticle. 



Hob. One specimen found on the hull of H.M.S. " Kingarooma ' 

 when in Dtago Harbour (Professor Benham). 



The type was discovered between tide-marks at Salcombe, in 

 Devonshire, by Mr. Alder. It also occurs in the Mediterranean. 



2. Goniodoris punctata, Bergh, 1905. 



Goniodoris punctata, Bergh, Reise Philipp., Malac. Unters., vi, pt. 2, 1904 

 (1905), 91, pi. 6, f. 15-22 ; Eliot, P. Mai. S., vii, 1907, 349. 



Body 6-9 mm. long and of a uniform yellowish-green, with numerous 

 reddish-brown dots, sometimes wanting. The dorsal margin has a 

 jagged appearance, as it is marked by a line of 7-10 simple lancet- 

 shaped processes on each side. Similar processes, 5 to 6, are found 

 on the frontal margin. On the dorsal surface are scattered tubercles, 

 about 5 in front of the rhinophores and 20 between the rhinophores 

 and branchiae. The part behind the branchiae is smooth. The 

 tubercles form 3 extremely irregular rows, of which that in the middle 

 is most definite. The head is produced into a blunt projection on either 

 side. The foot is not grooved in front and not produced at the corners. 

 The rhinophores are rather large ; they bear about 10 perfoliations, 

 and show no trace of sheaths or pockets. The branchial are 5 or 6. 

 scanty and bipinnate. 



