144 NOTARCHUS. 



A. longicauda Q. & G., Voy. Uranie, ii, p. 421, pi. 66, f. 8. RANG,. 

 Hist. Nat. Aplys., p. 73, pi. 22, f. 8-10. 



1 Aplysia brongniartii BLAINV., Man. de Malacol., p. 472 (insuffi- 

 cient description). 



In this species the neck is quite long, the tentacles pointed ; tail 

 extremely long. The general color, in life, is a pleasing green, 

 sprinkled with dots of red surrounded with a circle of sky blue, and 

 here and there some other whitish and blue spots. Rang could not 

 see the labial tentacles in the preserved examples, but the natural- 

 ists of the Uranie affirmed their presence in the living animal. 



Section Aclesia Rang, 1828. 



Aclesia RANG, Hist. Nat. Aplys., p. 68. 



Body plump, long oval, with moderately stout, short neck and 

 head and short conic tail. Sole rather broad. Integument of the 

 whole upper surface bearing numerous digitate or branched append- 

 ages with simple ones among them. Lateral labial processes broad 

 and well developed. 



Type A. savignana. 



Allied to the restricted subgenus Notarchus in the plump form, 

 but differing in the strongly developed labial processes, wider sole 

 and elaborately fringed appendages of the integument. There is a 

 certain indistinct arrangement of the larger appendages of the in- 

 tegument into about three longitudinal rows on each side of the 

 dorsal slit. In Stylocheilus the fore and hind parts of the body are 

 more attenuated and longer ; but it is rather doubtful whether 

 Gould's group will eventually be held separable from Aclesia. 



The species are illustrated on plates 41, 42, 43 and 44. 



Distribution, tropical and southern temperate seas. 



Indo-Pacific : N. savignanus, laciniatus, Red Sea, Cape. 

 N. glaucus, New Zealand. 

 N. areola, Sandwich Is. 



West Indian : N. pleii, lacinulatus. 



N. SAVIGNANUS Audouin. PL 42, figs. 23-26. 



Length 13 cm. Very plump, with the tail attenuated and acum- 

 inate, neck rather thick. Tentacles and rhinophores very short,, 

 tufted by numerous slender processes ; a similar tuft in the middle 

 of the head above, and others distributed at somewhat regular in- 



